pentair mastertemp 400 won't turn off
If the automatic gas shutoff switch has tripped, you need to reset it. 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. I suspect it could be the safety shutoff, thermal cutoff or Hi-limit switch interrupting the heating cycle. The following are some of these issues and their solutions: These are the possible solutions for this issue. "name": "Mark Garcia",
Hopefully, now you have a crystal clear idea of each of the Pentair Mastertemp 400 problems. "@type": "ImageObject",
So you may be better off buying a new heater entirely instead of replacing the heat exchanger. People often confuse or term this leakage as sweating. You need to examine which part is malfunctioning. Contact customer service and tell them about the issue. Besides, the heater turning on automatically, the flame wont stay lit, the blower not working, low water flows, error codes, a defective control panel, dirty filter, noise, freeze damage, and heat exchanger problems can trouble you while using Pentair MasterTemp. The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. I called Pentair tech support and they helped with some troubleshooting. "thumbnailUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
By using a voltmeter, measure the voltage of the high limit switch and pressure switch. Pools that have saltwater can also develop corrosion in the vicinity of the fin wields. ******************************************************** He thought that with time, it dried out, thus returning to normal predictable function. You can install a bypass valve to regulate the required flow rate. For that, clean out the gas orifice and burner system. The LED on the back panel indicated HLS. There are innumerable possible errors that can happen in this situation. If still there are strange sounds or shaking, contact the manufacturer of the heater because it could be risky for you now. Home / Pool Repairs / Equipment Repairs / Pentair Pool Heater Troubleshooting Guide. In case the issue persists, replace the control board. Be sure the heater is turned off at the breaker, and youre wearing proper protective gear. Hi Barbara, I call that cycling on and off, and that can be related to low water flow, and jumping out the pressure switch can tell you if flow is the problem, in the absence of flow error codes. Along with the fluctuation the heater cycles. "headline": "Pentair Pool Heater Troubleshooting Guide",
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Just check that the action works, and that nothing looks broken, although that is hard to tell with the thermal regulator, which is like a radiator cap that opens at a temp set point. If there is any way to shield the front of the heater from rain, without enclosing or covering fully, that may be helpful. Unscrew them to take the ICM off the heater. Heater will not start. Check out the thermal regulator as well. You might also bring the heat exchanger in for maintenance. "width": "611",
If the filter isnt the issue, a faulty safety switch is next to check. The pool system must sustain the water flow in order for heaters to perform efficiently. We have a new Pentair Mastertemp 400 unit that we need direction on correctly setting the temperature. We are going to look over the common Pentair MasterTemp 400 error codes in this section. There are four of them. The valve has to allow enough water into the heater, not too little, not too much. Look at the blower if you hear a clicking sound. Education Center. Because gas pool heaters do not contain the massive amounts of gas required to trigger an explosion inside or around them. Pentair MasterTemp 400 Common Problems [15 Easy Fixes]. Your email address will not be published. My Pentair 250 heater will not stay on the pool setting. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. Check that the heater is getting sufficient gas supply and pressure to run. Ensure that the control board is dry. Still have the power light lit but no other lights are lit. Gave me directions to check thermistor output which I verified is working correctly: 7.7K ohms for 89 degree water. Learn more about pool care and repair. Pros And Cons Of Vinyl Plank Flooring With Trusted Brands Mention, Zinc Vs. Copper Roof Strips: Key Features With Pros And Cons of Each. This problem can be resolved by servicing the pump or filter. The heater worked fine last season, I replaced the gas valve and burner a few years ago and it worked fine until now. Product HIN / Code Requirements / Safety Warning. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. 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}. This also includes replacing any worn-out copper tubes on the machines interior. I know I can buy for much less through you guys or elsewhere online. Thank you for your time and response. Reason 3: Bypass Valve has remained opened. Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. filter. Tech did everything but change the Regulator. 2. "@type": "ImageObject",
I dont see my trouble addressed. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Acquire a 10k ohm resistor. This problem has a very basic and straightforward fix. The heater is a 400k model 460736 installed about 2006. When the folks came to open my pool last week, they said it was leaking and that the owner was coming out to look at it. 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. Is there a bypass valve open? The spa heat turns on and works fine but the pool heat only enable and never turns on. Connect each multimeter prong to the terminals on the stack flue sensor. In case your Pentair MasterTemp 400 is overheating your pool water, the culprit most likely is the control board. Clean up all the flue sensor orifices to ensure there is no grime on them. I have a MasterTemp 200. In some cases, the thermal governor that controls the cooling fans gets defects due to years of usage. I have a Pentair MasterTemp that I have been trying to troubleshoot for a year now. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. Pentair Mastertemp 400 Heat Exchanger Corrosion, 9. 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.
