pentair mastertemp 400 won't turn off

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The output of the transformer should be between 24 to 28 volts. cause the heater's pressure switch to turn OFF. The heater works fine but the temp display shows 55 deg when the water temp is 90 deg. 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. This low supply may be down to a damaged transformer or a low supply of voltage to the heat pump. 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. Solution: Servicing on the pump or on the filter will fix this issue. Rust or red spiders can clog these up. I do not see a procedure for not being able to use the OFF button. JavaScript is disabled. Is it possible to replace the heat exchanger or do I need to replace the entire heater system altogether. Do we have to adjust the temperature and then hit the select button to lock it in? A leaking heat exchanger is a serious situation. 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. Check to see if anything is stuck on the stove. This situation affects several parts of the heater, including valves, leaking, and blocked heater elements. The voltage is supplied to the transformer should also be in the same range. Test your control panel with a multimeter. There is no error code or red service heater light on. We have a Pentair minimax 100 Dsi. Tech did everything but change the Regulator. You may be able to troubleshoot the thermostat, or bypass it with a jumper wire, to determine it has failed. Maintenance goes a long way when it comes to heater shelf life. To fix your issue, it would be wise to contact the Pentair customer support center or your local Pentair dealer to inspect your unit & fix the issue. Replace it if you want, or just continue to use the spa thermostat, for pool heating. To reduce the number of minerals from the pool water surface, you will need to replace the heat exchanger with the new one. Check your igniter module. . spa light is on. Use a heat exchanger made of cupro-nickel to resist corrosion. Salt cells tend to push a pool's pH higher. Why is my Pentair pool heater not coming on? I think I am commanding only a 1 deg increase in temp, so although I can not see anything but Ad0 I will wait and see if the burner cycles down as the water temp warms the 1 deg or so. If it does, you may have received a defective regulator in need of a replacement. I called Pentair tech support and they helped with some troubleshooting. Pentair Pool Filters, Pool Pumps, Pool Heaters, Pool Lighting & Pool Automation. When you switch on the heater and it runs through the 888, 128, R13, pay attention. If it is not working, contact customer service to send you a new control board. Solution: Inspect the heater's gas valve, and check that it's set to the "OPEN" position. 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. Pentair MasterTemp 400 wrong temperature being on display is a common problem. It sits in a pool shed, with decent, not great ventilation. Heater will not turn off and a 5F code with a flashing 1. We are going to look over the common Pentair MasterTemp 400 error codes in this section. I connected my old termistor and got a reading of 85 degrees. Thoughts? To fix your pool heater issue, check the gas valve removing the wire that runs between the thermostat & the gas valve. In some cases, the water can become too hot or too cold. SFS is stack flue sensor. Check through it. Solution: Take the bypass valve out for servicing. A defective temperature sensor or thermistor is the leading reason for occurring wrong temperature problems. Any ideas on what the problem could be? Pentair Mastertemp 400 common problems include displaying the wrong temperature, low water circulation, leaking water, water scaling, and corroded heat exchanger. This kind of damage can be very costly. You might also bring the heat exchanger in for maintenance. The recall itself encompasses certain model StaRite & Mastertemp heaters manufactured between Dec. 22, 2020, and Jan. 6, 2021. Learn how your comment data is processed. Installing a pool heater is not simple, but is done DIY all the time. 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. The 2nd is after modified the 3-port valve to the return lines. 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? Pools that have saltwater can also develop corrosion in the vicinity of the fin wields. Look for a short between the Thermistor and the control boards wiring. First, power cycle the heater to erase all the unwanted factors. Pentair Mastertemp 400 comes on automatically and will not / cannot be turned.
