pentair mastertemp 400 won't turn off

Beyond that, look thru this troubleshooting guide and consult your pool heater owners manual, as I cannot troubleshoot your heater from here. If your heater is shaking, be sure that there is a problem with the heat exchanger. Read More. 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. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Solution: To solve this issue, all you can do is replace the defective keypad membrane with a new one. 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. Assuming the voltage isn't ideal or the necessary level, the Mastertemp 400 won't turn on. After persisting in this issue, you will hear a sound like a bumping sound from the heater. A local pool service expert suspected the electronic control board may have gotten wet (we have had a good deal of rain here in northeast ohio recently) thus the odd error messages that I can not find in the owners manual. Combustion appears normal, but the flame does not stay lit. Hi Peter, when he says the heat exchanger is shot, he must mean that the copper tubes are leaking water, caused by erosion and corrosion from high water pressure or low pH and alkalinity, over many years. Thanks for your help! 4. In some cases, the water can become too hot or too cold. To get rid of Pentair MasterTemp 400 code E05, first, check that the fuel supply is adequate and the gas pressure is good. "description": "Pentair Pool Heater Troubleshooting Guide, step by step method to find and fix your Pentair gas pool heater, the Minimax or Mastertemp. "author": {
To troubleshoot each of the above issues, the user needs a quick working solution guide. A thermistor is mainly regarded as a temperature sensor. We and our partners use cookies to Store and/or access information on a device. Verify the control board is in well-working condition. Glitches in the power supply are the root reason behind this. I let it run and the temp slowly went up from 74 to 77 in just an hour without stopping. It may not display this or other websites correctly. Pentair Mastertemp 400 comes on automatically and will not / cannot be turned. I then reconnected the terminal on the new terminstor and got 75 (I guess thats the water temp). Clean the clogged water filter to ensure a fluent water flow. I had to turn off . Along with the fluctuation the heater cycles. 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. Is the filter or baskets dirty, or impeller clogged? If still your heater doesnt go off, the gas valve is defective & you need to replace it. To get a solution, first, check the thermal regulator which you get between the inlet or outlet of the heater. "logo": {
Alternatively, the temperature display can sometimes be quite inaccurate. The recall itself encompasses certain model StaRite & Mastertemp heaters manufactured between Dec. 22, 2020, and Jan. 6, 2021. Look at the blower if you hear a clicking sound. Thank you! We are always ready for your assistance. The unit starts heating correctly, the electronic ignition sparks, the gas turns on and all the burners light. Eco-friendly, MasterTemp is certified for low NOx emissions and outperforms industry standards. First, locate the thermistor of your pool heater. "address": "",
If your heater is creating a sound like shaking, cleaning the complete heater unit is a must. Burner pulsates or surges, especially on ignition. Because gas pool heaters do not contain the massive amounts of gas required to trigger an explosion inside or around them. Check out the other heating elements. Is enough water getting into the heater? when temp is down it kicks on as soon as it goes over setpoint it shuts off. After long usage of the thermal governor stops working permanently, thus it cant be fixed by any means. First, you need to check on the wiring connection of the thermistor. mike61953. 38. Otherwise, your control board is most likely to be blamed. Clean out the filter first to resolve the low water flow issue. Thank you Frank If needed, hire or call a dealer to check it for you or take advice on necessary precautions or methods. Leaking heat exchangers are often confused with sweating or condensating heat exchangers. Have a pentair minimax heater, spa heater turns on for a few seconds then goes off, fan is on, blower is on, when heater fires I do smell gas and the air is hot. Watching this video will give you more insight into how to clean up your Pentair heater filter efficiently. Would this be caused by too high of a gas/air mixture? The valve has to allow enough water into the heater, not too little, not too much. 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). So, was going to need to be replaced at some point. If you agree, which device is the most likely to fail and how does one test it. If damaged, broken, or open, then replace it. Inaccurate Temperature Control or Display. Hi,e repl Connect each multimeter prong to the terminals on the stack flue sensor. So you could save $1000 by buying online and having a company install. Its a fun combination of plumbing, wiring and gas. 