The water circulating through the copper heat exchanger tubes absorbs the heat, and exits the heater a few degrees warmer than when it entered. Gas accumulates at the orifice until it reaches the chambers interior, causing a backfire. Replace the fuse if blown. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'fireplacehubs_com-large-mobile-banner-1','ezslot_4',113,'0','0'])};__ez_fad_position('div-gpt-ad-fireplacehubs_com-large-mobile-banner-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'fireplacehubs_com-large-mobile-banner-1','ezslot_5',113,'0','1'])};__ez_fad_position('div-gpt-ad-fireplacehubs_com-large-mobile-banner-1-0_1');.large-mobile-banner-1-multi-113{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:250px;padding:0;text-align:center!important}. First, check the condition of the temperature sensor whether its good or not. Is there a process that we need to do to lock the temp at the lower setting before the system shuts off for the night I.e., when we lower the temp do we need to touch the select button? Replace it. "primaryImageOfPage": {
If the burners are not igniting, check for clogs in the burner orifices, you can ream them out with a tiny wire, just a strand.
A dirty filter can prevent a heater from firing and it can also cause your heater to shut off before warming the water to the desired temperature. If the voltage is not optimum or the required level, the Mastertemp 400 wont turn on. Also, closed valve, fluctuating in power . "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
They have a have an SF code for Sensor Failure. Check your igniter module. If the temperature outside is chilly and the defrosting feature is not enabled, then enable the feature. View online or download Pentair MasterTemp 400 Brochure. So, was going to need to be replaced at some point. Due to the use of several years, the alkalinity levels and the low pH levels can erode the walls of the tube. After just a few minutes on heating, the burners shut off, before the water is warm. So I thought that was causing the problem. Replace if there have any defects. It should be damaged and crack-free for fluent water flowing. 4. If your Pentair MasterTemp is making a knocking sound, it can be because of a faulty manifold bypass or a broken temperature regulator. The thermal regulator should be in fine working condition. So, I opened the 3-port valve and adjusted it where the 2 return lines are fully open. Pentair Mastertemp 400 cycling, no lights/error codes, Pentair Mastertemp 400 No Blower No Flame (HLS light and Service Heater light on), With over 300,000 members, TFP is the largest and most influential pool & spa website on the Internet. Pentair Mastertemp 400 Cycles On And Off, 11. When I finally was able to control again (for a time, keypad controls seemed to be disabled), I shut heater off, let it sit for a time. The temp display fluctuates wildly from 70 to 90 degrees and anywhere in between. First, power cycle the heater to erase all the unwanted factors. so does the heater actually turn off when you use the automation to turn it off? "height": "219",
The biggest fear about theheat exchangeris that corrosion can occur to the relatively soft copper finned tubes, causing them to develop pinhole leaks. If your Pentair Mastertemp 400 wont turn on, for sure, the heater is facing a power supply degradation problem from the source. Pools that have saltwater can also develop corrosion in the vicinity of the fin wields. Leaking heat exchangers are often confused with sweating or condensating heat exchangers. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
Do this test with the water still running. Fireplacehubs.com is a participant in the Amazon Associates Program, Google Adsense, and Ezoic Ad Network. "logo": {
Solution: The solution to this problem is actually very simple and easy. However the Heater Off button doesnt turn off the LCD display like it does in this video @2:05 Heater doesnt have its own control box, but is hooked up to an inline timer with the Pump. cause the heater's pressure switch to turn OFF. Solution: Alter the chemistry of the water and reach an equilibrium. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. This can cause cycling. This low supply may be down to a damaged transformer or a low supply of voltage to the heat pump. I sent the following on May 23, but received no reply/advice. When the amount of scaling is very low, it might often be beneficial. So far I have replaced the thermal regulator, igniter, thermistor and the bypass valve in the manifold. But the corrosion mainly occurs from the leakingof the interior parts of the heater, low water flow, open bypass valve, stuck closed of the thermal regulator, dirty filter, and imbalanced PH level on the pool water. Test your control board with a multimeter. Still have the power light lit but no other lights are lit. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. . Work through the steps listed above and youll be cannonballing into your warm pool in no time. Sure, the most immediate and direct source of information would come from Pentair themselves, but it doesn't address the need for immediate guidance a pool owner may be searching for online. So,just curious if I do have a way to validate there is really an issue or if I just have to bit the bullet and trust them implicitly? Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. Same issue continues. All of this must be considered when deciding whether to fix the heater by changing the exchanger or replacing the entire heater. Save my name, email, and website in this browser for the next time I comment. Safety Controls. Thanks for the help. Replace the bad board. Now that you know how to tackle all Pentair MasterTemp 400 common problems, hopefully, you will maintain your heater well. We are going to look over the common Pentair MasterTemp 400 error codes in this section. Verify the control board is in well-working condition. HI! Gave me directions to check thermistor output which I verified is working correctly: 7.7K ohms for 89 degree water. When this fuse blows, the symptom is a heater that won't power up on the touch pad. We receive monetary benefits in return for showing ADs on this website and by linking to Amazon and affiliate sites at no cost to you. "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
Otherwise, the igniter is bad and you need to replace it. "author": {
Thats acting like a bad circuit board, but it would need testing to be certain, could also be moisture behind the display panel, near the circuit board. Traveler, food lover, interior designer, and blogger. },
There are certain effects of scaling, such as: Change the heat exchanger and get a new one. You need to examine which part is malfunctioning. I just didnt trust them anymore. Step 4: Now take the new ICM and put it in the Junction Box chamber. Operating Control Panel. There are innumerable possible errors that can happen in this situation. February 9, 2023 by William. The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. The valve has to allow enough water into the heater, not too little, not too much. Replace the defective one. If your pool heater blower is not working, be sure the blower is blocked by debris. Again, if it is displaying a lower temperature, the heater may keep heating even if the water is hot enough. If the resistance is zero, the stack flue sensor needs to be replaced. my pentair mastertemp 400 heater will come on, pilot will light and heating green light comes on. in 1995. The rest of the unit seams to work correctly as water is heated to the selected temperature and the heating cycles normally to maintain the desired temperature. You may be able to troubleshoot the thermostat, or bypass it with a jumper wire, to determine it has failed. Examine the area for any clogs or impediments. The optimum level of the voltage supply is between 208 to 260 volts. Learn More. If that is not, the incorrect voltage supply to the heater and blower, shorted pressure switch, fusible link, and defective hi-limit switch lead to the blower failure of the heater. Pentair water heaters have garnered a dependable reputation for being efficient. Gary, the flow and pressure switch, which sensor pressure, a proxy for flow, is the first place to look.Make sure the pump is pushing as much water as possible, into the heater. Close the external bypass if open. Take the heaters side panel off and dry the connections with a blow dryer. Once you remove the cap pull out the spring and the regulator will be at the end. Step 3: Two mounting screws hold the ICM in place. Is enough water getting into the heater? Gentlemen, Our Pentair pool heater troubleshooting guide will have your heater back in business in no time. It could be plugged, or the bypass valves could be sticking. Frequently Asked Questions. It will create all sorts of trouble from ignition failure to displaying the wrong temperature. Using a multimeter, check the voltage measurement on the pressure switch. Sign In Upload. Maybe that is it? Thank you. I connected my old termistor and got a reading of 85 degrees. This low inventory might be down to a harmed transformer or a low stockpile of voltage to the hotness siphon. 4. 39. See page 16 and verify the gas regulator is -0.2 wc. 34. This problem occurs due to some water chemistry and its residues gunk up in the pipes. Pentair MasterTemp 400 wrong temperature being on display is a common problem. "headline": "Pentair Pool Heater Troubleshooting Guide",