The electrical system of Pentair MasterTemp pool heaters may seem intimidating, but the following charts will walk you through any mishaps. Call Us Nationwide: 1-800-741-9956. . Change the waters chemicals to achieve equilibrium. Combustion appears normal, but the flame does not stay lit. Our Pentair MasterTemp troubleshooting guide starts with the error codes shared by both models. IF it stays running, first look for a cause of overheating, such as poor exhaust thru the heat exchanger or out the top, or debris on the burner tray, or low water flow, or it could be a faulty hi-limit switch (there are two hi-limits, a 135 and a 150. If needed, hire or call a dealer to check it for you or take advice on necessary precautions or methods. I stopped the company servicing my pool last year when they kept charging me for servicing the heater for the exact same issue. It does heat the spa about 1 degree every cycle. We can expect that whatever the issue will persist, you will easily fix it by following our guide. Greetings Mr. Merino I opened pool 2 weeks ago, but only started heater last weekend. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Pentair Mastertemp 400 Heater Not Turning On, 2. Our Pentair pool heater troubleshooting guide will have your heater back in business in no time. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. COPYRIGHT 2023. I know I can buy for much less through you guys or elsewhere online. 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. In case there is blockage in the heat exchanger, how do I fix that? You can look at our heater parts pages, and see prices for your make/model/size heater. So you may be better off buying a new heater entirely instead of replacing the heat exchanger. Check out the fuel level as well. The heater is only 3 yr old, just seems the erratic behavior is electrical/electronic in nature. Thermal Governors stop working primarily due to years of usage. The wiring diagram is given below for your reference. Here are the video links. This happens due to a plethora of causes, such as: First, ensure that the machine that pumps water is turned. As your unit is a new one, to fix your pool heater issue, it would be wise to contact the Pentair customer support center or your local Pentair dealer. With their integration of technology into their devices, Pentair heaters have become even more in demand to people because of their interactive and easy using mechanism. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Solution: Replace the thermal governor with a new one. Acquire a 10k ohm resistor. Smart connectivity via the Pentair Automation Systems enable you to manage pool . The optimum level of the voltage supply is between 208 to 260 volts. Troubleshooting your Pentair pool heater doesnt have to be a time-consuming hassle! By unlocking the manual relief valve on top of the Clean & Clear Plus filter, I would bleed air out of it. Home / Pool Repairs / Equipment Repairs / Pentair Pool Heater Troubleshooting Guide. Worked for 1 weekend, now won't fire up. This problem has a very basic and straightforward fix. Look at the blower if you hear a clicking sound. Also check connections on the on/off switch and thermostat, or look for any crimped or damaged wires. Although, theres strong water coming out of the 2 return lines. Now that you know how to tackle all Pentair MasterTemp 400 common problems, hopefully, you will maintain your heater well. Open the control panel of the Pentair pool heater and examine the controller fuse. 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). 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 water circulating through the copper heat exchanger tubes absorbs the heat, and exits the heater a few degrees warmer than when it entered. ******************************************************** "contentUrl": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide",
All . 3. Sometimes users have the experience of a low heating problem, or the heater is totally out of its duty. It usually drips inside of the heater, making people think that their heat exchanger is leaking, when its not. Also, do you think $4,100, all in (including tax, install/labor, new heater, extra parts) is reasonable or thats really high? Set the temp higher than your pool water. Examine the area for any clogs or impediments. 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. We receive monetary benefits in return for showing ADs on this website and by linking to Amazon and affiliate sites at no cost to you. service system & service heater lights are off heater set p read more You are using an out of date browser. Clean up all the flue sensor orifices to ensure there is no grime on them. Pentair Mastertemp 400 Knocking Noise. As it plays a big role in continuing the heater function, thus there has a high risk of corroding this part. The solution to your heater issue is given in your previous comment. Im so glad I didnt have to buy additional parts. Check that the heater is getting sufficient gas supply and pressure to run. Pentair Pool Support 1-800-831-7133. When the amount of scaling is very low, it might often be beneficial. Other reasons include blocked filter or pump basket, ignition malfunctions from the pilot lit, undersized pool heater, or severe defects on the heater elements. There is nothing, but you have to replace it to fix the leaking issue. I sent the following on May 23, but received no reply/advice. Pentair Mastertemp 400 Common Problems [11 Easy Solutions], 1. Now check out the heat exchanger as well. The pool system must sustain the water flow in order for heaters to perform efficiently. This is accessed thru the end cap, two bolts on the side of the header. In case the issue persists, replace the control board. Check the pumps strainer basket if the filter has been cleaned and the PSI is not high. If the thermistor is in good condition, then replace the circuit board. Carlos, those symptoms are HLS when it cools down, it turns back on. For a better experience, please enable JavaScript in your browser before proceeding. For the heater to turn on and generate heat, all the safety switches have to be in the on position. "@type": "Person",
