There is a way to check that the PC board is reading the right range. How do I check for a stuck t-stat? Inspect the pump and filter and clean if necessary. Any ideas? Check for 24volts at the pilot valve- red wire on gas valve. If the same problem exists, do the same with the blower sensor (the round sensor mounted to the outer case). Pentair 470190 Water Pressure Switch Replacement Pool and Spa Heater. I changed out the gas valve and it’s been running perfectly ever since. Use the up/down arrow and it will respond. Also the grids are eleven years old , but are in New like condition if I didn’t tell u there age. Heater was off for two weeks in our holiday period, Was the air bled from the gas line? The manifold also has no cracks in it. I have replaced the Stack sensor thinking that it was the problem. 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 should I do? Honestly, this is a very common occurrence. My heater (pentair )is reading 94-96 degrees ( did read 104 earlier this afternoon but came down to 94 when I turned unit off then back on again) but is set at 80. Stay well. If we have 24 volts out of the ignition control but not at the valve, then the wire or connections are bad. Whether you are in the market for a brand new heater or Pentair MasterTemp 400 parts, The Pool Guy Store is ready to help. Are there any other signs when the heater shuts down? The pool is now 77F. ... needs must be made by a Pentair dealer or other qualified agency using factory specified and approved parts. Can you tell where the sound is coming from within the heater? I would contact the manufacturer for guidance on the next step because there isn’t much info on this heat pump. I got everything installed and the heater starts and fires up and the shuts off and gives a IF code. Hi Beth, you may want to check your pressure switch. I have a Hayward Titanium Heat pro model HP21104t model heat pump. 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. Also, is there any alert or error code flashing on the heater display or the control module? The Mastertemp has an alert or error code display on the control module. After running the wire in and out of all of the burners, fire the heater and examine the flame. Did you try troubleshooting the power source or the circuit feeding the heater? In these cases, code requires a flow switch to be used in lieu of the pressure switch. Either way, you shouldn’t be on the hook for paying to get it serviced under warranty. Took out my cartridge filters and cleaned them. I have a Ruud spa heater and it fires ups but then says “fan delay” and turns off within 10 seconds. Any thoughts? If we have 24 volts at the valve, then the valve could be bad or stuck. I've had numerous propane heater clients call with similar problems only to realize they were low on their propane. The hi-temp sensors and the blower sensor. The filter is running at 10psi with a clean startup and stays running that way. The heater burner kicks on and off following the temp fluctuations. 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 don’t have a spa) and shuts down the heater. The blower will go through a cooling cycle and not come on again. Heater starts runs but switches off at 30 degrees when it been set for 35 for our swim school. If the power at the valve, determine if gas is going into the pilot tube and pilot. For MV heaters, if the pilot won’t stay lit, check the output on the thermocouple. I am not well versed in Jandy heat pumps; their complexity is not something I feel comfortable troubleshooting blindly. Confirm by disconnecting the pilot tube from the gas valve- when the heater is sparking, there should be gas coming out of that hole. I just had a brand new Hayward H150 Natural Gas heater installed…. The heater will stay on and keep running continuously up until say 82 degrees. I have a Hayward heater and ProLogic unit that operates all equipment. Recently the heater will delay for a few minutes at 96 degrees, then kick back on and reaches the set temp of 103. The pump basket is clean Again, I am experiencing the same issue from last fall. Outside temperature mid 60’s. Then after 10 minutes or up to 1 hour the heater turns off! Are there any error or fault codes flashing on the control board? ... the builder wanted to use Hayward and after some research i decided i'd rather go with Pentair so naturally he wants nothing to do with it, its my problem. Heater Raypak P-R266A-EN-C, 266,000 BTU/HR, 10,000 GA in-ground pool. (It’s an in ground, in Georgia, was fine last year. Any thoughts as to why? Will heater go into standby mode when pump shuts down from timer? I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. The water coming out of the returns is not nearly as hot as it was last season. Hi, got a Hayward HP75TR, ’bout 3 years old now. it will kick back on when I get the pilot lit again but turns off again. New start this year, I put the breaker on, everything went on, i put my temp setting on my LED panel, and its a go. Sorry, your question got skipped, fell behind because of vacation. This year when I tried using it for the first time the breaker would trip every time the compressor would try to kick on. Thank you in advance for any insight you may have on this. Sounds like it could be coming from the refractory panels that make up the fire box. Pentair 460737 MasterTemp: Wha you need to know. You need to check the connection of the NET and NET 1 cables. Would love your thoughts! Close water features, or alternate them, until the pool heats to the desired temperature. What should I be looking for? So too, can a low flow condition, whatever the cause of that. Manufacturers equip swimming pool heaters with pressure sensors. when I want to use the heater I have to physical press the buttons on the heater! It has been working fine all spring until now. 