I suspect maybe it’s the flame sensor? It does heat the pool great otherwise. Was told thermostats Then after 10 minutes or up to 1 hour the heater turns off! It got a little splashed from the filter being open when I cut the pump back on. I have tried flipping the breaker, checking all the connections in the heater. The ProLogic unit is set to Heater OFF, but the heater still turns on. Hi Is your heater lashing an error code? If all else is good (adequate gas pressure, no soot buildup, etc.) Was the air bled from the gas line? This year when I tried using it for the first time the breaker would trip every time the compressor would try to kick on. I checked when it was dark outside so i could see the flame glowing in the sight glass. Recently, replaced the pressure switch and it will fire up, but it cycles in what seems like high/low moments over and over. I have a H200 gas heater. Any help with solving this issue would be greatly appreciated. I have a Jandy Pool Heater, model LT400N-L (made 6-2006) and it stopped working. But does it cost too much to run? The heater panel is still blank and pool heater stayed shut down . I was wondering if you could help me figure out what is happening to my heater. Pentair 460776 MasterTemp Heater 400BTU LP Low NOX ASME. It’s normal to say no flow and hibernate until the pool motor comes back on. What is happening is we will use the heater to heat up the spa. Have not tried to jury rig a fix as I have the broken fitting. I got everything installed and the heater starts and fires up and the shuts off and gives a IF code. View and Download Pentair MasterTemp operation & installation manual online. Hello I have a Pintar Minimax 250. Bleed air from the gas line, then look to see if the pilot is lighting. Service indicated not low on Freon. I got ao code quick and i noticed the blower was really hot. Flow switch is good. I have a brand new Hayward 3000 btu pool heater. Pentair Master Temp 400. We have a Pentair MasterTemp 250, and the gas comes on perfectly. If the heat pump senses the water is not to temp, but feels that water flow has slowed, it goes to a standby mode. Easiest way to diagnose this? (It’s an in ground, in Georgia, was fine last year. I have a three year old Aqua Cal electric pool heater. Raypak 106a. This an natural gas model, 460732, which someone modified for a propane feed long before I bought the house. Once you remove the cap pull out the spring and the regulator will be at the end. I’d fork out the money for the service call. When it turns off it also turns the pilot flame off. Older model…….probably around 20 years old. I bought pentair master temp 400 pool heater 3years ago . It worked for one night on the hot tub, and then i got the ao code again. My Pentair Mastertemp 400 work for a few min and then cuts out. In this blog article, we cover the most common swimming pool heater problems a pool owner might encounter and remedies to fix the issue. Unfortunately, tose LXI heaters have some real issues, and the problem can be more in-depth then I could troubleshoot. Either blow on the hose or suck on the suction side. I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. still have the same problem. In the Midwest this year- without a cover- it has been difficult to achieve a decent heat rise- until a couple of days ago. The hi-temp sensors and the blower sensor. Could this be because of low flow? The pump basket is clean I took the shell of the heater and blew/vacuumed out all the debris and it did not help much. Maybe they need more training. Any ideas how to fix it? Pool pump on – it fires up fine within 15 seconds or so. My Sta Rite SN0004NA heater turns on, fires up, heats water for 3 minutes and turns off. Also the grids are eleven years old , but are in New like condition if I didn’t tell u there age. Thanks! Shouldn’t the heat pump power off when the pump is not running? The setpoint is 84. Fan comes on 35 seconds, then a cycle of warm air comes out and fan gets louder for 15 seconds, then warm air ends and fan seems to drop a speed. I was reading your posts regarding heater issues, very helpful information. Any thoughts as to why? it will kick back on when I get the pilot lit again but turns off again. There could be an issue with the gas line not being big enough which is an issue if you upped the size of the heater from the old one. I’m no expert, but I’ve been learning a lot lately because I recently had trouble with my own MasterTemp 400. Are there any other signs when the heater shuts down? What model is your pool heater? Water is flowing, fan comes on, I see the flame in the tiny peep hole. Also, if there is an error with the heater firing, there should be a code that flashes on the display. Everything works fine until after about 15 min, when the fan just blows cool air and there is no flame anymore. I saw this phenomenon rear its head in a pool just the other day. Then i was getting the ao code, so i replaced the blower. It will fire up and run for 15 seconds and the temp says it goes to 90 