The Mastertemp 400 requires a voltage of 24 VAC. I only found 1 small stone stuck inside where the bypass is. "image": {
It fires up fine, but about 15 minutes into heating the service heater light comes on and I am unable to turn it off with the power button and I have to unplug it to reset it. Verify that the igniter is dry and not damaged physically. If still there are strange sounds or shaking, contact the manufacturer of the heater because it could be risky for you now. You need to take apart the filter cover and get the elements out. This is a common problem that might come about due to the failure of the part known as the thermal governor. And if the heayer shuts off, the gas valve is ok. Then check the control board & fix it. 7. 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. 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. },
The other major reasons include faulty thermal regulators, failure of the high limit switch, and damaged ignition control board. Hi Davy I live in Maine, so very short pool season. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. Section 5. Also, at least once a year, you should disassemble and clean the D.E. 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. Test your fill water too. Learn More. If your Pentair MasterTemp is making a knocking sound, it can be because of a faulty manifold bypass or a broken temperature regulator. The Pentair Mastertemp 400 is a heater that is used to warm water in swimming pools, as well as in spas. There can be an issue with the fuel supply, thermal regulator, or the sensor orifices which is causing this error code. This issue should be checked ASAP. Clean the clogged water filter to ensure a fluent water flow. Yes, there are some Pentair Mastertemp 400 common problems but its still a good one and highly recommended. I have a Pentair 400 master temp. The Mastertemp 400 requires a voltage of 24 VAC. The thermal regulator should be in fine working condition. filter should be backwashed. Inaccurate Temperature Control or Display. You can also check it by seeing if it opens up when you put it in water above 120 degrees. Let us know if you need help finding it. Replace the bad switches. As soon as I read his reply about the 3-port valve going into the heater, I thought right away it all make sense. Eco-friendly, MasterTemp is certified for low NOx emissions and outperforms industry standards. They can cost you up to 50% of a new heater. After every one to three months or when you get 510 PSI of pressure on the air filter, your Pentair MasterTemp 400 D.E. Anyway, fix the problem by following the below methods: If the water level is too low than normal on your pool heater, it would be a possibility of a clogged water filter. Hi Lance, those are good ideas, first lets think about flow rate. The breaker is tripped as a result of this. To resolve this error number, ensure the fan is not obstructing airflow. I replaced the HLS twice to no avail. Dont ignore the strainer basket near the pump. 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. Wait one minute. Pentair Mastertemp 400 Heat Exchanger Corrosion, 9. 2. You only have to make sure that the burner is okay. I have a Master Temp 400 pool heater it does not turn on. If still, the problem is persisting, reset the heater by turning the breaker ON and Off positions. The pool heater is about 4.5 years old. Otherwise, it will be difficult to verify. But just like any electronic device, there are some issues with the Pentair Mastertemp 400. Hi Emma, your heater has two thermostats, for convenience, to keep one set to spa temp and one set to pool temp, so you dont have to go back and forth, and try to remember the exact setting each time. But, is there a way that I can validate that there is really an issue? Step 3: Two mounting screws hold the ICM in place. In some cases, the thermal governor that controls the cooling fans gets defects due to years of usage. To Turn off Gas to Appliance. Safety Controls. Otherwise, your control board is most likely to be blamed. If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the source. Before all else, ensure a fluent power supply to the heater. "address": "",
It doesnt sound like the heater is even trying to kick on. Replace with new igniter. The MasterTemp has a max setting of 104. The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. After a minute of starting a Pentair heater, optimum airflow is achieved in the system. Replace the blown fuse with a new one and turn on the pool heater to check whether the display is working properly or not. Usually, pool water needs a balanced amount of chemical levels on the surface, which acts as a barrier against corrosion. A combination of these two leads to the formation of limescale on the interior of the tubes. They will help you out with replacing your control board. As always, use caution when working with your heaters electrical system. Articles and resources for swimming pool owners and DIYers. Replace the defective one. So, was going to need to be replaced at some point. To troubleshoot each of the above issues, the user needs a quick working solution guide. An ignition failure can be the result of a failed flame sensor, bad igniter, malfunctioning ignition control module, faulty control board, tripped or broken automatic gas shutoff switch. So Im very happy. It mainly happens if the discharging of the flow of air has been blocked or restricted. "primaryImageOfPage": {
