Pentair MasterTemp 400 customer care can provide you with a replacement control board. Its a fun combination of plumbing, wiring and gas. Make sure the thermal regulator seats correctly in an accurate position. Check the pumps strainer basket if the filter has been cleaned and the PSI is not high. ), Pentair MasterTemp 400 Ignition Lockout [7 Easy Fixes], 2. To check your heaters ICM, remove and open the ICM up and inspect why it goes bad. If replacing the keypad membrane hasnt stopped your heater from turning on automatically, you need to call customer service for a new control board. The green spa or pool light comes on but the orange light for the heater doesnt come on. filter. Again, if it is displaying a lower temperature, the heater may keep heating even if the water is hot enough. Check your igniter module. The Membrane switch becomes faulty for the following reasons: When your Pentair Mastertemp 400 refuses to turn on, check your heaters Membrane Pad and see whether the pad is displaying the digital temp or not. So be careful while tasting the transformers voltage. It fires up fine again then the same thing happens. You may need professional assistance to fix your heater if you dont have much electrical knowledge. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. Before turning on, the heater contains a pressure switch and an internal bypass to ensure the right amount of incoming water flow. However, your heater will show the exhaust temp. Remove the wiring connection. Thoughts? . We manually turn up the temp to a warmer setting when we swim while the system is running. $354.18. I have a Pentair 400 master temp. If not, be sure the faulty Membrane switch is the culprit. Wet Or Damaged High Limit Switch 5. 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. Thank you Frank Also, do you think $4,100, all in (including tax, install/labor, new heater, extra parts) is reasonable or thats really high? The burners on this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool heaters. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. Wash them out very carefully with a hose. 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. This problem needs to be fixed ASAP. The Thermal Regulator is located behind the threaded plug in the Inlet/Outlet Manifold, between the inlet and outlet fittings. You can test the thermal regulators continuity by removing it. For those in the snowbelt who close down their pools, their equipment, Once upon a time, there were only OEM (Original Equipment Manufacturer) parts available. 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? Inspect the pump and filter and clean if necessary. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. It cycles for a bit then I hear a click either it fires off or it doesnt. Freeze Damage You have a working thermal regulator if it opens. Hi Hugh, is it a Hayward heater? The blower fan regulates the correct amount of exhaust and plays a large role in correct combustion. Carlos, those symptoms are HLS when it cools down, it turns back on. Ensure that the pool filter is clean and clog-free. Thus your Pentair Mastertemp 400 fails to turn on due to the igniter with a low resistance to the ground. Here we have elaborated on all the troubling points as well as the fixing steps. how to fix Pentair MasterTemp 400 common problems, connect the wires according to the installation manual, Pentair Heater Not Turning On [7 Easy Fixes], Pentair MasterTemp 400 Not Heating [7 Easy Fixes], State Select Water Heater Pilot Light Issues [7 Easy Fixes], Richmond Tankless Water Heater Code 29 [Reasons + Solutions], Richmond Tankless Water Heater Code 13 [Reasons + Solutions], Richmond Tankless Water Heater Code 11 [Why+ How To Fix], Richmond Tankless Water Heater Code 12 [Why+ How To Fix]. Kindly help. 1. Pentair MasterTemp 400 Common Problems [15 Easy Fixes] 1. From the Max-E-Therm heater, disconnect the system. If the heater still wont turn on after cleaning the flame sensor, its time to get it replaced. I look forward to your advice. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. Defective Ignition Control Module 7. Rust or red spiders can clog these up. We have a Pentair minimax 100 Dsi. If it fires off everything works fine a few minutes then shuts off.Ideas?Filter is clean. You may safeguard your equipment from seawater erosion by using cupro-nickel. William firmly believes that anyone can repair his/her unit with the correct guidance & knowledge. Remove the old thermal governor and replace it with a new one. Do you have a picture of the Fenwal? Step 3: Disconnect the heater's previous ICM unit. Is there a bypass valve open? Quantity: $172.56. Examine the connection between the burner and the gas and other lines to see if it is secure. Then, replace the faulty heater part or parts. Easy. Your heater valves also become closed due to the filters dirt or debris build-up. First, check that the fuel supply is adequate and the gas pressure is good. Be sure water flow is good (inspect internal bypass assy). 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. Following the Pentair Mastertemp 400 manual, connect the wires during your heaters ICM replacement. The main reason behind Pentair Mastertemp won't turn on is the automatic gas shut-off. 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. Alerts pushed to a smart device to keep you updated on heater performance and real-time status. However, the igniter becomes faulty for the following reasons: The defective igniter prevents your Pool heaters turning on and flame creation and causes a gas leak in your heater by increasing the gas flow. Pentair 77707-0001 Manifold Bypass Valve . If your Pentair MasterTemp is making a knocking sound, it can be because of a faulty manifold bypass or a broken temperature regulator. The four bolts on the heating jackets must be removed. If the Fenwal light is flashing 3 times indicating a lockout, that indicates that the Fenwal ignition control module is not reading a flame current signal. Still have the power light lit but no other lights are lit. Hello. Follow the actions outlined below to replace it. If you are sure that the heater is getting power from the outlet, examine the fuse inside your heater. If your Pentair Mastertemp 400 won't turn on, for sure, the heater is facing a power supply degradation problem from the . Power is not going on the ignition module. I think its a bit on the high side. Connect each multimeter prong to the terminals on the stack flue sensor. Thanks for the help. When I finally was able to control again (for a time, keypad controls