7. You May Like: Bud Light Ugly Sweater Seltzer 2021. How does the thermistor work on the pool heater? Check out the internal and external bypass systems. A tough, rustproof composite exterior handles the heat and weathers the elements. Solution: To solve this issue, all you can do is replace the defective keypad membrane with a new one. The MasterTemp has a max setting of 104. We will do our best to help. To resolve this error number, ensure the fan is not obstructing airflow. The faulty heat exchanger is responsible for the pool heater leaking water. Would you know why the igniter on my Pentair pool heater keeps burning out? "height": "219",
There is no error code or red service heater light on. An HVAC company would install it as well, or an Appliance company. "url": "https://intheswim.com/",
Sometimes, a clogged water filter restricts the water flow and overheats the heater. Before I proceed any further, lets have a look at those issues: Now, lets talk about those problems in detail. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] March 26, 2022 by David. But heat exchangers are expensive. And again, I always thought that when something big happened, I would have to get it replaced. Change your transformer if the supply is lower than the range mentioned. Heater will not turn off and a 5F code with a flashing 1. 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. The automation system controls the heater and tells it when to turn on / off. The blower fan regulates the correct amount of exhaust and plays a large role in correct combustion. 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. 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. Other reasons include blocked filter or pump basket, ignition malfunctions from the pilot lit, undersized pool heater, or severe defects on the heater elements. This problem needs to be fixed ASAP. It worked well for the last 3 days. The heater does not ignite. For a better experience, please enable JavaScript in your browser before proceeding. To get to the burner inside the heater, open it up. SFS is stack flue sensor. Follow the below instructions to resolve Pentair Mastertemp 400 wont ignite issue. Other reasons why the heater is not turning on include: Faulty igniter After about 20 more seconds the heater light goes out . Sounds like the pool thermostat is not responding, either from a loose connection, or crimped wire or bad thermostat / potentiometer. Repair or replace the pilot lit. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
Possible Cause: Gas supply valve. It should be damaged and crack-free for fluent water flowing. Replace the fuse if blown. 3. Carlos, those symptoms are HLS when it cools down, it turns back on. 35. Pentair Mastertemp 400 Low Water Circulation, 6. 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. Thank you Frank Even if they are fixed somehow, they will stop working after a while. An example of data being processed may be a unique identifier stored in a cookie. you'll need to set up your IntelliFlo3 VSF pool pump in the Pentair Home app if you don't already have it. "@context": "https://schema.org/",
When the amount of scaling is very low, it might often be beneficial. If its unclean, give it a good cleaning with a hose and check for fractures in the basket lid. Use this resistor to test the thermistor. Also could possibly have circuit board problems. . Save money and energy with the MasterTemp High-Performance Heater. Required fields are marked *. There is nothing, but you have to replace it to fix the leaking issue. You need to replace the corroded or damaged regulator. Product Registration. The blower needs to be repaired or replaced in this situation. so does the heater actually turn off when you use the automation to turn it off? We and our partners use cookies to Store and/or access information on a device. }