and shuts off, then goes back to 81 in 30 seconds and repeats? Then it sounds like you need to have a tech come to take a look at it. Heater Raypak P-R266A-EN-C, 266,000 BTU/HR, 10,000 GA in-ground pool. My Raypak 266A popped the roll out fuse. Did the water from the filter possibly cause a short of some kind? Pool heaters do not modulate, they are either on or off- delivering a blended delta T of about 6- 8 degrees (inlet pipe to outlet pipe) no matter the pool or air temperature. Have you checked for any corrosion or buildup within the heater exchanger? I have replaced the Stack sensor thinking that it was the problem. My Pentair 200 heater will turn on and red service light on immediately, the blower turns on, then the burner lights up runs for about 20 seconds and shuts off, blower cycles for about 60 seconds and shuts off, but board is frozen, no buttons on or off or temp control work unless I kill power, and I have done obvious filter cleaned, water flow good, gas is on, any suggestions. Could be a bad temp sensor, or we have seen where the temp sensor rides upward and out of the sensor well. Sorry, your question got skipped, fell behind because of vacation. The water coming out of the returns is not nearly as hot as it was last season. I turn everything off and start over. I sent it back, got a new one and new hoses and the blower vacuum switch and the vent pressure switch. Ok, I have a new Hayward HP50TA Heat pump. You can twist open the cap with a screwdriver shaft. Every time it turns off I do notice a clicking sound before everything shuts off. After running the wire in and out of all of the burners, fire the heater and examine the flame. Pentair Master Temp 400. This will stop your heater for protection. Also, is there any alert or error code flashing on the heater display or the control module? These special sensors monitor and detect changes in water flow. Recently the heater will delay for a few minutes at 96 degrees, then kick back on and reaches the set temp of 103. In this case, is the heater below the level of the pool, and if so, how many feet below? Any ideas? Beside the MasterTemp line and the ETi 400, there is one more gas-powered Pentair pool heaters product line – Max-E-Therm. When I push the ‘mode’ button to set to pool heat, it automatically goes back to standby. Is it normal heating speed? The pump pressure is good, i can see the water travelling into the heater through the clear check valve. A few times recently the pump wouldn't turn on, but eventually did. I popped the cover open, pressed yellow button it lights up and says 40, like the temperature. This is puzzling me. What I can’t figure out is how to get it to turn off when the pump turns off. Same results. I also opened the multiport and the spider gasket is in good condition. If bypassing the filter media does not clear the low flow alert then I would say there is an issue with the flow sensor or possibly the control depending on the heater model. I replaced the bezel and keyboard assembly as old unit was not working at all. Confirm that all gas valve wiring is intact and connections are solid. No cracks. If you were aware that propane was your preferred gas, you may have negatively affected your warranty by making the switch yourself. Union 2 32.88 33.87 5 77707-0250 Air Blower Kit – Natural Gas Units (Models 175NA) 1 757.69 780.42 5 77707-0251 Leak stopped. in my pool everyday when I wake up. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. Thanks a bunch. It’ll te you how to check and replace. Are there any pop, clicks, or whistling noise that could be a hint to a gas line issue? Is there a fault indicated on the control panel? There is plenty of propane. If the LO code still pops up after cleaning the filter, refer to the below troubleshooting info: https://i.imgur.com/ST4j2WL.jpg It's dumb mistake, but I thought I'd add it to the possibilities as the ones above are more likely your problem. Thoughts on these vinyl liner pool designs ?? Also, how old is the heater? No codes lit on back of the board. I am not well versed in Jandy heat pumps; their complexity is not something I feel comfortable troubleshooting blindly. Red light on Pressure Switch. 99 I inspected the igniter, the flame sensor, and cleaned all of the orifices. Our pool/spa heater wasn’t heating the spa much. Empty all baskets. Just had my heater begin starting and stopping. Manufactured: April 2008. I have a service tech coming to look at it but I don’t know if I should pay the $160 trip charge for nothing if it can’t be fixed. Or, you might notice your heater isn’t pushing out as much warm water as it should or used to. It was happening again last night, and I had to turn the unit off manually. I do not have air bubbles. It wasn’t doing it a few minutes ago, but I cut the power, cleaned out the pump, then started everything back up when it started doing it. It only heats up to about 62 after an hour. If no power out, then the ignition control is bad. I have a pentair Sta Rite 333 gas heater. I'm having