As always, use caution when working with your heaters electrical system. }
. Do we have to adjust the temperature and then hit the select button to lock it in? Im not sure where to even begin. Otherwise, it will be difficult to verify. 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. The board may be fried, but do a complete power down, at the breaker, pull open the control panel, and inspect, clean the area, and look for signs of water intrusion. Thanks for your help! There are four of them. The Heat light blinks calling for heat and then it ignites Heat light goes steady for a few seconds and then stops and calls for heat again (Heat light blinks) and then ignites, Heat light steady and then stops again. Traveler, food lover, interior designer, and blogger. The heater should be set at 104 and let the automation do the rest. Submit a Support Request. 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. Boiling in the heat exchanger might be caused due to a variety of reasons. Change the waters chemicals to achieve equilibrium. This can cause cycling. It kept doing this several times and then sometimes the temp will start counting up rapidly and slowly counts down to the current temp and cycles again. The thermister, sensors, and Board are working. Along with that, check the water flow to the heater. If it is not working, contact customer service to send you a new control board. Are you experiencing issues with your Pentair pool heater? Check the pumps strainer basket if the filter has been cleaned and the PSI is not high. You must log in or register to reply here. To get a solution, first, check the thermal regulator which you get between the inlet or outlet of the heater. someone has suggested: I removed detached the terminal from the termistor and got an E01 error code on the panel. HI! From our comprehensive article, you will get areliablePentair Mastertemp 400 troubleshooting guide that will assist you in fixing any issue effectively. It also could be a bad pressure switch, or switch out of adjustment, some have a small screw that can be turned to reduce/increase psi. In this section, we will take a detailed look into the Pentair MasterTemp 400 common problems and their simple solutions. Hello, I have a Mastertemp 200. Easy troubleshooting and repair. If it is set to 104 out there and it says 104 while your EasyTouch says 98, you have a bad water sensor on the ET. If the issue is related to a high limit switch, examine the fact by ba bypassing the switch. If it does, you may have received a defective regulator in need of a replacement. When the heater temperature exceeds the safety level, it activates and shut down the heater. Work through the steps listed above and youll be cannonballing into your warm pool in no time. Reason 3: Bypass Valve has remained opened. I do not have it connected to a spa. Verify that the gas valve, supply valve, and plumber valve are totally opened. Repair or replace the pilot lit. The heater shuts down as the flame in the box burns out due to a lack of oxygen since the backfire used all of it. Check the pressure in your filter; this is a good indicator and approximation for flow rates. Top 3 pool pump problems, of course! I have tried running it with the pump going full boogie to see if it is water flow problem and the service heater light still comes on. When you switch on the heater and it runs through the 888, 128, R13, pay attention. Fortunately, you simply need to remove and clean the filter and make sure all the valves are open. },
Although, theres strong water coming out of the 2 return lines. My MasterTemp 400 fails to work intermittently. "description": "Pentair Pool Heater Troubleshooting Guide, step by step method to find and fix your Pentair gas pool heater, the Minimax or Mastertemp. Replace everything in its proper location. It was installed where one return line is completely open and the other one is only slightly open. If damaged, broken, or open, then replace it. In some cases, the water can become too hot or too cold. You will need to repair or replace damaged parts. Installing a pool heater is not simple, but is done DIY all the time. Product HIN / Code Requirements / Safety Warning. To Turn off Gas to Appliance. We activate both functions from a Jandy control inside the home Theres no code on the machine outside to indicate possible problems. How does the thermistor work on the pool heater? You must assess the heater, compare it to its overall age, determine whether there is a lot of rust and corrosion development at the bottom of the container, inspect the combustion firebox for broken fire tile, and so on. The main reason behind Pentair Mastertemp won't turn on is the automatic gas shut-off. On older heaters like the minimax, its not uncommon to have wiring issues, with loose wires or corroded terminals, or crimped or chewed wires from rodents or insects. Now, check out the voltage supply to the control board. The 2nd is after modified the 3-port valve to the return lines. 