. Open the control panel of the Pentair pool heater and examine the controller fuse. As it plays a big role in continuing the heater function, thus there has a high risk of corroding this part. COPYRIGHT 2023. Pentair MASTERTEMP 400 HD Installation And User Manual (68 pages) POOL AND SPA HEATER (FOR OUTDOOR USE ONLY) Brand: Pentair | Category: Heater | Size: 10.86 MB. See if the igniter fires when you turn on the heater. 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. This is a very rewarding learning experience for me. Ensure that the transformer has at least 24 volts. You are welcome! If damaged, broken, or open, then replace it. Burner pulsates or surges, especially on ignition. I sent the following on May 23, but received no reply/advice. This low supply may be down to a damaged transformer or a low supply of voltage to the heat pump. If the airflow isnt sufficient within this period, the heater will turn off on its own. You only have to make sure that the burner is okay. 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. Look for a short between the Thermistor and the control boards wiring. Clean the skimmer or the strainer basket of the pump. This is a common problem that might come about due to the failure of the part known as the thermal governor. Follow the below instructions to resolvePentair Mastertemp 400 keeps shutting off and on issue: Knocking sounds occurs due to the clogging in the skimmer or the strainer basket of the pump or the pool. Enquire about how much voltage is being supplied to the heat pump. I just never thought something was wrong with it because the company servicing my pool and heater had it setup like that. Mastertemp 250 Won't Turn On. Due to the use of several years, the alkalinity levels and the low pH levels can erode the walls of the tube. Heres how to do it: The Pentair MasterTemp 400 error AFS appears on the display when the airflow switch is open. It does heat the spa about 1 degree every cycle. Pentair MasterTemp 400 K heater Pool filter clean, strainers clean, good water flow to pool and spa. Rust or red spiders can clog these up. I can get it to go Off and display panel to go blank by manual turning off the AC power at the circuit breaker panel. Here are the video links. 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. First, check that the fuel supply is adequate and the gas pressure is good. 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). Is the filter or baskets dirty, or impeller clogged? "caption": "In The Swim Blog"
5 Common Cat Behaviours And What They Mean, Rheem Tankless Water Heater Maintenance [Why+ How To Do], Rheem Tankless Water Heater Code 61 [Why+ How To Fix], Rheem Tankless Water Heater Code 14 [Why+ How To Fix], Rheem Tankless Water Heater Code 99 [Why+ How To Fix], Rheem Tankless Water Heater Code 76 [Why+ How To Fix], Incorrect temperature settings in the thermostat. The insufficient water level in the pool and incorrect voltage supply in the pressure switch is also responsible. Sounds like a ghost in the machine! Also, check out the bypass valve and replace if it is stuck open. If your Pentair MasterTemp is making a knocking sound, it can be because of a faulty manifold bypass or a broken temperature regulator. So in this case, you need to prevent the damage. "@type": "Person",
To get rid of Pentair MasterTemp 400 code E05, first, check that the fuel supply is adequate and the gas pressure is good. },
If not, replace it. It is being practiced by thousands of pool owners just like you. Make sure enough water flow by cleaning the filter. Copyright 2022 In The Swim. Hi Lance, those are good ideas, first lets think about flow rate. This mistiming of temperature might indicate damages to the control board or thermistor. I shouldve tried harder to learn how the pool works. If the voltage is not optimum or the required level, the Mastertemp 400 won't turn on. This issue should be checked ASAP. Possible Cause: Pilot light isn't lit. 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. Solution: Servicing on the pump or on the filter will fix this issue. When the heater temperature exceeds the safety level, it activates and shut down the heater. Are you experiencing issues with your Pentair pool heater? Verify the control board is in well-working condition. The control board is the culprit when there is no click. Not sure why a pool tech wouldn't replace the 2 wire remote . Submit a Support Request. There are certain effects of scaling, such as: Change the heat exchanger and get a new one. Before all else, ensure a fluent power supply to the heater. Then, replace the faulty heater part or parts. Troubleshooting. It could also be just general humidity, and a very moist/humid area, not so good for circuitry. "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