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. The setpoint is 84. jgehlhaar. Hi Matt, any advice on my question from June 4 about the Jandy Lite 2 (Model #: LG175N)? My gas pool heater shut off because of no water flow. I replaced the bezel and keyboard assembly as old unit was not working at all. I have a Raypak 280 swim pool heater and the temp is set 32 Deg. I have replaced the Stack sensor thinking that it was the problem. 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. One side is suction and the other is discharge. Replaced Pentair unit that came with heater, 3 years old. If the LO code still pops up after cleaning the filter, refer to the below troubleshooting info: https://i.imgur.com/ST4j2WL.jpg 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. Out of Stock *We are all in this together. Knowing the make and model of a heater can narrow the possibilities of what is causing the issue. Don’t know what to do now……????? What is the model number of the heater? The NJ in your name most likely indicates that you are located in the north were salt water generators run at a lower percentage rate and you don't see the damage to the equipment were here in Texas we have to run our generators at a much higher percentage rate year round to maintain proper chemistry causing the parts in the system to fail faster. Your email address will not be published. Have a Pentair Mastertemp 400 that is about 10 years old. Then when he left the heater started working! Any ideas? Try to reset the heat pump still same problem and my LED panel doesn’t respond anymore! Description Qty. Did the water from the filter possibly cause a short of some kind? Replacing the sensor is really easy, and you can do it yourself. Inspect these parts for corrosion, scaling, and/or any electrolysis issues. But, that model uses two sensors with different Ohm ranges. any ideas?? For example, in some cases, you will see a “Low Water Flow” warning pop up on your heater’s LCD screen. it is intermittently kicking out the LO code while the pump is running. I’d fork out the money for the service call. I have a Pentair Heater. Or if F2, F3, or F4 is coming up then it is a sensor problem. Gas was checked on line and no leaks, correct settings per model instructions. Also, have you checked your system’s flowmeter or filter’s pressure gauge to determine if your flowrate has slowed? I have a Pentair Master Temp 300 Pool Heater that is 6 years old. 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. Test your water before adjusting your chemical levels. Currently it’s 65F outside. My Pentair Mastertemp 400 work for a few min and then cuts out. Same results. This Pentair® MasterTemp® & Max-E-Therm® Repair Kit includes all of the most common replacement parts for your MasterTemp® & Max-E-Therm® swimming pool heater. It used to heat to 100 in about a half hour. To touch it is obviously not at 94. The hoses looked like they moght be melting. Beside the MasterTemp line and the ETi 400, there is one more gas-powered Pentair pool heaters product line – Max-E-Therm. It is keeping ready in case the water flow comes back and it can resume heating. Spiders sometimes get into the burners and leave sacks behind. If this thing is new, I would contact Hayward or the installer to see if they can troubleshoot the issue. Background. Apart from being arguably the greenest pool heater (excluding solar), the Pentair 460805 MasterTemp has a lot going for it. Is it coming from the gas line, gas valve or the exchanger? I saw this phenomenon rear its head in a pool just the other day. And yes we see more of these units fail with saltwater. Are there any diagnostic LEDs lit or flashing? pump, filter, chems, etc..., anything suggested here would be nothing more than speculation, not unlike asking why a car won't start without any extra info given. I’ve checked flow, gas, etc. Pentair MasterTemp 400 cutout problem. 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. Filter PSI reads 11PSI (normal post-backwash PSI is around 10). Ensure that the thermostat is set to a higher temperature than the current water temperature. The heater only comes on if it’s turned all the way up. It would be important to know what diagnostic/alert LEDs are showing on the board when the heater shuts off. MASTERTEMP® HEATER (CONT’D) BURNER SYSTEM REPLACEMENT PARTS Item Part No. 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. 99 Sensors have continuity. We left our pool heater on last night and forgot to remove the pump timer switch so the pump turned off but the heater was still on. It’s normal to say no flow and hibernate until the pool motor comes back on. put on new high limit switch, thermistor and AGS switch and still the same results. The heater could just be dirty and in need of a thorough cleaning. Confirm that all gas valve wiring is intact and connections are solid. I would appreciate any information to fix this problem. If there is no power to red wire out of the ignition control, then replace the ignition control module. I think thats what they are calling a thermostat above, cause they look just like a car thermostat. A key characteristic of my issue was that the blower was still running. If no power, replace the board. The display shows a low flow error which makes sense, but I’m confused as to why the fan keeps cycling. Sometimes, your pool heater ignites but doesn’t reach the desired temperature. Having a salt water chlorine generator does not impact the thermal regulator. If this is a seasonal pool, and the unit operated normally at the end of last season; then its quite likely that the pilot tube is plugged or the burner tray needs to be cleaned. Gas was checked on line and no leaks, correct settings per model instructions. I have a Sta-Rite Max-E-Therm 333 Model SR333NA. This is my go-to heat pump model. L 8-12-14 4 To identify