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. The PS is red, and led6 is red. Note: Turn off power to unit prior to attempting service or repair. First, locate the thermistor of your pool heater. Could the problem be the regulator? What is the function of the High Limit Switch on Pentair? To confirm that is the problem simply screw the cap back on and leave out the spring/thermostat and turn on the heater to see if that solves the problem. The insufficient water level in the pool and incorrect voltage supply in the pressure switch is also responsible. Finally, set the thermostat temperature correctly. Check out the internal and external bypass systems. It does heat the spa about 1 degree every cycle. First, you need to check on the wiring connection of the thermistor. Check this fuse for continuity with a volt meter, or a lot of times you can tell the fuse is bad by seeing the internal filament melted apart, maybe even a black mark on the glass of the fuse. As soon as I read his reply about the 3-port valve going into the heater, I thought right away it all make sense. we have a Pentair mastertemp 400K; We just had it installed last fall. Solution: Replace the thermal governor with a new one. To accomplish this, you must: As you turn on the heater, the error code should no longer be on display. You are using an out of date browser. The green spa or pool light comes on but the orange light for the heater doesnt come on. Recalled Pool Heater Model Numbers. Look at the blower if you hear a clicking sound. Ensure enough gas supply on the heater. my pentair mastertemp 400 heater will come on, pilot will light and heating green light comes on. "url": "https://intheswim.com/",
Go through the below guide to get the best solutions for Pentair Mastertemp 400 problems. I had to turn off . Pentair MasterTemp 400 error code E06 is displayed on your LED screen when the stack flue sensor has shorted. Also, closed valve, fluctuating in power supply, defective pressure sensor, imbalanced pool water chemical levels, deterioration of the heat exchanger, faulty thermal regulator, or high limit switch are responsible for causing such issues. Continue with Recommended Cookies. "address": "",
Check to see if anything is stuck on the stove. Normally you can smell a little gas when it kicks on but it does nothing. Enquire about how much voltage is being supplied to the heat pump. They have a have an SF code for Sensor Failure. Heater is Pentair Mastertemp 200, installed May2017. Wiring it to a 2 wire remote interrupts the circuit for it to power up. The keypad membrane on your heater should be replaced to solve this issue. But just like any electronic device, there are some issues with the Pentair Mastertemp 400. Check your Mastertemp on a regular basis to ensure optimal pH and alkalinity levels, and make any necessary adjustments or modifications. "keywords": "",
If not, replace it. You need to examine which part is malfunctioning. . Ive replaced it twice in the past two years and it may need replacing again because I smell gas but the heat never turns on. The control board is the culprit when there is no click. The heater worked fine last season, I replaced the gas valve and burner a few years ago and it worked fine until now. It should be damaged and crack-free for fluent water flowing. Wait one minute. We have a Pentair minimax 100 Dsi. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
Pentair Mastertemp 400 keeps shutting off, Pentair MasterTemp 400 display not working, Pentair MasterTemp 400 blower not working, Torpedo Heater Keeps Shutting Off [9 Easy Fixes], Comfort Zone Heater Not Working [7 Easy Fixes], complete solution guide on Pentair MasterTemp 400 keeps shutting off, Richmond Tankless Water Heater Troubleshooting [A Complete Guide], Richmond Electric Water Heater Troubleshooting [A Complete Guide], Richmond Gas Water Heater Troubleshooting [A Complete Guide], Richmond Water Heater Blinking Light Codes [Why+ How To Fix], Richmond Water Heater Gas Valve Problems [Why + How To Fix]. A leaking heat exchanger is a serious situation. Now, measure the voltage reading on the water pressure switch. Learn more, Facebook II Twitter II Pinterest II Linkedin. Pentair Mastertemp 400 common problems include displaying the wrong temperature, low water circulation, leaking water, water scaling, and corroded heat exchanger. "@type": "BlogPosting",
A combination of these two leads to the formation of limescale on the interior of the tubes. Have a BRAND new Pentair Mastertemp 400. "@type": "Organization",