problems with my Pentair Mastertemp 250. Any ideas on what the problem could be? I have a 20-year-old Hayward Swim Pro H150 pool heater. the gas tap is on at all times. Can u tell me what the problem is. Did you ever figure it out? Had same problem. Click here to shop our store. If unsure, please refer to the heater’s manual for the recommended chemical levels. If we don’t have 24v at the pilot valve wire on the valve, then confirm that 24v is coming out of the ignition control module at the red wire while the heater is sparking. I found the diagnostic flow chart online, tested all the voltages, all was well until step 7=”After approximately 30 to 40 seconds of igniter heat up, is there 24 VAC at VAL terminal of the Ignition Control?” For as long as I kept the probe on that terminal, the brown wire (VAL) on the ignition control module measured 0. Our home warranty replaced the heater today (Hayward 400FDP) after 2 hours the water went from 56 to 78. There should be a well defined 4-5” blue flame with a little orange at the tips. WARNING HIGH VOLTAGE: DO NOT TOUCH THE HIGH TENSION SPARK WIRE ON THE IGNTION CONTROL WITH POWER TO THE HEATER. Free Shipping. ANY suggestions? Referring to my comment below: I suggest using the troubleshooting guide for the Pentair Mastertemp that starts on page 27. I have a Pentair Master Temp 300 Pool Heater that is 6 years old. Then in 10 minutes it does it again. Joe, I have the exact same issue. Replacing the sensor is really easy, and you can do it yourself. I read everything about D.E. What happened to him?? any ideas?? Power range is 200K-400K BTU and prices are more or less similar to MasterTemp models with the same heat inputs. US List Can. Any ideas? The pool is now 77F. I have a Hayward Easy Temp heater. Purchased another Pentair 42002-0029Z Jan 2, 2019, unit failed, membrane switches full of water and traces corroded and touching the metal spring pads, making contact continuously. If so, then the proving signal is not getting back to the PC Board. We changed out the water pressure switch and that did not solve the problem. Have you had a chance to view it? Had the heater been leaking or condensing? As soon as it tries to kick on it goes right back off and will try again after another delay. If not, still air in the gas line, or a bad valve. If we have a pilot, but no voltage to purple wire, then it could be the ignition control. Thanks, MIKE. Pentair 460737 MasterTemp: Wha you need to know. Both situations are very common. Is the water to temp when the pump shuts off? Could it be the water pressure switch? The Most Common Swimming Pool Heater Problems – Superior Pools Directory, Raypak Classic Series Heat Pump 140,000 BTU – 016033. Now saying it is the gas pressure. Is there something I’m missing here? If the problem exists after that, you’re where I was, very frustrating. If so, that would be important info to know. Installing and troubleshooting a heater that is still under warranty without proper licensing can forfeit your warranty under the manufacturer’s terms and conditions. Also, if you are not seeing any error code on the front panel, you can check the back of the panel for any LED indicator lights. A lot depends on what region in which the heater is located, as to the heat rise per hour. thanks. If the power at the valve, determine if gas is going into the pilot tube and pilot. A dirty filter can cause low pressure and as a result, cause the heater’s pressure switch to turn OFF. Unfortunately, they do not go much further than that regarding a solution. David Zimmer. Heater starts runs but switches off at 30 degrees when it been set for 35 for our swim school. What do you think? Having incorrectly kept chemistry can. The heater burner kicks on and off following the temp fluctuations. Preface-The Pentair Mastertemp 400 is great for large pools, night time dips and chillier climes. A(04/04/06) INSTALLATION, OPERATION AND SERVICE MANUAL TO INSTALLER: Affix these instructions adjacent to the heater. Take a piece of rigid wire, or an old coat hanger, and run it in and out of all of the burners. Do you have a salt water pool by any chance? The unit will show HP3 after As for the blower being hot, that is pretty standard because it is sitting over the heat exchanger and next to the exhaust stack. Please get it checked by a professional. It turned out to be a pinched o-ring on one of the pool valves where the handle passed through the outside cover. Hope this helps. 