the heater, see rating plate on the inner front panel of the heater. If possible, replace the motor with a larger one. The orings on the P/P or the diverter spider gasket are bad..change them out with oem replacments. Later located the water temperature sensor. Replaced with this Pentair 472610Z June 21, 2019. If your heater is out of warranty, sometimes, it’s simply cheaper to do it yourself. It developed a fitting leak on the outlet side of the heat exchanger. Pentair Mastertemp 400 ignition problem. I guess this removed fitting has something to do with detecting water flow thru the heat exchanger. Raypak Atmospheric Digital RP2100 Heaters 206A, 266A, 336A, 406A (11/01/04-Current) Parts Diagram. If you don’t want to do that then you can always just jump it out. My heater is turning on, firing, but after 2-3 seconds shuts off and returns an IF failure code (after two cycles). If the heater is not flashing a code, then you may need to contact Pentair for a service call to figure out the deeper-lying issue. It would light and heat the water for say about 1-2 minutes, then cut out, blow the fan a bit, then relight. 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 . Make sure you have installed the temperature sensor correctly and it is in good condition. no leaking going on at all. Our home warranty replaced the heater today (Hayward 400FDP) after 2 hours the water went from 56 to 78. We always recommend to oversize your pool heater to minimize the time it takes to heat your pool. I have the heater set to 102 and it is starting at 60. Everything seems to be working fine, with the exception, that the heater is always ON. Pentair 460776 MasterTemp Heater 400BTU LP Low NOX ASME. Please get it checked by a professional. 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. In this blog article, we cover the most common swimming pool heater problems a pool owner might encounter and remedies to fix the issue. It fires up fine again then the same thing happens. I have a Raypak RP2100 heater. I suppose this must be calcium or something that came from heat exchanger? Every time it turns off I do notice a clicking sound before everything shuts off. Deterioration of the heat exchanger can impact your heater’s operation. I have a Sta-Rite Sr400HD gas pool heater that is about 8 years old. The heater model number would work to. Compressor turns off. When the move the thermostat dial higher than the actual water temp the fan comes on as normal. Have not tried to jury rig a fix as I have the broken fitting. I have a pentair Sta Rite 333 gas heater. The heater works the SHUTS off given a LO ERROR. Same thing. Also, if there is an error with the heater firing, there should be a code that flashes on the display. MasterTemp swimming pool heater pdf manual download. The sacks are round and sticky, so cannot be sucked or blown out. How long after the flame goes out does the blower run? Same thing. Clicks constantly trying to light for several minutes. Did we ruin our new 2019 jandy gas heater? Thanks! Heaters are not something a novice should be troubleshooting, given the complexities involved. The unit is about 1yr old. had gas checked – that is fine. 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. I read there can be a suction leak. Could this be because of low flow? I have an old Jandy gas pool heater. So why I’m I finding light grey D.E. If so, that would be important info to know. Now it won't turn on at all. I had this same problem. This goes on and on until the heater finally meets it’s set temperature. 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. My Raypak 266A popped the roll out fuse. Water from the jets didn’t feel much warmer than the spa water. Check the Thermal regulator. If there is no gas coming from the energized pilot valve, replace valve. Is this part of the problem? What do you think? We carry a wide variety of MasterTemp products and are here to answer all of your questions. I have a Hayward Easy Temp heater. everything else has power except for the purple and two white wires going into the ignition switch, which is in the on position. If it is not flashing any error codes then I would say there is an issue with the circuit. This is symptomatic of low gas pressure or low water flow. Without knowing the whole picture of how you particular system is configured, i.e. There are two designators for each heater, one is the Model Number and the other is the Heater Identification Number (HIN). Hi Matt 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. Possibly the thermal regulator stuck closed. A 400,000 BTU pool heater can be a huge and noisy beast. if that is missing or deteriorated that could be causing your overheating. Thinking motherboard or gas valve. Installing and troubleshooting a heater that is still under warranty without proper licensing can forfeit your warranty under the manufacturer’s terms and conditions. Easiest way to diagnose this? We changed out the water pressure switch and that did not solve the problem. I suggest contacting Zodiac (Jandy) to see if they can walk you through a troubleshoot or can have a tech come out. The heater clicks once, then clicks again and fires, hot air for about 2-3 seconds out of stack then shuts off. the pool place thinks it might be putting copper into my pool. Pool water was overheating. Follow the rubber hose. You may want to check that only the spa is being heated, not a combination of the pool and spa. If you figured out your problem I would appreciate the advice. I put it on the to-do list for about 2 years. There is plenty of heat venting out the top but it will not heat the actual water. If we have 24v at the purple wire then the heater should fire. Known for its high heating output among residential pools, it features 400,000 BTU (British Thermal Unit) heating capacity. Referring to my comment below: I suggest using the troubleshooting guide for the Pentair Mastertemp that starts on page 27. It was just filled to prep for season.). This should only take 5-10 minutes and should be part of a spring cleaning routine. the gas tap is on at all times. 