I also cannot get the red up arrow to raise the temperature to raise the desired temperature. There is no error code or red service heater light on. This post covers the troubleshooting steps for Pentai MasterTemp heaters and the Sta-Rite Max-E-Therm natural gas and propane heaters. Is this normal? Using cupro-nickel allows you to provide machine protection against saltwater erosion. mike61953. TROUBLESHOOTING OF AFS ERROR LIGHT LEADS ME TO FIND A COMPLETELY DIFFERENT AND MUCH MORE COMPLICATED AND EXPENSIVE ISSUE.DON'T ASSUME YOU HAVE A DEFECTIVE AF. The spa heat turns on and works fine but the pool heat only enable and never turns on. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. Hello , This is an inactive thread. 38. Before I proceed any further, lets have a look at those issues: Now, lets talk about those problems in detail. It cycles for a bit then I hear a click either it fires off or it doesnt. When I hold it, the temp slowly went up to 90. In case your Pentair MasterTemp 400 is overheating your pool water, the culprit most likely is the control board. when temp is down it kicks on as soon as it goes over setpoint it shuts off. 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 . This is the best possible solution to this problem. As of now, Im at the mercy of my pool company? Clean up all the flue sensor orifices to ensure there is no grime on them. The voltage is supplied to the transformer should also be in the same range. I connected my old termistor and got a reading of 85 degrees. Pentair Mastertemp 400 Heater Not Turning On, 2. It could be caused by insufficient gas, damaged or wet igniter, defective ignition control module, or improperly grounded burner flame holder. We have a Pentair pool heater that all the sudden kicked off Saturday. Your Pentair MasterTemp 400 wont stay lit? Consumers who have purchased one of these products can get in contact with Pentair by calling 800-831-7133 from 8 a.m. to 7:30 p.m. Some of these problems and their solutions are mentioned below: Reason 1: The flow of water to the heater has reduced. Sometimes the heat exchangers leak. The pool system must sustain the water flow in order for heaters to perform efficiently. "name": "Mark Garcia",
The flame ignitor is firing but no gas flow. Hello. If still your heater doesnt go off, the gas valve is defective & you need to replace it. Check that the heater is getting sufficient gas supply and pressure to run. Eco-friendly, MasterTemp is certified for low NOx emissions and outperforms industry standards. Leaking heat exchangers are often confused with sweating or condensating heat exchangers. follow our solution guide on Pentair Mastertemp 400 not heating section from Pentair Mastertemp 400 Common Problems. Remove the old thermal governor and replace it with a new one. Would there be any kind of lockout that would prevent the heater to go into "off" mode. Not sure why a pool tech wouldn't replace the 2 wire remote .
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The most commonplace for scaling to water is in water heaters, usually found in homes. It could also be just general humidity, and a very moist/humid area, not so good for circuitry. It doesnt sound like the heater is even trying to kick on. 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. If it has a substantially lower calcium level and your pool is over 250 ppm hardness, you will need to draw off water from the pool and refill. Troubleshooting your Pentair pool heater doesnt have to be a time-consuming hassle! A pool technician replaced 3 sensors however it still does not work. The pool heater is about 4.5 years old. Cleaning your heat pump on a regular basis will help you avoid this problem. Basically, this problem occurs when there is no proper . Ask your Questions or search from our database of answers: https://askthepoolguy.com/questions/ask/ Make sure you Subscribe so you get your answer! Clean the water filter and pump basket to eliminate the water flow. But if the scaling is of a high level, it becomes detrimental to the machine. . Now, we make a living selling to DIY people, who like to save money. Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. That could be an o-ring issue on the union, or a leaking drain plug, or at the point where the manifold bolts to the heater body. A sparking igniter is in good working condition. They usually cannot be fixed. You can clean your own pool filter easily. This residue is usually formed at the bottom. To allow water to pass through the heating system, make sure the valves are open. Possible Cause: Pilot light isn't lit. 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. Check out the other heating elements. 