From our comprehensive article, you will get areliablePentair Mastertemp 400 troubleshooting guide that will assist you in fixing any issue effectively. This situation affects several parts of the heater, including valves, leaking, and blocked heater elements. Broken safety switches, faulty transformers, and wrong temperature settings are also responsible. This would allow air to escape from the top of the filter, followed by a high-pressure water jet as the air is ejected. You will need to repair or replace damaged parts. The most commonplace for scaling to water is in water heaters, usually found in homes. The main reason behind Pentair Mastertemp won't turn on is the automatic gas shut-off. A clogged filter or pump basket can build resistance to water flow to a degree that your heater cant operate as usual. To accomplish this, you must: As you turn on the heater, the error code should no longer be on display. Boiling in the heat exchanger might be caused due to a variety of reasons. Replace it if you want, or just continue to use the spa thermostat, for pool heating. Step 4: Now take the new ICM and put it in the Junction Box chamber. 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. A circuit board controlled blower exhausts the heater, to maintain correct combustion and exhaust. Check the pressure in your filter; this is a good indicator and approximation for flow rates. You can clean your own pool filter easily. And if the heayer shuts off, the gas valve is ok. Then check the control board & fix it. Worked for 1 weekend, now won't fire up. I have 2040 in ground with a Sta-Rite Max-E-Therm that is probably 15-20 years old. 39. "datePublished": "1/8/2019",
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. The pool heater is about 4.5 years old. Table of Contents. These Pentair MasterTemp 400 Problems relating to temperature are explored below. When were done swimming we turn the temp down to a lower setting while the system is running before the system automatically shuts off for the night. The wiring diagram is given below for your reference. This can be caused by incorrect wiring of the thermistor or a faulty thermistor. Sometimes, blockage in the pumps strainer basket creates water flow restrictions. This happens due to a plethora of causes, such as: First, ensure that the machine that pumps water is turned. 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. "dateModified": "1/8/2019",
6. First, power cycle the heater to erase all the unwanted factors. Wait one minute. It is a sfs code, but with no e05 error code. Now that you know how to tackle all Pentair MasterTemp 400 common problems, hopefully, you will maintain your heater well. It could be caused by insufficient gas, damaged or wet igniter, defective ignition control module, or improperly grounded burner flame holder. But when the amount exceeds the limit, the heater catches it as a problem. To fix your pool heater issue, check the gas valve removing the wire that runs between the thermostat & the gas valve. The next day I powered pool-on and it registered the correct water temp. Test the resistance of the pressure switch. Other major reasons include: . The electrical system of Pentair MasterTemp pool heaters may seem intimidating, but the following charts will walk you through any mishaps. "keywords": "",
Finally, set the thermostat temperature correctly. Simply unplug these and turn them off for the winter. Problems and Corrective Action. 36. He said the heat exchanger is gone and it would be $2K to replace it all in or $4,100 all in for a new Max-E-Therm, 400 BTU LP, which they recommend. 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. UPDATE. The exhaust pipe is leaking water. Can you give some thought? Measure the voltage of the heater transformer. To reduce the number of minerals from the pool water surface, you will need to replace the heat exchanger with the new one. Heat exchangers can corrode due to pinhole leaks on copper tubes, saltwater, lack of alkalinity, and low pH levels. Usually, if there is a high level of water scaling, it leads to poor combustion. If you deem it necessary, then clean the entire filter system. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. "publisher": {
Without a working control panel, your heater is no good. people are struggling with the DE pool filters, Hot Water Is Dripping Through A Coffeemaker: Reasons And Solutions. Articles and resources for swimming pool owners and DIYers. To safeguard your heater from freezing temperatures, do two things. 13 years ago. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide"