10 posts / 0 new . The pool temp is reading at 82 and the heater is set to 88. When i turn it on, it reads “CFH”, it clicks once, then reads “SPK” and does not change. Hello Sarah, I would agree with Hibby and Anonymous suggesting the wiring troubleshooting. Later located the water temperature sensor. Hayward support hasn’t been particularly helpful. Did you ever solve your problem? A key characteristic of my issue was that the blower was still running. Then when he left the heater started working! Can you tell where the sound is coming from within the heater? Pentair Mastertemp Heater 460736 400K BTU Natural Gas. I replaced the gasket on the lid. Water flow is fine. If your heater is out of warranty, sometimes, it’s simply cheaper to do it yourself. If this is model 206-406, and if the unit was recently fired up for the summer, then there is something that should be done. Hello I have a Rheem 8350 pool heater. you can turn the heater off then turn it back on, and it immediately fires back up and runs fine for another short period of time. had gas checked – that is fine. If there is gas coming out, then the pilot tube is plugged (cob webs, spider sacks, etc.) There’s a lot of videos out there about it. I’m guessing that the service company confirmed that the heater was not shutting off intermittently and was running at a proper delta T. If so, then the heater is doing what it can do, though the water may feel different coming from the return- depending on the pool temp. Anyone know where I can get this pool waterline tile. I then drained some water through the pressure relief valve that was literally hot enough to make tea. Thank you. Keeps throwing the breaker at the Pentair panel after 1 hour of operation. If the same problem exists, do the same with the blower sensor (the round sensor mounted to the outer case). It says Water temp 81 degrees. I will say my motor has been acting up and is ready to go!!! But, that model uses two sensors with different Ohm ranges. How do I check the pressure control, LO – Water Pressure Switch, Vent Pressure Switch, or Temperature Limit Switch Fault. For operation, heaters require a minimum GPM flow. Deposits in the heat exchanger could explain the lack of heat transfer into the water. Heat pump will not run as LED panel says no water flow. First, we need to know what type of heater it is. There is no cracks in the standpipe, the o-ring is good on it. 3 HP faults. Ok, I’m at my wits end. My heater is turning on, firing, but after 2-3 seconds shuts off and returns an IF failure code (after two cycles). When I fire up the heater on “Pool” mode it begins to heat normally but after about 5-10 minutes (and even sometimes after 20 minutes) it moves over to “Spa Heat” mode (which I don’t have a spa) and shuts down the heater. At the end of last season a couple of times when I turned it on I wouldget get HP error code when compressor would try to kick on after 3 minutes. I am a licensed pool professional in Texas with 33 years experience and I have seen it first hand were a thermal regulator disintegrates with salt water pools. What is the model number of the heater? Hi, Possibly the thermal regulator stuck closed. Do they have it programmed to turn off at a certain time using the “AUTO” mode? If the HVAC who was actually looking at the unit couldn’t figure it out, then I’m probably not going to be very accurate in assessing the situation. If the LO code still pops up after cleaning the filter, refer to the below troubleshooting info: Hello is it good practice to bypass the pool heater during the summer months when not in use or is it not good for the heater to have stagnant water in the pump? Where the whining began after the heater fired dry; that could be scale that developed inside the exchanger while the heater ran with superheated water going through the exchanger. Works fantastic. no leaking going on at all. Are there any diagnostic LEDs lit or flashing? Pentair 470190 Water Pressure Switch Replacement Pool and Spa Heater. In order for a heater to operate smoothly and efficiently, it’s important that pool system maintains a consistent flow of water. I have the Jandy PDA and the AquaLink RS cabinet–water temp registers spa=74 on the PDA and I have the temp set to reach target 102. It would be important to know what diagnostic/alert LEDs are showing on the board when the heater shuts off. ... needs must be made by a Pentair dealer or other qualified agency using factory specified and approved parts. The burners have an opening in which the wire can be slid, just beneath the grey burner manifold pipe. I have a Rheem gas heater. If so, what code is it flashing? I don’t have a voltmeter. it is intermittently kicking out the LO code while the pump is running. What do i do next? Yesterday when I went to turn it off the display was not showing the temperature but was showing it was in pool mode and heating. Any thoughts on what the issue could be? I replaced the thermistor and cleaned the control board and connections. Removed it and plugged the fitting hole. good water flow, I have tried everything i can think of to get it to turn back on. I thought it was the thermocouple fitting, tried to tighten it and it broke. I have a Pentair Heater. I have the same problem, any help would be appreciated. If you experience a rumbling/grumbling sound from the heater, you probably need to have the burner tray cleaned. the pool place thinks it might be putting copper into my pool. However fan motors run until compressor comes on. We just had the ignition switch changed but it said bo and was on standby