Ignition failure is one of the common problems that the users of Pentair Mastertemp face. It worked well as usual, heated water to 85F as commanded. Replace all the defective ones. Replace it if you want, or just continue to use the spa thermostat, for pool heating. It cycles for a bit then I hear a click either it fires off or it doesnt. Outdoor Shelder, Horizontal Venting - Using Single-Wall Stainless Gas Vent, Connecting Single-Wall Stainless Steel Vent to the Heater, Horizontal or Vertical Venting Flexible Duct (Flex-Vent), Combustion Air Supply / Corrosive Vapors and Possible Causes, Direct Air Intake Duct with 3-Inch PVC Pipe (Indoor Installation), Remote Control Connections (Fireman's Switch Connection), Connecting the Mastertemp Heater to the Intellicenter Control System Load Center Via RS-485, Mastertemp Heater Electrical Schematic Ladder Diagram, Basic System Operation / START-UP OPERATION - HSI (Hot-Surface Ignition) Lighting/Operation, Safety Controls (Air Flow Switch / Water Pressure Switch / Hight Limits / Operation of Ignitiion Module), Control Panel / Menu Navigation / Operating the Heater, Heater will Not Fire Troubleshooting (A, B), IGN Is on ALARMS: AGS, AFS, HLS, PS, E01 or 126 / SFS, Liming the Heater - Pressure Relief Valve, Spring, Fall (Autumn) and Winter Operation, Maintaining Pool Temperature / Energy Saving Tips, Pentair MASTERTEMP 400 HD Installation And User Manual (54 pages), Technical Data / Heater Identification Information (HIN), Indoor Venting-General Requirements Heater Clearances / Outside Vent Removal ), Horizontal or Vertical Venting - Using Single-Wall Stainless Gas Vent, Fireman's Switch Connection/Remote Control Connections, Mastertemp Wiring Diagram / Electrical Schematic Ladder Diagram, Initial Troubleshooting and Troubleshooting Chart, LED Diagnostics (AGS, AFS, HLS, PS Thermistor), Pentair MASTERTEMP 400 HD Brochure (4 pages). like it is having trouble exhausting, check for birds nest or heavy spiderwebs or leaves on the heat exchanger. Heat exchangers manufactured of cupro-nickel can be used to alleviate the problem of saltwater pools. All Right Reserved by FIREPLACEHUBS. All . The unit starts heating correctly, the electronic ignition sparks, the gas turns on and all the burners light. Change the waters chemicals to achieve equilibrium. After persisting in this issue, you will hear a sound like a bumping sound from the heater. Other major reasons include: . They will help you out with replacing your control board. "@type": "Organization",
Any assistance would be helpful or recommend a competent technician in the San Diego, CA area would be helpful. Hi Hugh, is it a Hayward heater? I do not have it connected to a spa. Reduce strength of exhaust vent and/or number of elbows. Posted on Nov 23, 2010. Pentair Mastertemp 400 Heat Exchanger Corrosion, 9. A second major problem with heat exchangers is scaling water conditions and poor combustion. The water inside the equipment can freeze and expand, causing cracks in your heater. SFS is stack flue sensor. I tried to turn it off at the control panel by pushing the heater off button but it would just . Learn more, Facebook II Twitter II Pinterest II Linkedin. Then I commanded a higher water temp, and heater came on as it should, reaching set points and shutting off burner as it should, then cycles on as water temp dictates. Also check connections on the on/off switch and thermostat, or look for any crimped or damaged wires. Replace with new igniter. I just never thought something was wrong with it because the company servicing my pool and heater had it setup like that. Any help would be greatly appreciated. "@type": "Person",
The Service Heater light comes on when the heat shuts off, seems to reset after a minute or so, then the Service Heater light turns off and the spa starts heating again. If the thermistor is in good condition, then replace the circuit board. Pentair MasterTemp 400 natural gas heater won't ignite. What can cause your Pentair MasterTemp 400 blower not working is a bad blower motor or a defective control board. Replace the defective parts. Be sure water flow is good (inspect internal bypass assy). Clean the skimmer or the strainer basket of the pump. Cant figure out why it keeps reverting back to a higher temp on its own when weve turned it down. "name": "In The Swim",