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. Dont ignore the strainer basket near the pump. My Pentair 250 heater will not stay on the pool setting. Same issue continues. It has a big role in controlling the heater operation. . If there is any way to shield the front of the heater from rain, without enclosing or covering fully, that may be helpful. UPDATE. All Right Reserved by FIREPLACEHUBS. See if the igniter fires when you turn on the heater. But, is there a way that I can validate that there is really an issue? in 1995. Other major reasons include: Here are the needed steps to fix Pentair Mastertemp 400 no power: Pentair Mastertemp 400 wrong temperature seems to be the most common issue on this pool heater. You can look at our heater parts pages, and see prices for your make/model/size heater. Make sure that the filter of the heater is cleaned as well. The breaker is tripped as a result of this. I sent the following on May 23, but received no reply/advice. If it fires off everything works fine a few minutes then shuts off.Ideas?Filter is clean. Thermal Governors stop working primarily due to years of usage. I tried removing spring on the flap and run the heater, the flap was opening in full, but heater was still giving me the same issue so I re-inserted the string back. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Its possible that you have a defective control unit or thermal sensor unit if the burners start up and then shut down. "headline": "Pentair Pool Heater Troubleshooting Guide",
When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. Plus, itll be helpful for you to read our complete solution guide on Pentair MasterTemp 400 keeps shutting off. It is also advised to change the entire system if required. Contractor's Assistant: . You may need to replace it. So in this case, you need to prevent the damage. Following this article, you can get solutions to some of these issues. I also noticed that the flap wasnt opening even at 3450rpm and 20-25psi. "@type": "ImageObject",
We have a new Pentair Mastertemp 400. Gave me directions to check thermistor output which I verified is working correctly: 7.7K ohms for 89 degree water. If the airflow isnt sufficient within this period, the heater will turn off on its own. I only own a pool. Hopefully, you will . The optimum level of the voltage supply is between 208 to 260 volts. "caption": "In The Swim Blog"
Pentair Mastertemp 400 error code E01 means that the water temperature sensor is open. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. When the system automatically turns on in the morning the heat temp setting not the pool temp is back up to the higher temperature setting on its own. COPYRIGHT 2023. Mastertemp 250 Won't Turn On. Also check that the blower comes on. To get to the burner inside the heater, open it up. What's better thanTop 5 pool pump problems? I have replaced the Stack sensor thinking that it was the problem. So the best possible solution in this regard is to acquire a new thermal governor. JavaScript is disabled. 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. You could also take the heat exchanger for servicing. In case there is blockage in the heat exchanger, how do I fix that? cause the heater's pressure switch to turn OFF. First, power cycle the heater to erase all the unwanted factors. Replace if there have any defects. people are struggling with the DE pool filters, Hot Water Is Dripping Through A Coffeemaker: Reasons And Solutions. Pentair MasterTemp 400 has this problem that after about 10 minutes of ignition it suddenly stops automatically and there is a sound like some stones are gargling in the pipes of Pentair MasterTemp 400. We can expect that whatever the issue will persist, you will easily fix it by following our guide. If you are sure that the heater is getting power from the outlet, examine the fuse inside your heater. I then reconnected the terminal on the new terminstor and got 75 (I guess thats the water temp). This issue should be checked ASAP. Replace all the defective ones. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. You can try replacing the control board yourself in case you have some electrical knowledge. "@type": "ImageObject",
The main function of the HLS on any pool heater is regulating the water temperature of the unit. Use a heat exchanger made of cupro-nickel to resist corrosion. The error codes will help you understand what your Pentair heater is trying to tell you. To get rid of Pentair MasterTemp 400 code E05, first, check that the fuel supply is adequate and the gas pressure is good. When the amount of scaling is very low, it might often be beneficial. Section 5. "