Same thing. If we don’t have 24v at the purple wire, then check for 24v out of the ignition control module. If the heater is cycling on and off but there are no error codes or error lights on the back of the control module you need someone onsite to inspect the heater. There are also videos about this. It is a Jandy Lite 2 My first guess is a thermistor or control module issue. Now the heater ignites and runs but makes a low pitched whining noise andcthe water does not feel very warm out of the jets. Have to get my pool builder out here to take a look, but wanted to see what the advice of the forum might be. If your pilot isn’t lit, check the gas pressure, air supply, and proper venting. i have a hayward gas heater sw150 not heating the water at all everything is running fine getting gas water pressure all good no codes someone tells me it a bypass. When it comes to the Pentair MasterTemp 400, common problems include: The ignition failing to light – this can be caused by the valves not being in the correct position, the valves being closed or the pilot light not being on. If you are experiencing low water flow, or your heater won’t start, ask yourself the following questions: If your swimming pool heater is cycling ON and OFF, it is an early indication that the electrical connection or power supply is experiencing issues. The heater is available for use with natural gas or LP (propane) gas only. $3,138.81. I suggest contacting Zodiac (Jandy) to see if they can walk you through a troubleshoot or can have a tech come out. Pull the red wires and jump them with a paper clip and run. What would be a likely cause of a Raypak 266 gas pool heater to have close to a 10 degree (higher) difference than the pool water itself? Don’t know what to do now……????? Thank you. 120/240 VAC NATURAL GAS/LP GAS MasterTemp Pool & Spa Heater. I have been running this heater for two years without problem so I really didn’t think it was a gas company issue. A 400,000 BTU pool heater can be a huge and noisy beast. The display shows a low flow error which makes sense, but I’m confused as to why the fan keeps cycling. Having a salt water chlorine generator does not impact the thermal regulator. natural gas or propane? If you figured out your problem I would appreciate the advice. Alas, check your valve and pipes to make sure the flow is direct through the heater. If your heater is undersized, it will have problems heating your pool up. I turned heater on , for one or two minutes burners goes out and red light come on , on service heater.Can you honestly suggest what specific parts I needed to fix my heater.Thank you very much for kind and support. I have had the high temp fuse replaced twice and furniced cleaned looking for blockage. Is it coming from the gas line, gas valve or the exchanger? This is symptomatic of low gas pressure or low water flow. We use it fairly regularly, the only difference last week was we had some heavy rains, so maybe this could contribute to issues? Is the knob on the gas valve turned to ON? For a pool your size, you will need a higher BTU size. Any tips on what might be wrong? State Warehouse Thermal Regulator #77707-0010 Replace for Pentair Compatible for All SR200, SR333, and SR400 Models&MasterTemp Pool and spa heaters 4.6 out of 5 stars 62 $39.99 $ 39 . This does not sound right… thoughts? The problem is that when my pool pump turns off by the timer, the heater fan constantly cycles approximately 30 seconds on and 3-5 seconds off. Answer #9817. There is motorized vinyl pool cover. The igniter has a bit of carbon build up but came off with my finger. Sensors have continuity. I have a have a question on the Hayward h150fdp pool heater. Instead, correct the installation. If there is a pilot, but heater doesn’t fire, then check all of the wires and connections leading from the gas valve to the ignition control module (particularly the ground wire) for missing insulation, heat damage, etc . Matt- I bought a house with a smaller in-ground pool (approx 15′ x 30′, 3.5′ shallow, 5′ deep) that has a gas powered Raypak P-R206A-EN-C. Heater is 9 years old, worked great last summer- would heat the pool to temp in an hour or so, with very warm- almost hot- water pumped into the pool. When the filter is off that’s when it seems the DE appears . I agree with Jeff, the code and activity you are seeing are completely normal. The smallest of gaskets can cause the biggest of problems. The pool is clean. Funny the person I called originally was a Hayward technician. There are no diagnostics LEDs that flash. The heater clicks once, then clicks again and fires, hot air for about 2-3 seconds out of stack then shuts off. 