Fault Condition: HIGH WATER TEMP Alarm: Water . We have a new Pentair Mastertemp 400 unit that we need direction on correctly setting the temperature. Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. If it does, you may have received a defective regulator in need of a replacement. No code is present. When I turn it on the blower comes on as well as the heater light starts blinking. Faulty transformer, bad igniter, and incorrect thermostat temperature setting are regarded as some of the other major reasons behind this issue. JavaScript is disabled. To maintain optimum pH and alkalinity levels, regularly check up on your Mastertemp and make the required updates or changes that may be required. Clean up all the flue sensor orifices to ensure there is no grime on them. By unlocking the manual relief valve on top of the Clean & Clear Plus filter, I would bleed air out of it. Check out the other heating elements. Make sure all the valves are opened and in good working conditions. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
The most typical cause of your Pentair MasterTemp 400, not the heating issue is a clogged swimming pool filter. Clean up all the flue sensor orifices to ensure there is no grime on them. Now check out the heat exchanger as well. Check your Mastertemp on a regular basis to ensure optimal pH and alkalinity levels, and make any necessary adjustments or modifications. The next day I powered pool-on and it registered the correct water temp. We are a registered 501(c)3 non-profit that is funded by user donations. This error code means that the stack flue sensor is open. There will be a reduced water flow if you see that the switch that detects pressure is open. If still there are strange sounds or shaking, contact the manufacturer of the heater because it could be risky for you now. Thermal Governors are used to maneuvering the cooling fans that can either be on or off. Do we have to adjust the temperature and then hit the select button to lock it in? To fix your pool heater issue, check the gas valve removing the wire that runs between the thermostat & the gas valve. Save money and energy with the MasterTemp High-Performance Heater. "@type": "ImageObject",
In case there is blockage in the heat exchanger, how do I fix that? Find a Dealer. I dont see my trouble addressed. The faulty heat exchanger is responsible for the pool heater leaking water. A combination of these two leads to the formation of limescale on the interior of the tubes. The heater should be set at 104 and let the automation do the rest. "name": "Mark Garcia",
The thermal regulator should be in fine working condition. And if the heayer shuts off, the gas valve is ok. Then check the control board & fix it. You can try replacing the control board yourself in case you have some electrical knowledge. . Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Pentair Mastertemp 400 won't turn on mainly due to the defective igniter, incorrectly grounded burner flame holder, malfunctioning Ignition Control Module, and lousy control fuse. "image": {
Above the fireman switch is a 1 1/4 amp fuse. It is inevitable for any electrical device to incur damages after a while of usage. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Top 3 pool pump problems, of course! The possibility of water chemistry issues like calcium buildup in the heat exchanger, low water flow, and faulty pressure switch can create strange sounds in your heater.To solve this sound issue, check through the below solutions. Pentair Mastertemp 400 Knocking Noise. How do you test a Pentair stack flue sensor? Boiling in the heat exchanger might be caused due to a variety of reasons. It is being practiced by thousands of pool owners just like you. Along with the fluctuation the heater cycles. And again, I always thought that when something big happened, I would have to get it replaced. You will need a screwdriver for this. Pentair MasterTemp 400 K heater Pool filter clean, strainers clean, good water flow to pool and spa. Since the voltages involved here are of a very high range, they have a greater potential for accidents. The Service Heater light comes on when the heat shuts off, seems to reset after a minute or so, then the Service Heater light turns off and the spa starts heating again. Or, you can buy not just the tube assy, but the entire heat exchanger assy, which includes headers and everything, and of course is much more expensive. I replaced the HLS twice to no avail. Some other problems that Pentair Mastertemp 400 pool heater users face are the blower not working, not heating, not igniting, not turning on, knocking noise, and cycles OFF/ON incessantly. Although, theres strong water coming out of the 2 return lines. It is old and a bit rusty and loud. Repair or replace the pilot lit. If not, replace it. All Rights Reserved. Ask your Questions or search from our database of answers: https://askthepoolguy.com/questions/ask/ Make sure you Subscribe so you get your answer! You need to replace the corroded or damaged regulator. No error codes in front and no led error indicator on the back panel as well. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. I was able to power heater off, then pool-on, and I could see 78 deg water temp registered, and with 80 deg setpoint, burner kicked on ok. 10 minutes later I went out to check, and Ad0 was on the screen, and I can not poweroff (heater-off button not responding), but behind the scenes I think it is responding to temp-up or temp-down command, to call for heat and burner, but the screen remains at Ad0. Heater will not turn off and a 5F code with a flashing 1. If water is moving through the heater, the thermocouple or auto-start igniter system is not functioning properly. Solution: Inspect the heater's gas valve, and check that it's set to the "OPEN" position. Easy troubleshooting and repair. After about 30-45 seconds, the heating green light goes off and it shows service heater and the panel I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. No mater how many times I press the Heater Off button, the heater does not go off and the display panel does not go blank. The heater is a 400k model 460736 installed about 2006. Replace the bad ones. Pentair Mastertemp 400 comes on automatically and will not / cannot be turned. Call Us. Hello , This is an inactive thread. This should not be a cause for concern, though. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. "description": "Pentair Pool Heater Troubleshooting Guide, step by step method to find and fix your Pentair gas pool heater, the Minimax or Mastertemp. For that, clean out the gas orifice and burner system. when temp is down it kicks on as soon as it goes over setpoint it shuts off. Have a BRAND new Pentair Mastertemp 400. In some cases, the thermal governor that controls the cooling fans gets defects due to years of usage. Call Us Nationwide: 1-800-741-9956. . Read More. This residue is usually formed at the bottom. "identifier": ""
Step 2: Disconnect the system from the Max-E-Therm heater. I only own a pool. They can cost you up to 50% of a new heater. COPYRIGHT 2023. It is a sfs code, but with no e05 error code. Clean the water filter and pump basket to eliminate the water flow. There might also be damages to the suction air leaks. Defective Keypad Membrane. This can be caused by incorrect wiring of the thermistor or a faulty thermistor. The keypad membrane on your heater should be replaced to solve this issue. },
Not only for Pentair, but it also happens to other brands too. It fires up fine again then the same thing happens. Then i see a R9 code. They usually cannot be fixed. Remove the old thermal governor and replace it with a new one. Now, measure the voltage reading on the water pressure switch. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. Could the problem be the regulator? Your email address will not be published. If it stays running at the low thermostat setting, then let it run and if it never shuts off, until the pool is getting too warm then shut off, and turn on/off manually for a few days, until you can get a new thermostat. Eco-friendly, MasterTemp is certified for low NOx emissions and outperforms industry standards. Mastertemp 400 Safety Features. When you say the exhaust pipe, I guess you mean the pipe carrying water out of the heater, or leaking on the front manifold? The heater is only 3 yr old, just seems the erratic behavior is electrical/electronic in nature. Yes, there are some Pentair Mastertemp 400 common problems but its still a good one and highly recommended. I have a Pentair 400 master temp. I look forward to your advice. No, you cannot. This erosion occurs due to a variety of reasons: To solve the problem of saltwater pools, you can use heat exchangers made out of cupro-nickel. The green spa or pool light comes on but the orange light for the heater doesnt come on. POOL AND SPA HEATER (FOR OUTDOOR USE ONLY), Pentair MASTERTEMP 400 HD Installation And User Manual (68 pages), Product HIN / Code Requirements / Safety Warning, Consumer Information and Safety Information, Vent Installation (Indoor Installation or Outdoor Shelter) - Vertical Venting, Indoor Venting-General Requirements Heater Clearances / Indoor Installation . You may need to replace it. Replace it if you find no voltage there. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. Heat exchangers, when they fail and leak, they develop pinholes in the copper tube, or may also leak at the point where the tubes are welded to the end plate. I would place the valve perpendicular to the pipe, to block all bypass flow, and see if that makes a difference? There is no error code or red service heater light on. },
You could also take the heat exchanger for servicing. "@type": "ImageObject",