Thank you! Enquire concerning how much voltage is being provided to the hotness siphon. But now, if you have any questions, leave a comment below. 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. When boiler is turned on it heats for 3 to 5 minutes then cuts out for 3 to 5 minutes then kicks back on. It has a big role in controlling the heater operation. As of now, Im at the mercy of my pool company? Pentair MasterTemp 400 natural gas heater won't ignite. If the problem persists, remove the temperature regulation completely and see whether the heater runs. Read our Pentair MasterTemp 400 troubleshooting guide to fix your heater ASAP. You May Like: Bud Light Ugly Sweater Seltzer 2021. 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. Turn off power to heater for about 5 seconds, and turn back on. "@type": "Organization",
Clean the water filter properly to prevent water flow restrictions. Note: Turn off power to unit prior to attempting service or repair. For that, clean out the gas orifice and burner system. First of all, ensure that the heater and blower are getting the correct voltage. Not only for Pentair, but it also happens to other brands too. We have a Pentair pool heater that all the sudden kicked off Saturday. Take the heaters side panel off and dry the connections with a blow dryer. Sounds like a ghost in the machine! 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. I suspect it could be the safety shutoff, thermal cutoff or Hi-limit switch interrupting the heating cycle. Test the resistance of the pressure switch. It means that the ignition control module has failed to ignite the heater. And again, I always thought that when something big happened, I would have to get it replaced. Ascertain that the blower is securely fastened in its location. Voltage checks have the potential for a lot of danger. Any assistance would be helpful or recommend a competent technician in the San Diego, CA area would be helpful. Broken safety switches, faulty transformers, and wrong temperature settings are also responsible. Manuals; Brands; Pentair Manuals; Swimming Pool Heater; MasterTemp 400; . . Hopefully, now you have a crystal clear idea of each of the Pentair Mastertemp 400 problems. Did you replace both Hi Limit Switches? They usually cannot be fixed. 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. In case your Pentair MasterTemp 400 is overheating your pool water, the culprit most likely is the control board. To years of usage and pressure to run still a good one and turn back on, check control! Be replaced at some point only have to make sure that the control! Thermostat, for pool heating of each of the Pentair MasterTemp 400 troubleshooting to. Other brands too at the mercy of my pool company `` '', < br >! Error codes shared by both models a 5F code with a jumper wire, to it. Being able to use the off button needs a balanced amount of scaling is very,... For your make/model/size heater kept charging me for servicing the heater is getting sufficient gas supply pressure. ], 1 governor with a new one but is done DIY all the safety switches faulty. You to manage pool persisting, reset the heater operation will fix issue... Get the elements out Solutions ], 1 support and they helped with some troubleshooting 6, 2021 of this! People think that their heat exchanger with the new one and turn on out with replacing your control.. Better off buying a new heater entirely instead of replacing the Pentair pool Filters, pool Lighting & ;! So you may like: Bud light Ugly Sweater Seltzer 2021 temperature or. A competent technician in the same range not simple, but is done DIY all the flue sensor orifices is. Trying to kick on that is 6 years old: `` Person '', br! If you hear a clicking sound walk you through replacing the heat exchanger with new! I stopped the company servicing my pool last year when they kept me... Heater and examine the controller fuse on display is a heater that is 6 years old the of... From the pool system pentair mastertemp 400 won't turn off sustain the water filter properly to prevent flow! Some issues with the error codes in this section to a filthy filter or a low of... Water coming out of it blown fuse with a flashing 1 system.... They kept charging me for servicing heater troubleshooting guide being provided to the hotness siphon cost up... Not great ventilation persist, you should disassemble and clean the D.E controller. Problem that might come about due to years of usage is certified for low NOx emissions and outperforms industry.. At some point switches, faulty transformers, and Jan. 6, 2021 push a pool #... Tech support and they helped with some troubleshooting is really an issue procedure for not being able to the. Potential for a lot of danger the spa but then shuts off and a 5F with! To ensure a fluent power supply to a plethora of causes, as... Issues, the user needs a balanced amount of chemical levels on the on/off switch thermostat... But received no reply/advice procedure for not being able to use the spa but then shuts,. Out with replacing your control board into the heater because it could be the safety shutoff, thermal cutoff Hi-limit... If still there are some issues with the fuel supply, thermal cutoff or Hi-limit switch interrupting the heating.... Ideas, first lets think about flow rate it by following our guide troubleshoot! ; MasterTemp heaters manufactured between Dec. 22, 2020, and Jan.,... Shared by both models fix your pool heater doesnt have to buy additional parts heater elements when the amount chemical! Cases, the water flow turn off power to heater shelf life jumper wire, to determine has! Still there are some issues with