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.. COPYRIGHT 2023. The heater does not ignite. The most crucial thing to remember is that the sensor is in good working order. February 9, 2023 by William. Make sure temperature setting is above water temperature. Im so glad I didnt have to buy additional parts. Otherwise, it will be difficult to verify. Be sure all connections are clean and tight. This issue should be checked ASAP. Its possible that you have a defective control unit or thermal sensor unit if the burners start up and then shut down. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. 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. Here we have elaborated on all the troubling points as well as the fixing steps. Pentair Mastertemp 400 error code E01 means that the water temperature sensor is open. 7. Learn more about pool care and repair. Hello, I have a Mastertemp 200. https://w. Check for stuck objects, such as worms, dirt, lint traps, etc. A clogged pool filter or pump basket will prevent water from flowing freely, so make sure its all clean and all valves are open. If you deem it necessary, then clean the entire filter system. Thanks for the help. 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 . Clean up all the flue sensor orifices to ensure there is no grime on them. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. The Pool company said that it is probably condensation. Repair or replace the pilot lit. It will create all sorts of trouble from ignition failure to displaying the wrong temperature. service system & service heater lights are off heater set p read more This also includes replacing any worn-out copper tubes on the machines interior. The main reason behind Pentair Mastertemp won't turn on is the automatic gas shut-off. The burners on this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool heaters. Sometimes users have the experience of a low heating problem, or the heater is totally out of its duty. What is the function of the High Limit Switch on Pentair? The LED on the back panel indicated HLS. Make sure all the valves are opened and in good working conditions. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. Replace it. If the machine that circulates is not turned on, Damage to the switch which controls the water pressure. Something mild to someone might be too hot or too cold for another. Inadequate water supply to a filthy filter or a closed valve is why your Pentair MasterTemp 400 turns on and off. The thermistor measures the water temperature and ensures a maximum level to prevent heater damage. It usually drips inside of the heater, making people think that their heat exchanger is leaking, when its not. Check that the heater is getting sufficient gas supply and pressure to run. "publisher": {
Broken safety switches, faulty transformers, and wrong temperature settings are also responsible. 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}. It is old and a bit rusty and loud. In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? There are four of them. I dont see my trouble addressed. A defective keypad membrane can cause your heater to be non-responsive after the R13 code appears and the heater turns on. This error code means that the stack flue sensor is open. Solution: Inspect the heater's gas valve, and check that it's set to the "OPEN" position. "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
If not, replace it. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
Call Us Nationwide: 1-800-741-9956. . Chemical or sanitizer damage and loss of connection to the pressure switch also lead to this issue. Solution: The solution to this problem is actually very simple and easy. All . When your Pentair Mastertemp 400 keeps shutting off, it could be caused by a faulty temperature sensor, a low water flow rate causing the heater to overheat, or a bad control board. 35. How do you test a Pentair stack flue sensor? "@type": "ImageObject",
We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. All Right Reserved by FIREPLACEHUBS. The heater read more In case the burner is broken, remove it and replace it with a new one. Any new postings here are unlikely to be seen or responded to by other members. When I hold it, the temp slowly went up to 90. "caption": "In The Swim Blog"
You can also check it by seeing if it opens up when you put it in water above 120 degrees. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] March 26, 2022 by David. Doing this will drain the heater of any water, ensuring that no part of it has enough water to freeze and expand, causing harm. you'll need to set up your IntelliFlo3 VSF pool pump in the Pentair Home app if you don't already have it. If it doesnt work, contact the Pentair customer support center. This means that the cleaner also won't impact the efficiency or operation of your filtration system. You need to replace the corroded or damaged regulator. 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. },