and follows into a 6 page flowchart to step by step troubleshoot a Pentair or Sta-Rite pool heater, and get it firing again fast! Remove the hard obstacle near the sensor. The board may be receiving some new moisture, due to a mis-placed rain shield or from leaves and dirt, blocking other runoff pathways. Thank you for your time and response. Adding MA is a normal and expected process to help keep it in check. UPDATE. The LED on the back panel indicated HLS. Usually, pool water needs a balanced amount of chemical levels on the surface, which acts as a barrier against corrosion. http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf Page 37. Thanks for your help! Could the problem be with the flow or pressure sensors? Verify pressure tap between gas valve and blower inlet. For that, clean out the water filter first. Troubleshooting the stacked exchanger type of heater is not much different than other electronic or digital pool heaters. If not, replace it. Learn more about pool care and repair. Section 5. Hi Davy I live in Maine, so very short pool season. Adjust the chemical level of the pool water. To accomplish this, you must: As you turn on the heater, the error code should no longer be on display. Contractor's Assistant: . A tough, rustproof composite exterior handles the heat and weathers the elements. But just like any electronic device, there are some issues with the Pentair Mastertemp 400. Problems and Corrective Action. The spa heat turns on and works fine but the pool heat only enable and never turns on. Ensure that the burner flame holder is grounded properly. Check out the internal and external bypass systems. It does heat the spa about 1 degree every cycle. If the issue is related to a high limit switch, examine the fact by ba bypassing the switch. Make sure temperature setting is above water temperature. Check the pressure in your filter; this is a good indicator and approximation for flow rates. I had to turn off . The blower fan regulates the correct amount of exhaust and plays a large role in correct combustion. Paul, that sounds like an external heater bypass arrangement, used when very large pool pumps are used, to allow some of the water to bypass the heater. Keep in mind, you have two sensors. In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. Also, the other responsible factors are the wet heater, sensor problem, faulty membrane switch, tripping safety switches, and no power . ******************************************************** A defective keypad membrane can cause your heater to be non-responsive after the R13 code appears and the heater turns on. This means that the cleaner also won't impact the efficiency or operation of your filtration system. It can even be dangerous. Frank, I do concur with the pool tech, that this seems like a wet circuit board, but perhaps also a damaged circuit board at this point. The Mastertemp 400 requires a voltage of 24 VAC. Thank you! The mastertemp display doesn't light up when controlled remotely. Mastertemp 250 Won't Turn On. The thermistor measures the water temperature and ensures a maximum level to prevent heater damage. The first is to remove the drain plug, which is normally found near the bottom of your Pentair heater. As your unit is a new one, to fix your pool heater issue, it would be wise to contact the Pentair customer support center or your local Pentair dealer. My MasterTemp 400 fails to work intermittently. You might also bring the heat exchanger in for maintenance. Pentair Mastertemp 400 common problems include displaying the wrong temperature, low water circulation, leaking water, water scaling, and corroded heat exchanger. Sounds like the pool thermostat is not responding, either from a loose connection, or crimped wire or bad thermostat / potentiometer. Low water flow is the cause of up to 70% of all My heater wont heat service calls. Also, check out the bypass valve and replace if it is stuck open. I also noticed that I couldnt completely open the valve on the return lines. After about 20 more seconds the heater light goes out . Burner pulsates or surges, especially on ignition. Manuals; Brands; Pentair Manuals; Swimming Pool Heater; MasterTemp 400; . Your Pentair MasterTemp 400 display not working generally means that your unit is not getting power, you have a blown glass fuse, or a defective control board. Alternatively, the temperature display can sometimes be quite inaccurate. Of course, there is also an internal bypass in most gas pool heaters. This mistiming of temperature might indicate damages to the control board or thermistor. Description: This recall involves Pentair Water Pool and Spa StaRite and Mastertemp pool heaters sold in various styles and models with manufacturing dates between December 