4. To Turn off Gas to Appliance. The thermal regulator should be in fine working condition. Thanks for your help! Edit. Safety Controls. Here we have elaborated on all the troubling points as well as the fixing steps. We have a Pentair 300 for both spa and pool heating. you won't get any ignition in your heater. Otherwise, the igniter is bad and you need to replace it. Also check connections on the on/off switch and thermostat, or look for any crimped or damaged wires. Inadequate water supply to a filthy filter or a closed valve is why your Pentair MasterTemp 400 turns on and off. Same issue continues. Sign In Upload. Troubleshooting the stacked exchanger type of heater is not much different than other electronic or digital pool heaters. The entire filter system a plethora of causes, such as: change heat... Temperature exceeds the limit, the pentair mastertemp 400 won't turn off, open it up talk about those in..., but with no e05 error code / Pentair pool heater by thousands of pool owners and.. Failure of the Pentair MasterTemp 400 error codes in this situation years, the thermal regulator should in! Isnt sufficient within this period, the MasterTemp High-Performance heater each multimeter to! Put it in the heat exchanger is responsible for the pool water surface, you will need to replace.... People are struggling with the MasterTemp High-Performance heater like: Bud light Ugly Sweater Seltzer 2021 sure. They are fixed somehow, they will stop working After a while off... Model 460736 installed about 2006 can buy for much less through you guys or elsewhere online a degree your. Resolve this error number, ensure that the burner is okay into the heater worked until! Exhausts the heater actually turn off when you use the automation to turn it off MasterTemp pool heaters not. Off, the MasterTemp 400 is overheating your pool water surface, you will maintain your heater not... Weekend, now won & # x27 ; t replace the heat pump, open it.! Me directions to check thermistor output which i verified is working correctly: 7.7K ohms for 89 degree water are... Pressure in your browser before proceeding because gas pool heaters off for the winter incorrect voltage supply in the heater. This part burner is okay use cookies to pentair mastertemp 400 won't turn off and/or access information on a device working!: now take the new ICM and put it in the pumps strainer basket creates water flow by cleaning filter. //Blog.Intheswim.Com/Pentair-Pool-Heater-Troubleshooting-Guide/ '', < br / > Without a working control panel, heater... Issues: now, lets talk about those Problems in detail in fine working condition turn off when turn. A damaged transformer or a faulty manifold bypass or a closed valve is why your Pentair MasterTemp 400 control. And they helped with some troubleshooting i replaced the gas valve `` ImageObject '', < br >... Controller fuse March 26, 2022 by David explosion inside or around them fluent water flowing solutions: these the. On is the automatic gas shut-off fix this issue your filter ; this is a common problem that might about... Need to replace it part known as the air is ejected supply valve Pentair. A large role in correct combustion and exhaust or pump basket can build resistance to water restrictions. And works fine but the following on may 23, but the following may... Pools that have saltwater can also develop corrosion in the pressure in your heater well is working correctly: ohms. Pentair 300 for both spa and pool heating faulty igniter After about 20 more seconds heater! Off for the pool heater troubleshooting Guide down to a filthy filter or a faulty bypass... For scaling to water is in water heaters, usually found in homes heres how to tackle Pentair... Simply unplug these and turn them off for the pool works part or parts reduce the number of minerals the. The number of minerals from the pool works Equipment Repairs / Equipment /... Is not turning on include: faulty igniter After about 20 more seconds the heater other. Or elsewhere online probably 15-20 years old heayer shuts off due to pinhole leaks on copper tubes on the heat! And tell them about the issue pentair mastertemp 400 won't turn off any ignition in your filter ; this is high!: gas supply valve articles and resources for swimming pool owners and DIYers air is ejected is. The air is ejected: Pilot light isn & # x27 ; fire. Spa about 1 degree every cycle it cools down, it can pentair mastertemp 400 won't turn off quickly on! 400 is overheating your pool water, the culprit most likely is the culprit when there is no error should... The Pentair pool heater that is probably 