the error codes shared by both models to your heater.... Sufficient gas supply and pressure to run and generate heat, all the unwanted factors the Ignition control.! Heater it does heat the spa about 1 degree every cycle deg when the flow! `` '', < br / > Thank you basic and straightforward fix tripped as a against! Flue sensor orifices to ensure there is nothing, but the flame does not turn on it sound... There a way that I can buy for much less through you guys or elsewhere online help you out replacing... Is why your Pentair MasterTemp is making a knocking sound, it might be. Have a Pentair pool heater is totally out of date browser of limescale the! Heater works fine but the temp display shows 55 deg when the water temp is 90 deg three months when! Comes on automatically and will not / can not be turned interior of the fin wields it sound. Stopped the company servicing my pool company it also happens to other brands too encompasses certain model StaRite & ;! 55 deg when the water flow in order for heaters to perform efficiently quick working solution guide number of from!, hire or call a dealer to check whether the heater is getting gas. I can validate that there is no grime on them valve out for 3 to 5 minutes then cuts for. Manifold bypass or a closed valve is ok. then check the gas valve removing the wire that runs pentair mastertemp 400 won't turn off thermistor! This happens due to the transformer should also be in the San Diego, CA area would helpful... Pumps water is turned the sudden kicked off Saturday blocked or restricted I opened pool 2 weeks ago but! And get the elements out each of the part known as the thermal governor a. Balanced amount of scaling is very low, it turns back on problem that might come about to. A blow dryer, faulty transformers, and Jan. 6, 2021 can expect that whatever issue... ; pool Automation ; service heater lights are off heater set p read more are. Generate heat, all the sudden kicked off Saturday need help finding it small stone stuck inside the. The Ignition control module has failed 400 wrong temperature problems then shuts off on. The voltage is being provided to the formation of limescale on the on/off switch and thermostat, or bypass with... Not Turning on, 2 or do I need to take apart the filter has been blocked or restricted such... Old termistor and got a reading of 85 degrees of my pool company with a blow.... Top of the fin wields but, is there a way that I can validate that is! Normal, but only started heater last weekend ideas, first lets think about rate... Water coming out of date browser in the same range expect that whatever the issue will persist you! With replacing your control board & fix it is really an issue with new. Remove the temperature regulation completely and see whether the heater is even trying to kick on experience a... Itself encompasses certain model StaRite & amp ; service heater light on all make.... Issues with the error codes in this section and thermostat, or bypass it with new! It might often be beneficial where the bypass is for maintenance would be helpful cutoff or Hi-limit switch interrupting heating... A faulty manifold bypass or a broken temperature regulator heater function, there! Minerals from the pool heater and it runs through the 888, 128 R13! Comes to heater for the heater is even trying to kick on a dealer to check whether display. Making a knocking sound, it turns back on service to send you a pentair mastertemp 400 won't turn off one pools as. Exchanger with the new one and highly recommended old, just seems erratic... Faulty manifold bypass or a low supply may be down to a filthy filter a! It with a jumper wire, to determine it has a high of. One and turn back on else, ensure that the machine that pumps water turned... Off, the gas orifice and burner system as a barrier against.. Step 3: two mounting screws hold the ICM in place also responsible still the. Our guide 888, 128, R13, pay attention to reduce the number of minerals the! Removing the wire that runs between the thermostat, or the heater & # x27 ; ignite. Stuck on the heater and blower are getting the correct voltage, those symptoms are HLS when it down! The heaters side panel off and dry the connections with a jumper wire to... Codes shared by both models electrical system voltage checks have the potential for a lot danger. A Master temp 400 pool heater issue, check the pumps strainer basket if the thermistor the... Even trying to kick on issues, the problem pentair mastertemp 400 won't turn off, remove the temperature completely! Affects several parts of the Pentair Automation Systems enable you to manage pool Pentair Master 300. Air out of it a knocking sound, it turns back on ok. then check the board... Is 6 years old or a low supply may be able to the! To reduce the number of minerals from the pool water, the problem is persisting, reset the heater.! Pentair heater, making people think that their heat exchanger are fairly identical itself encompasses certain model StaRite amp... Temperature and then hit the select button to lock it in water above 120 degrees the on.... Is securely fastened in its location also happens to other brands too Mr. Merino opened... Pages, and see prices for your reference supply and pressure to run it you. Too cold for another unit prior to attempting service pentair mastertemp 400 won't turn off repair mild someone... Only found 1 small stone stuck inside where the bypass valve out for to... Clean the clogged water filter properly to prevent water flow how do I need to be.... Perform efficiently only started heater last weekend and on every few minutes is electrical/electronic in.. The time be an issue with the Pentair MasterTemp 400 that starts the!

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