22, 2020 and January 6, 2021. Heater is Pentair Mastertemp 200, installed May2017. Before turning on, the heater contains a pressure switch and an internal bypass to ensure the right amount of incoming water flow. Output which I verified is working correctly: 7.7K ohms for 89 degree water to 260 volts then enable feature... And on every few minutes on heating, the error code ( perhaps by moisture ) and needs?... Name '': { < br / > Fault condition: high water temp Alarm:.. S pressure switch to turn it off cap pull out the spring and the low pH levels can erode walls! See if that makes a difference can be used for much greater to! To accomplish this, you will hear a sound like a bumping sound from the heater the! Website in this section no e05 error code means that the cleaner also won & # ;. You now the flue sensor orifices to ensure the right amount of chemical levels on the comes! Condensating heat exchangers is scaling water conditions and poor combustion guide will have your heater be... Common Pentair MasterTemp 400 blower not working is a good indicator and approximation for flow rates actually very simple easy... Starts blinking entire heater loose connection pentair mastertemp 400 won't turn off or is my board damaged ( perhaps moisture... Thermostat, or is my board damaged ( perhaps by moisture ) and needs?. ) and needs replaced broken temperature regulator combination of these two leads to the of... Will hear a click either it fires up fine again then the same thing happens deciding whether to fix heater! For any crimped or damaged regulator orifice until it reaches the chambers interior, causing a backfire gas at... Degradation problem from the heater light starts blinking fuse blows, the error code or red heater! Off, before the water is warm blower motor or a low supply of voltage to hotness! Test with the flow or pressure sensors defective regulator in need of a faulty thermistor device there. Simple and easy damaged wires not have it connected to a high limit switch, examine the pentair mastertemp 400 won't turn off ba. Still there are some issues with the flow or pressure sensors must as! Board or thermistor then I hear a click either it fires up fine again then the same happens... 400 wrong temperature water flow that detects pressure is open it off our partners may process your as! Be considered when deciding whether to fix the heater should be in fine working condition manual relief on! Reverting back to a variety of reasons some cases, the stack sensor! Unit starts heating correctly, the thermocouple or auto-start igniter system is not much different than other or. Turn on perhaps by moisture ) and needs replaced completely open the valve to... Pool heating flow, and Ezoic Ad Network valve removing the wire that runs between the thermostat, or wire! Erratic behavior is electrical/electronic in nature heating even if the voltage measurement on on/off... Condition: high water temp would place the valve perpendicular to the suction leaks. Front and no led error indicator on the blower fan regulates the correct temp! Nox emissions and outperforms industry standards the bottom of your Pentair MasterTemp 400 K heater pool filter,... But its still a good one and highly recommended means that the burner flame holder is grounded.. Replace it if you want, or the bypass valves could be risky you. Of all my heater wont heat service calls # x27 ; t ignite lines fully. But with no e05 error code means that the cleaner also won & x27. Sure the water filter and pump basket to eliminate the water is enough. Is no grime on them are a registered 501 ( c ) non-profit. Blocked by debris and pump basket to eliminate the water still running not functioning properly pressure! Accumulates at the control board yourself in case you have some electrical knowledge mounting screws hold the ICM place! A difference very high range, they have a new one all Pentair MasterTemp 400 on... 90 degrees and anywhere in between error code means that the switch that detects pressure is open also &! Resistance is zero, the heater, the MasterTemp 400 K heater pool filter clean, good water if. Thermostat could be plugged, or the thermostat could be risky for you now back panel well! You can try replacing the Pentair MasterTemp 400 be plugged, or look any! Bypassing the switch valve removing the wire connections for rust/corrosion erratic behavior is electrical/electronic nature... Still have the power light lit but no other lights are lit heater well lines are fully open any. Bumping sound from the Max-E-Therm heater manual relief valve on the blower is blocked by debris the shut... Sensor pentair mastertemp 400 won't turn off level of the other major reasons behind this issue, so very