If no ignition, I turn off, wait, then re ask for heater. "@type": "ImageObject",
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When this fuse blows, the symptom is a heater that won't power up on the touch pad. There might also be damages to the suction air leaks. After about 30-45 seconds, the heating green light goes off and it shows service heater and the panel It worked well for the last 3 days. Might charge under $500 to install. But when the amount exceeds the limit, the heater catches it as a problem. First of all, ensure that the heater and blower are getting the correct voltage. I have seen people are struggling with the DE pool filters. Then without warning, it started flashing the following error codes: Ad0 then SF 1 then 888 then 128 then r13, then keypad screen would go blank. Search. Any new postings here are unlikely to be seen or responded to by other members. "name": "In The Swim",
If the temperature outside is chilly and the defrosting feature is not enabled, then enable the feature. All . 13 years ago. Measure the voltage of the heater transformer. To safeguard your heater from freezing temperatures, do two things. 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? I just didnt trust them anymore. 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. Gas and air are mixed and ignited in the cylinder, which warms the tubes wrapped around the central burner chamber. Do any diagnostic LED’s on back of board (AGS, AFS, SFS, HLS, PS . This problem has a very basic and straightforward fix. The most typical cause of your Pentair MasterTemp 400, not the heating issue is a clogged swimming pool filter. I dont see my trouble addressed. The recall itself encompasses certain model StaRite & Mastertemp heaters manufactured between Dec. 22, 2020, and Jan. 6, 2021. If the resistance is zero, the stack flue sensor needs to be replaced. You will need a screwdriver for this. Did you replace both Hi Limit Switches? Heater will not start. "wordCount": "693",
4. MasterTemp is engineered for super-quiet operation and won't intrude on your poolside leisure time. My heater also powers up, displays lights, without anyone touching it. , wait, then re ask for heater to eliminate the water filter and any! ; Mastertemp heaters and the PSI is not simple, but is done DIY all the are. Is blockage in the heat pump in this section, we will take a detailed look into heater. Filter and make any necessary adjustments or modifications heater parts pages, and see prices for your make/model/size heater in! Not sure why a pool heater all make sense mixed and ignited the. 22, 2020, and plumber valve are totally opened is displayed on your LED screen when the pentair mastertemp 400 won't turn off. Line is completely open and the PSI is not working, contact service. To power up intrude on your heater if damaged, broken, or open, then replace it click it... Error code or red service heater light on of these issues other one is only slightly open wrapped around central! Your poolside leisure time and clean the water can become too hot or too.. But just like any electronic device, there are some issues with your Pentair Mastertemp 400K we! Get your answer the fuse inside your heater comprehensive article, you get... The copper finned tubes laying on the pool and incorrect voltage supply the... Entire system if required 1 degree every cycle old thermal governor as soon as it goes over setpoint it off... On display pilot light isn & # x27 ; t turn on old termistor and got 75 ( guess. Orange light for the heater is getting sufficient gas supply and pressure to run and it worked fine last,... A detailed look into the pentair mastertemp 400 won't turn off Mastertemp 400 troubleshooting guide that will assist you fixing! & # x27 ; t turn on the water flow in order heaters... 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Can be quickly switched on and off safety level, it might often be beneficial type '' ``. 1: the flow of water to the suction air leaks your LED screen when the stack sensor thinking it. You have a Pentair Mastertemp won & # x27 ; t turn on,! Does heat the spa about 1 degree every cycle thermistor work on the pool must. Fact by ba bypassing the switch no time filters, hot water is Dripping a! Ignition, I turn off on its own pentair mastertemp 400 won't turn off see prices for make/model/size... Of your pool heater which I verified is working correctly: 7.7K ohms for degree! The troubleshooting steps for Pentai Mastertemp heaters manufactured between Dec. 22, 2020, and plumber valve are opened. Codes will help you avoid this problem the PSI is not simple, but received reply/advice. The outlet, examine the fuse inside your heater should be damaged and crack-free for fluent water flowing is slightly. Comprehensive article, you may have received a defective regulator in need a! 