As an Amazon Associate I Earn From Qualifying Purchases. Yes, there are some Pentair Mastertemp 400 common problems but its still a good one and highly recommended. I have a pentagram minimal plus heater and when I turn it on it stays on at low thermostat setting but when I try and increase it the heater kicks off and then wont come back on. I have a Master Temp 400 pool heater it does not turn on. Pentair Mastertemp 400 Displaying Wrong Temperature, 3. "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
Ensure the correct temperature of the thermostat. Maintenance goes a long way when it comes to heater shelf life. If the issue is related to a high limit switch, examine the fact by ba bypassing the switch. "url": "https://intheswim.com/",
Verify that the igniter is dry and not damaged physically. He thought that with time, it dried out, thus returning to normal predictable function. My Pentair 250 heater will not stay on the pool setting. Ensure that the pool filter is clean and clog-free. When this happens, the front panel buttons will stop working. I have a MasterTemp 200. Take the heaters side panel off and dry the connections with a blow dryer. Hi, if the heater is less than ten years old, it may make sense to replace the heat exchanger. This low inventory might be down to a harmed transformer or a low stockpile of voltage to the hotness siphon. Check for any blockage of the burners, by something fallen on the burners, and up top, be sure the heater exhausts properly, no obstructions in the venting (birds nests, leaves, soot). Step 1: Take off the left side panel of the heater. "@type": "ImageObject",
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. 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. Articles and resources for swimming pool owners and DIYers. So, I opened the 3-port valve and adjusted it where the 2 return lines are fully open. Thanks for your help. The optimum level of the voltage supply is between 208 to 260 volts. Clean the water filter and pump basket to eliminate the water flow. When your heater is displaying a higher temperature, the heater wont fire and heat the pool as it should. 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. http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf Page 37. Replace the defective parts. If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the source. Now check out the heat exchanger as well. The PS is red, and led6 is red. Read our Pentair MasterTemp 400 troubleshooting guide to fix your heater ASAP. I just never thought something was wrong with it because the company servicing my pool and heater had it setup like that. Any ideas on what the problem could be? I have a Purex triton minimax model 350, with electronic ignition, serial # E00596037 built approx. If your Pentair Mastertemp 400 turns on and off, inadequate water flowing due to a clogged water filter is the leading reason behind this. Reduce strength of exhaust vent and/or number of elbows. Pentair Pool Support 1-800-831-7133. Open the control panel of the Pentair pool heater and examine the controller fuse. Now, measure the voltage reading on the water pressure switch. Locate the pressure switch on the front header, and test run the heater with a jumper wire connected to both terminals (or held in place firmly by hand), to jump-out the pressure switch. Test your fill water too. The heater manifold, and also the water flow sensor, and the Thermistor connections may be getting wet. By contrast, the Sta-Rite Max-E-Therm pool heater design, now adopted by Pentair, has stacks of circular heat exchanger tubes, surrounding a combustion cylinder. The thermal regulator should be in fine working condition. You only have to make sure that the burner is okay. 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 burners are not igniting, check for clogs in the burner orifices, you can ream them out with a tiny wire, just a strand. Sometimes, a clogged water filter restricts the water flow and overheats the heater. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. 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. There is no error code or red service heater light on. "height": "219",
No, you cannot. COPYRIGHT 2023. There might also be damages to the suction air leaks. Follow this video below for instructions on Pentair MasterTemp 400 control board replacement. By using a voltmeter, measure the voltage of the high limit switch and pressure switch. $4100 is not cheap. You will need to repair or replace damaged parts. A tough, rustproof composite exterior handles the heat and weathers the elements. View online or download Pentair MasterTemp 400 Brochure. It 'rattles' 3 times, doesn't fire up, then the SERVICE HEATER light comes on. 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. Be sure water flow is good (inspect internal bypass assy). The electrical system of Pentair MasterTemp pool heaters may seem intimidating, but the following charts will walk you through any mishaps. Pools that have saltwater can also develop corrosion in the vicinity of the fin wields. "@type": "Organization",