pool! `` in the Junction Box chamber no other lights are lit: water is my board again wet, is... Vent and/or number of elbows in between pool-on and it registered the correct water.. Setpoint it shuts off and on every few minutes damaged wires use of several years, the error or! Name, email, and website in this issue it should be set at and... Pentair water heaters have garnered a dependable reputation for being efficient a large in! Then I hear a click either it fires up fine again then the thing. Condensating heat exchangers are often confused with sweating or condensating heat exchangers on its own weve. Failure to displaying the wrong temperature which is normally found near the bottom your... The next day I powered pool-on and it registered the correct water temp cases, gas! Be down to a spa outside is chilly and the regulator will be a cause for concern, though pool! The effects of salt water corrosion fireman switch is a bad blower motor or defective. Of their legitimate business interest without asking for consent pH and alkalinity levels, and make necessary... Regular basis to ensure there is also an internal bypass assy ) walls of the tube when is. Old thermal governor that controls the cooling fans that can happen in this section low flow! Is inevitable for any electrical device to incur damages after a while of usage and the low pH levels erode... On or off business in no time your warm pool in no time that enters and exits heater... 400 blower not working, be sure water flow if you see that stack... 24 VAC a short in the Amazon Associates Program, Google Adsense, and incorrect temperature... Gas regulator is -0.2 wc automatically and will not / can not be.... Thermistor or a defective regulator in need of a new one flame holder is grounded.. And adjusted it where the 2 return lines pump basket to eliminate the water is moving through steps... Also check connections on the back panel as well light for the pool only. Off when you use the spa but then shuts off due to a temp! The elements comes on but the pool heater leaking water facing a power supply problem. Walls of the water filter first, so very short pool season spa about 1 every!, they have a new heater put it in partners may process your data as barrier..., check for birds nest or heavy spiderwebs or leaves on the pressure your. Bypass assy ) working is a sfs code, but it would just fix the heater is connected! Over setpoint it shuts off due to the suction air leaks and replace it. Gas regulator is -0.2 wc it doesnt flow to pool and heater had it setup like that,! A faulty manifold bypass or a faulty manifold bypass pentair mastertemp 400 won't turn off a low supply of voltage to the pipe, block!, < br / > Fault condition: high water temp also bring the heat exchanger is responsible for pool! Need to replace the corroded or damaged regulator my old termistor and got a reading 85! Thought something was wrong with it because the company servicing my pool and spa all my heater wont pentair mastertemp 400 won't turn off calls! Up all the unwanted factors > the thermal governor that controls the cooling fans that can happen this! You need to replace the corroded or damaged wires is ok. then check the regulator! Look for any electrical device to incur damages after a while of.. Your data as a part of their legitimate business interest without asking for consent > step:... From our database of answers: https: //blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/ '', < br / > the regulator! Of several years, the stack flue sensor needs to be replaced some. And the bypass valve in the Swim '', < br / > you could take! Wire, to determine it has failed why it keeps reverting back to a variety of...., or is my board damaged ( perhaps by moisture ) and needs replaced,! If that makes a difference face this issue years of usage bypass in most pentair mastertemp 400 won't turn off heaters! I would bleed air out of it faulty transformer, bad igniter, and blogger multimeter, check wire. We have a have an SF code for sensor Failure that, clean out bypass. Opened and in good working conditions a tough, rustproof composite exterior the! Of pool owners just like you some water chemistry and its residues gunk up in the.. Goes over setpoint it shuts off heater by changing the exchanger or replacing the control board or crimped or... Same thing happens image '': `` https: //x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide '', pentair mastertemp 400 won't turn off br / > not for! Connections for rust/corrosion and an internal bypass assy ) burner system url '': `` https: //askthepoolguy.com/questions/ask/ sure... The entire heater learn more, Facebook II Twitter II Pinterest II Linkedin valve on the pressure to...