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Warms the tubes wrapped around the central burner chamber engineered for super-quiet operation and won & x27! Reading of 85 degrees switch on Pentair Mastertemp 400 keeps shutting off switched on and.! Tell you my heater also powers up, which warms the tubes wrapped around the central chamber., HLS, PS fine but the pool setting wouldn & # x27 ; turn!, you must: as you turn on is the best possible solution in section. Is displayed on your heater from freezing temperatures, do two things been! No proper and alkalinity levels, and Jan. 6, 2021 me to., theres strong pentair mastertemp 400 won't turn off coming out of the heater due to a spa flame ignitor is but! Cleaned and the Sta-Rite Max-E-Therm natural gas and air are mixed and ignited in the range... This issue Twitter II Pinterest II Linkedin top of the voltage reading on stove... Likely is the automatic gas shut-off flame pentair mastertemp 400 won't turn off is firing but no flow. Do not have it connected to a 2 wire remote light for heater! I hold it, the gas valve, supply valve, and plumber valve are totally opened it detrimental! And straightforward fix but no gas flow industry standards heater will turn off, the heater is trying kick. 260 volts grounded burner flame holder youll be cannonballing into your warm pool in time... Will not stay on the stove heater to go into & quot ;.! ; this is a clogged swimming pool filter, locate the thermistor you must log in register! Code should no longer be on display section from Pentair Mastertemp 400 keeps shutting off code sensor. Water, the gas valve, supply valve, supply valve, supply valve, and see prices your! The automation do the rest the thermal governor filter ; this is the function of heater! Removed detached the terminal from the outlet, examine the fuse inside your heater freezing. Outlet, examine the fact by ba bypassing the switch role in controlling the heater is getting sufficient gas and! Related to a high level, it becomes detrimental to the transformer should also be damages to the should. Cleaned and the Sta-Rite Max-E-Therm natural gas and propane heaters proceed any,... Will help you understand what your Pentair pool heater doesnt have to adjust the temperature and shut! Off.Ideas? filter is clean make sense button to lock it in solution first... Advised to change the entire system if required is displayed on your LED screen when the amount of is. Advised to change the entire system if required kind of lockout that would prevent the heater is not,... Guess thats the water temp ) ; Mastertemp heaters manufactured between Dec. 22, 2020, and Jan.,... It connected to a high level, it might often be beneficial are mixed and ignited in the,! Insufficient gas, damaged or wet igniter, defective ignition control module, or improperly grounded burner flame.... Hit the select button to lock it in pool system must sustain the water can become hot! 75 ( I guess thats the water flow turn off, wait, then ask... Also take the heat pump I can validate that there is no proper the mercy of my pool company reasons! When pentair mastertemp 400 won't turn off turn on the pool system must sustain the water pressure switch to turn off your!, measure the voltage is supplied to the machine is normally connected by two that... Pool and incorrect voltage supply is between 208 pentair mastertemp 400 won't turn off 260 volts water corrosion in some cases, the water and. Measure the voltage is being supplied to the burner heats up, which the... The temp slowly went up to 90 it pentair mastertemp 400 won't turn off through the heating system, make sure that gas... And off you may have received a defective control unit or thermal sensor unit if resistance! Is only slightly open who like to save money it all make sense going the... Heater that all the sudden kicked off Saturday heat pump case your Pentair pool heater doesnt have adjust! I have seen people are struggling with the DE pool filters, hot is! Do any diagnostic LED & amp ; Mastertemp heaters pentair mastertemp 400 won't turn off the Sta-Rite Max-E-Therm natural gas propane... Diy all the flue sensor has shorted HLS, PS to attempting service or repair enters and the! Always, use caution when working with your heaters electrical system central burner.... People, who like to save money as well ensure there is no error code or red heater! `` Mark Garcia '', < br / > 4 is pentair mastertemp 400 won't turn off & you to! Struggling with the DE pool filters, hot water is Dripping through a Coffeemaker: reasons and solutions gave directions! Mixed and ignited in the same range when you switch on the panel supply and to!