seemed to be disabled), I shut heater off, let it sit for a time. Moreover, water cant move at a normal rate through the clogged filter. Condensation is normal when the water is cold. Replace or Repair your Swimming Pool Filter? . like it is having trouble exhausting, check for birds nest or heavy spiderwebs or leaves on the heat exchanger. Looking like might be bad control board? Pentair Mastertemp 400 Won't Turn On [10 Troubleshooting Tips] 1. This issue should be checked ASAP. We recommend you dont try to perform repairs that you dont feel confident attempting. I sent the following on May 23, but received no reply/advice. The Pentair Mastertemp 400 is a heater that is used to warm water in swimming pools, as well as in spas. When I hold it, the temp slowly went up to 90. If needed. But, need someone to do the work, etcso, probably need to order it through this small, local company, right. filter should be backwashed. When you switch on the heater and it runs through the 888, 128, R13, pay attention. We receive monetary benefits in return for showing ADs on this website at no cost to you. The valve has to allow enough water into the heater, not too little, not too much. Faulty Temperature Sensor 9. A faulty control board can cause a variety of problems with your Pentair MasterTemp 400, including ignition failure. . You need to follow the instructions given below to replace the AGS switch. If the pump is running, its likely that the filter and/or skimmers need to be cleansed. Turn on your heater and set the desired temperature. Contact customer service and tell them about the issue. This problem can be resolved by servicing the pump or filter. Improperly Grounded Burner Flame Holder 3. However, the faulty ICM fails to ignite your heater. Wait for some time, and as soon as your heater dries out, hopefully, it will turn on again. The most crucial thing to remember is that the sensor is in good working order. Remove the AGS Switch from the Manifold by unscrewing it. When you try to turn on your wet heater, its igniter doesnt fire. Find thermal regulators, control boards and more in our expansive inventory. And again, I always thought that when something big happened, I would have to get it replaced. The pool heater is about 4.5 years old. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. The 2nd is after modified the 3-port valve to the return lines. Supercedes #42002-0052S. Bad Control Fuse 5. Heater Won't Turn On 6. 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. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. 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. Digital connectivity with your pool's automation system and an advanced ignition control module with flame strength sensor help to ensure optimal heater performance. In fact, his aim is to help his readers to fix the issues with their heating appliances easily.More about us . Dont stress! Look for a short between the Thermistor and the control boards wiring. When I fire up the heater on Pool it begins to heat but after about 5-10 minutes it moves over to Spa Heat (which I dont have a spa) and shuts down the heater. So Im very happy. Pentair water heaters have garnered a dependable reputation for being efficient. Make sure that the pilot is lit (millivolt heaters). Im not sure where to even begin. 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. We and our partners use cookies to Store and/or access information on a device. The ignition control then outputs 24V to the Operating control ( Val to Val ) and through the safeties (Ags and Stack Flue Sensor to the gas valve). Bad Control Board FAQs: In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? When your heater wont turn on, you probably have a blocked filter, tripped safety switches, or a defective control board. All Right Reserved by HeaterFixLab. I have a Purex triton minimax model 350, with electronic ignition, serial # E00596037 built approx. You may need to replace it. Then replace the faulty ICM. You need to examine which part is malfunctioning. A leaking heat exchanger is a serious situation. In this section, we will explore the causes behind ignition lockout in more depth as well as for instructions on what to do during an ignition lockout on a pool heater. The thermal regulator should be in fine working condition. Disconnect the igniter from your heaters motherboard wires by removing the screws and retaining the bracket. Membrane switchs damaged or faulty wiring. Defective Membrane Switch 8. You will need to reset your heater to get it out of the lockout. Our Pentair MasterTemp troubleshooting guide starts with the error codes shared by both models. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. Frank, I do concur with the pool tech, that this seems like a wet circuit board, but perhaps also a damaged circuit board at this point. Step 3: Drain the heater by removing the Drain Plug from under the Manifold. Replace ignition or control module. Clean up all the flue sensor orifices to ensure there is no grime on them. COPYRIGHT 2023. 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. http://www.haywardnet.com/pdfs/uhs-heater-troubleshooting-guide.pdf. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Replace it if you want, or just continue to use the spa thermostat, for pool heating. We are always here to help you. When the heater tries but fails to start, it recycles. Your pool heater needs to be prepared for the winter so that it doesnt incur any freeze damage. If your heater fails to turn on just after raining, be sure that the wet heater is facing some issues. He loves to share his knowledge & helps others in fixing their units & saving their pockets. Be sure all connections are clean and tight. Once clean, put the filter back together. While running your heater, you need to ensure that the water pressure is not too high. Thank you for your time and response. 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. An example of data being processed may be a unique identifier stored in a cookie. Your heaters Membrane Pad has the pool/spa/off buttons and a keypad for inputting the spa and pool temperatures and displaying the digital temperature. The sensor is operating if the resistance is 3.5 ohm or above. 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. The pipes going in and out of the heater need to be unplugged for good measure. If it isnt, theres a problem with the module. Carefully detach the HSI from the unit. In short the system keeps automatically turning the temp up on its own. 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