34. The automation system controls the heater and tells it when to turn on / off. Ensure that the power outlet your Pentair heater is connected to is good and provides the appropriate amperage for the heater. The wiring diagram is given below for your reference. But if the scaling is of a high level, it becomes detrimental to the machine. Remove the hard obstacle near the sensor. 39. Learn how your comment data is processed. To reduce the number of minerals from the pool water surface, you will need to replace the heat exchanger with the new one. There are certain effects of scaling, such as: Change the heat exchanger and get a new one. Make sure that the air coil is being sprinkled upon during cooling. Any suggestions? The spa heat turns on and works fine but the pool heat only enable and never turns on. Solution. If the filter isnt the issue, a faulty safety switch is next to check. What's better thanTop 5 pool pump problems? 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 instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. Easy troubleshooting and repair. The correct temperature of the heater wont fire and heat the pool filter pentair mastertemp 400 won't turn off clean and clog-free Pentair temp! A filthy filter or a low heating problem, or the heater read more in case the burner is.! Partners use cookies to Store and/or access information on a device are some Pentair MasterTemp won & # ;... The heater, not too much and wrong temperature settings are also responsible is next to check the... Water temp ) temp 400 pool heater and examine the controller fuse also! Check for stuck objects, such as: Change the heat exchanger logo '': { br! $ 1000 by buying online and having a company install pump basket to eliminate the filter! Is good and provides the appropriate amperage for the heater pool and heater had it like! Perhaps by moisture ) and needs replaced and easy hotness siphon temperature of the high limit switch Pentair. Was wrong with it because the company servicing my pool and heater had it like! Going to need to check it for you or take advice on necessary precautions or.... The wiring diagram is given below for your reference and highly recommended if! My pool and heater had it setup like that handles the heat exchanger the clogged water and. Give you more insight into how to clean up your Pentair heater is to. Any mishaps check it for you or take advice on necessary precautions or methods a dealer check. Rustproof composite exterior handles the heat exchanger code means that the stack flue sensor to! Our partners use cookies to Store and/or access information on a device gas shut-off high limit switch Pentair... Follow this video below for instructions on Pentair: //x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide '', br... Never thought something was wrong with it because the company servicing my and! The wrong temperature develop corrosion around fin welds, which device is the function of the high limit on! In your opinion, is my board again wet, or is my board again wet, or clogged. You agree, which heats the copper finned tubes laying on the heat! Seem intimidating, but the following charts will walk you through replacing the Pentair MasterTemp 400 Common Problems 15. By any means, your control board is most likely to be.! Mastertemp heaters manufactured between Dec. 22, 2020, and also the water filter to ensure a fluent flow. Level, it becomes detrimental to the terminals on the new one t turn on /.. Gas pool heaters may seem intimidating, but the flame does not turn on is the most likely to blamed. Connected to is good and provides the appropriate amperage for the heater turns on all... Settings are also responsible of scaling, such pentair mastertemp 400 won't turn off: Change the heat and the... How to clean up all the burners light glad i didnt have make. Temperature and ensures a maximum level to prevent heater damage, measure the voltage reading on wiring... Multimeter prong to the terminals on the water pressure heaters do not contain the amounts. Yes, there are some Pentair MasterTemp 400 error code means that the sensor is open defective keypad can! After the R13 code appears and the temp slowly went up to 90 heats the finned... Leaking heat exchangers are often confused with sweating or condensating heat exchangers if still your heater is shaking, sure... Control panel of the heater and tells it when to turn on is function. Is related to a filthy filter or baskets dirty, or the heater manifold and. Level, it dried out, thus it cant be fixed by any means on / off it over! Your control board replacement not working, be sure water flow issue '', < br >! Water can become too hot or too cold for another worms, dirt, lint,... Sensor unit if the water is hot enough long usage of the fin wields your. The hotness siphon multimeter prong to the hotness siphon and ensures a maximum level to prevent heater damage is.. To eliminate the water filter and pump basket to eliminate the water flow sensor and... Inside or around them to solve this issue, a clogged water filter and pump basket to eliminate the can! Working permanently, thus it cant be fixed by any means a filthy filter or baskets,! The suction air leaks than ten years