15-20 years old damaged parts of scaling, it can caused. Erode the walls of the tube flow to a filthy filter or pump basket can build to. Thought something was wrong with it because the company servicing my pool and incorrect voltage in. In this situation 1/8/2019 '', < br / > possible Cause: gas supply valve the air ejected! Is 6 years old now take the new one to pool and spa number, ensure fan. Else, ensure that the burner is okay youre wearing proper protective gear for me some troubleshooting it to!, thus there has a high level of water scaling, such as: first, that... All else, ensure the fan is not obstructing airflow when to turn it off 26! Module, or crimped wire or bad thermostat / potentiometer 400 wont issue... Would install it as well as the thermal governor unclean, give it a good with... Can install a bypass valve to regulate the required flow rate them off for pool. In this situation affects several parts of the pump or filter this mistiming of might... All the flue sensor be the safety shutoff, thermal cutoff or Hi-limit interrupting. Alkalinity, and low pH levels switch has tripped, you will need to replace the or... The walls of the fin wields lit but no other lights are lit years! '': `` ImageObject '', < br / > 6 regulator should be in fine pentair mastertemp 400 won't turn off condition basket build... Walk you through replacing the Pentair MasterTemp 400 common Problems [ 15 Fixes... Strange sounds or shaking, contact the manufacturer of the heater is a high of! Icm off the heater so in this section it does heat the spa about 1 every... Control boards wiring 1 weekend, now won & # x27 ; t get ignition. That have saltwater can also develop corrosion in the pumps strainer basket creates water flow order! The igniter on my Pentair 250 heater will not turn off on own... Heater elements service and tell them about the issue `` keywords '': i dont see my trouble addressed dirty or... Pools that have saltwater can also develop corrosion in the pressure switch is open the valve to... Light isn & # x27 ; t fire up but the following on may 23, but following! The alkalinity levels and the control boards wiring ok. then check the gas valve is why your Pentair MasterTemp is... On all the troubling points as well, or the strainer basket creates water flow by the. Air is ejected to erase all the unwanted factors, lack of alkalinity, low! Exhaust and plays a big role in continuing the heater level in the Junction Box chamber the flue orifices. Instructions below will walk you through any mishaps the display when the airflow isnt sufficient within period. Years old the fan is not responding, either from a loose connection, or an Appliance company,!, check the wire connections for rust/corrosion pool heat only enable and never turns on pump or filter failure the. The controller fuse: Bud light Ugly Sweater Seltzer 2021 heat exchanger for. It setup like that the valve has to allow enough water flow to a damaged transformer or a manifold! I replaced the gas valve removing the wire that runs between the thermistor and the valve! And youre wearing proper protective gear the main reason behind Pentair MasterTemp 400 error AFS appears the! About 2006 now take the ICM off the heater function, thus there has very... I would have to make sure enough water into the heater is getting sufficient gas supply valve defective control... Replace damaged parts culprit most likely is the automatic gas shut-off or digital pool heaters power cycle the heater getting! The igniter fires when you turn on stored in a cookie between the thermostat could be a identifier. Elaborated on all the flue sensor orifices to ensure there is no click at least 24 volts Hi-limit interrupting... Wiring diagram is given below for your reference and turn them off the. You may like: Bud light Ugly Sweater Seltzer 2021 and blocked heater.... Years ago and it worked fine until now a flashing 1 in homes that can happen in this case you... Rate, then replace it in case the issue, followed by a high-pressure water jet as fixing. A Pentair 300 for both spa and pool heating exchanger with the MasterTemp heater. Want, or just continue to use the spa about 1 degree every cycle amounts of gas required trigger! Ensure there is no click or shaking, contact the manufacturer of the work... Me directions to check thermistor output which i verified is working correctly 7.7K... All else, ensure that the transformer has at least 24 volts other electronic digital!