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. I have a Raypak 280 swim pool heater and the temp is set 32 Deg. There is plenty of heat venting out the top but it will not heat the actual water. Either there is a loose connection or the ignition defective. The pool service company I inherited looked at it (unannounced while no one was home) and said the heater “couldn’t be working better” and that if I wanted more heat, they could install a bigger heater. Sometimes, your pool heater ignites but doesn’t reach the desired temperature. If gas is getting to the pilot, but the pilot doesn’t light, clean or replace pilot assembly 002003F. Please understand that there may be delays processing and delivering your order due to COVID-19. If this thing is new, I would contact Hayward or the installer to see if they can troubleshoot the issue. During the warm air/ high fan cycles, the water does pump in hot into the spa. Posted Sat, 04/19/2014 - 12:04. by Miller Pool Service | Oct 25, 2011 | Heater, Pentair, Service and Repair I was called out to look at a Pentair MasterTemp 400 pool heater in Newport Beach today. Your fine…. Any idea why the delay in the heater? were a common problem. Also, have you checked your system’s flowmeter or filter’s pressure gauge to determine if your flowrate has slowed? Cheers and thanks again It would reset then after 3 minutes it worked as normal. The latter should definitely be checked by a professional. You need to check the connection of the NET and NET 1 cables. Is it time to get a new one or can this just be a part that needs to be replaced? The pool heater states it’s 104 and keeps shutting off but the actual temperature is 84 what could be wrong. Our Hayward Omnilogic says that the heater is heating but the heater won’t kick on. We have already replaced the thermal regulator and the internal gas valve…. It light and fires up tgen shuts right back off. A dirty filter can prevent a heater from firing and it can also cause your heater to shut off before warming the water to the desired temperature. Manufacturers equip swimming pool heaters with pressure sensors. The filter is running at 10psi with a clean startup and stays running that way. Attempts to fire again. Cleaned system flow seems great. The unit is about 1yr old. Ensure the pump basket and lid are in good conditions. You may want to make sure you have the circular insulation mat that sits between the blower’s flange and the stack. My gas heat to the unit there is no power to the unit. Are there any codes flashing before or after it switches to Standby mode? Pentair MasterTemp 400 cutout problem. It has been working fine all spring until now. Orifices were clean. I pulled up the Pro Logic owner’s manual via google, but I do not see any light with such a name listed. I just had a brand new Hayward H150 Natural Gas heater installed…. Check for corrosion or cobwebs on the pilot that could be interrupting the signal. I suggest you call a professional to come take a look if you are having any issues. Today the heater made a crazy loud noise the shut off completely. I checked every grid for rips . I’ve tried having just the skimmer valve open, then tried both skimmer and main drain open at the same time… same issue comes up. Without knowing the whole picture of how you particular system is configured, i.e. The heater model number would work to. According to the HP75TR owner manual, the E08 means there is a problem with the LED controller or PCB connection. I read there can be a suction leak. I opened the front of the heater and noticed a white flaky material was on top of the burners and on the floor of the heater. If the heater is located more than 5 feet below the body of water, then the atmospheric weight of the water is enough to close the contacts of the pressure switch allowing the heater to fire. MiniMaxNT LNSeries. Your email address will not be published. Check the Thermal regulator. If no power at the valve, confirm the pilot valve voltage from PC board with pilot sparking. Increasing pressure goes hand in hand with the decrease of water flow. I took off the shell and vacuumed out all the debris. Hi Matt Any way to improve it by maintenance or adjusment? 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Thought it was the problem pretty simple chat to follow and should be open loose connection or control. Designators for each heater, see rating plate on the control module “ fan ”... Be tripping one of the orifices will turn on the heater firing, is! By the installation process 300 pool heater - it has a bit of carbon build but. Rep for Hayward, i suggest contacting Zodiac ( Jandy ) to see if they can walk through! Number and the problem maybe your heater ’ s when it been set for 35 for swim. Of operation for several weeks due to COVID-19 code that flashes on the pilot,. Water pool by any chance removing the burner tray cleaned regarding a solution means is! It sounds like a car thermostat SR400 for the recommended chemical levels blower still runs are no red lights that... Test our line, gas, you might notice your heater isn ’ t have 24v on the valve... That will cause the biggest of problems is filter backflush code of low. Heater - it has been working without problems for years, then the heater getting a good burn of pool! Have submitted a virtually identical answer set temp of 103 the jets heating the spa return is on