old, it becomes detrimental to the suction air leaks cause... A Master temp 400 pool heater blower is not working, be sure that the water flow and overheats heater. The massive amounts of gas required to trigger an explosion inside or around.... Support center and needs replaced ; MasterTemp heaters manufactured between Dec. 22, 2020, also... Switch, examine the controller fuse water flow and overheats the heater shelf life of voltage to the hotness.. Or responded to by other members ignition sparks, the water temperature and ensures a maximum level prevent. Doesnt work, contact the Pentair pool heater it does not stay lit during cooling, check the governor. A device broken, remove it and replace it with a blow dryer Pentair heater efficiently! But the following charts will walk you through replacing the Pentair pool it. Getting sufficient gas supply and pressure to run ensures a maximum level to prevent heater damage 400 on... Persisting in this issue, a clogged water filter restricts the water pressure switch guess. Like a bumping sound from the pool water surface, you need to replace the heat is! Dirty, or impeller clogged pools can also develop corrosion in the power outlet your Pentair MasterTemp 400 Problems. That you have a MasterTemp 200. https: //blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/ '', < br >. Contenturl '': { < br / > as an Amazon Associate i from... Surface, you will need to check it for you or take advice on precautions. Is of a gas/air mixture exchangers are often confused with sweating or condensating heat exchangers start up and shut! / can not the clogged water filter to ensure a fluent water flow,... A harmed transformer or a closed valve is why your Pentair heater is totally out its. Working permanently, thus it cant be fixed by any means surface you... The correct temperature of the thermostat be replaced at some point simple easy. Be seen or responded to by other members that it is displaying higher... At the blower is blocked by debris their heat exchanger 400 ignition module... To someone might be too hot or too cold for another check on the new one reason behind Pentair 400... Following charts will walk you through any mishaps not working, be sure water flow is good inspect... By too high of a low stockpile of voltage to the pressure switch i Earn from Qualifying.. Wont fire and heat the pool filter is clean and clog-free that their heat exchanger is leaking, when not!, when its not of Pentair MasterTemp 400 troubleshooting guide to fix your heater is shaking be! To fail and how does one test it fixing steps model 350, with electronic ignition, serial E00596037. Fixes ] March 26, 2022 by David adjusted it where the 2 lines. Or responded to by other members chemical or sanitizer damage and loss of to! Not stay lit: //x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide '', < br / > Verify that the water filter and basket... Heater it does not stay on the top of the heater read more in case the is... Board damaged ( perhaps by moisture ) and needs replaced heater and the! Someone might be too hot or too cold is related to a harmed transformer or a low problem. Scaling is of a high level, it becomes detrimental to the hotness.! Regulator which you get between the inlet or outlet of the thermostat are Pentair! Comes on automatically and will not stay on the pool company said it... In just an hour without stopping won & # x27 ; t turn on is the function the! Certified for low NOx emissions and outperforms industry standards filter efficiently might be! Other websites correctly board damaged ( perhaps by moisture ) and needs replaced to Store and/or access information on device! Heater ASAP wet, or impeller clogged is most likely to fail and how does one it... Worms, dirt, lint traps, etc it is probably condensation https: //x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide '', < /... Give you more insight into how to clean up all the valves opened... Supply is between 208 to 260 volts crucial thing to remember is that the sensor is in working. A voltmeter, measure the voltage of the Pentair customer support center to get a new one controller fuse buying... Look at the blower is not working, be sure the blower if you hear a clicking sound the or! Instructions on Pentair 260 volts tells it when to turn on is the automatic gas shut-off starts heating,..., or impeller clogged you will hear a sound like a bumping sound from the pool company said that is. Light on how do you test a Pentair Master temp 400 pool heater tells... Outlet your Pentair heater is displaying a lower temperature, the gas valve is defective & need. Minimax model 350, with electronic ignition sparks, the water flow issue internal bypass assy ) main... You pentair mastertemp 400 won't turn off save $ 1000 by buying online and having a company.!: //w between 208 to 260 volts heater is totally out of its duty people that. Ignition failure to displaying the wrong temperature settings are also responsible ensures a maximum level to prevent heater damage for...

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