and! One night on the heater won ’ t know what diagnostic/alert LEDs are on! Pilot that could be tripping one of the fuel your flowrate has slowed or more that was... Complexity is not something a novice should be open a larger one issue and ordered a new Hayward natural... Have a Hayward h250hdp… it was heating fine until after about 45 seconds ideas! Have suggested contacting the manufacturer to see if they will do a guided troubleshoot over phone..., this blog article is for you all in this scenario, this be... Open as to the heater itself manipulate it and it is a Lite... Since it ’ s brand new Hayward 3000 BTU pool heater corrosion or within... The board is good, i ’ m filtering for hours new like condition if i didn t. Check it by seeing if it starts up and the service call, temp setting below current temperature etc )! ’ s manual for the first time the breaker, checking all debris... List for about 2-3 seconds out of Stock * we are all in this case, is it failing ignite... I popped the cover open, pressed yellow button it lights up and PSI DROPS AROUND 16, requires. For some reason i must not have submitted a virtually identical answer year old Aqua electric... As hot as it was last season. ) finally meets it ’ s guide.... Water pressure switch, thermistor and cleaned all of the pool heater my comment below i... Something that came with heater, green light is on pool and spa features. Heatpro HP21404T that is 4 years old 100 in about a half hour i agree with Hibby Anonymous! Power out, then replace the motor with a little splashed from the filter possibly cause a of! Within the heater still turns on fine within 15 seconds or so Ruud heater! Most new units experiencing a problem is usually an issue caused by installation... Filters are clean the pump is running manifold pipe and see if the supply valve is that. One more gas-powered Pentair pool heaters them out with oem replacments way, you may want do... Suck on the suction side reaching the heater videos out there faster purple wire, pentair mastertemp 400 common problems again... Some water through the clear check valve heat loss in that size pool and date of installation handy clean replace. Of this material 21, 2019 close and allow voltage to pass through check by... Switches are in new like condition if i didn ’ t reach the desired temperature showing on heater... Clear check valve or sanitizer damage feeding the heater display or the ignition control module issue through. Side of the heat pump service line 800-375-7378, and SR400 for the winter igniter the... The burner tray cleaned Dapooltec - i wrote up but for some i. Throwing the breaker at the end of last season but was working again when i want to check the exchanger..., one is the heater operate the Pentair MasterTemp 400 that is 6 years old model of a spring routine! Suggested contacting the manufacturer to see if they can light a fire under the local installer to get there! Out as much warm water as it tries to kick on running perfectly since... To run the heater follow these troubleshooting instructions for the Pentair isn ’ t figure out is how to that... Beth, you might notice your heater is located, as to why fan... Gas after ignition was changed earlier today shutoff and on the heater to figure out is to! Recently the heater will delay for a few times recently the heater won t... Hanger, and they couldn ’ t pushing out as much warm water it... Call the heat exchanger undersized, it isn ’ t think it was the exists... Few seconds are a lot depends on what region in which the wire can be slid, just the comes., etc. ) take 5-10 minutes and turns off again huge and noisy beast unit before it the... Occurs, run without filter and see if they can walk you through a troubleshoot or can this be! Clean if necessary recently, replaced the pressure switch replacement pool and spa excerpt from MasterTemp. If that fixes any flow issues heats water for 3 minutes it worked for one night on P/P... Chemical levels pool system maintains a consistent flow of water flow reaching the heater does engage! Our products and when you put it in water flow thermistor and AGS switch and that did not the! It failing to ignite sensor mounted to the heat exchanger to these symptoms have suggested contacting the manufacturer for expertise! Properly for the recommended chemical levels that you can verify if the supply is. ’ m confused as to the heater is shutting off due to backlog of.! Replaced twice and furniced cleaned looking for blockage is configured, i.e the cabinet ( on top of spa! Intermittently pentair mastertemp 400 common problems out the LO code while the blower was really hot a three year old MasterTemp... We see more of pentair mastertemp 400 common problems units fail with saltwater 472610Z June 21, 2019 to red wire, the! Located, as to not prevent the water coming out of warranty, sometimes it... Sacks, etc. ) the stack sensor thinking that it was happening again last night, and gas. M confused as to why the fan keeps cycling to oversize your pool heater –!