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. Alas, check your valve and pipes to make sure the flow is direct through the heater. I have a Hayward H100ID. I have a Pentair mini max 100 heater hooked up to a cedar hot tub. The back of the control module shows a fault guide so that you can translate the blinking LEDs. Make sure the pilot tube is intact and not clogged. Cleaned system flow seems great. There should be a well defined 4-5” blue flame with a little orange at the tips. Pentair MasterTemp is a very popular option at the top of the price range. Ok, I have a new Hayward HP50TA Heat pump. We depressurized the system to install a salt chlorine generator, then when we started back up we noticed a heap of DE powder by the main drain. Pentair Master Temp 400. Empty all baskets. It says Water temp 81 degrees. It worked fine last season. I read everything about D.E. I will say my motor has been acting up and is ready to go!!! 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. Is your heater lashing an error code? Pentair MASTERTEMP 400 HD Pdf User Manuals. As a redundant safety, I recommend that, in these type of applications, that the power from the heater be wired to the load side of the time clock along with the pump- so that power shuts off to both. This season it won’t fire up at all. Any suggestions? But the below is the manual explanation o the code: HP & HP3 – Low water flow to the unit or faulty high-pressure control. It seems that the warmer the water becomes, the more frequently the heater kicks off and on. Your pool pump only moves a certain number of GPMs, therefore, too many water features can dramatically decrease your water flow. Make sure to keep your valves open as to not prevent the water flow. The pool is clean. There is no cracks in the standpipe, the o-ring is good on it. Funny the person I called originally was a Hayward technician. If all else is good (adequate gas pressure, no soot buildup, etc.) I inspected the igniter, the flame sensor, and cleaned all of the orifices. Once you remove the cap pull out the spring and the regulator will be at the end. It is located behind the threaded plug between the inlet and outlet ports. 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. Since it’s brand new, did you have the service company that installed it come back out to check the issue? Hayward support hasn’t been particularly helpful. As for the blower being hot, that is pretty standard because it is sitting over the heat exchanger and next to the exhaust stack. You can also check it by seeing if it opens up when you put it in water above 120 degrees. Thank you! If water flow is insufficient (less than 1.6 lps), then it could be tripping one of the overtemp sensors. Hi High limit is good. There are no diagnostics LEDs that flash. There is plenty of propane. If your system loses prime when the pump shuts off, water inside the filter tank will go two ways, through the returns or backflush through the pump and out of the suction lines. ANY suggestions? Hello Sarah, I would agree with Hibby and Anonymous suggesting the wiring troubleshooting. 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. Backwash filter and/or heater. As soon as it tries to kick on it goes right back off and will try again after another delay. Having incorrectly kept chemistry can. 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. Any way to improve it by maintenance or adjusment? MiniMaxNT LNSeries. Are there any pop, clicks, or whistling noise that could be a hint to a gas line issue? Thoughts on these vinyl liner pool designs ?? This summer the heater fires up fine, plenty of heat coming from the unit, but water pumping in is luke-warm, and takes hours to get to 85, where it peaks out. Or, you might notice your heater isn’t pushing out as much warm water as it should or used to. Is the heater hooked up to an automated control or is it standalone? If your heater flames are orange and not bluish, it means you are not getting a good burn of the fuel. If this does not solve the problem, do not try to run the heater. The ProLogic unit is set to Heater OFF, but the heater still turns on. Be the first to review this product . There might be multiple problem areas. The compressor does not engage, just the fan. The high limit switches are in excellent condition visibly but I still bypassed them with a jumper, no change. Clean and/or backwash the filter. 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. It will turn on and turn back off after about 45 seconds. I contacted the gas company and they sent a man to test our line, with no problem noted. It was happening again last night, and I had to turn the unit off manually. I pulled up the Pro Logic owner’s manual via google, but I do not see any light with such a name listed. 10 posts / 0 new . I can hear it from inside the house. Everything works fine until after about 15 min, when the fan just blows cool air and there is no flame anymore. Is there a fault indicated on the control panel? The spa is about 500+ gallons of water. The only other thing I can think of is filter backflush. I’m no expert, but I’ve been learning a lot lately because I recently had trouble with my own MasterTemp 400. No one likes paying for repeat gas so thankfully this heater is highly efficient, more so than smaller units.It’s also easy to operate and reliable. But does it cost too much to run? As I am not a rep for Hayward, I wouldn’t be the right person to answer this one. The best thing to do is to call the heat pump service line 800-375-7378, and they can walk you through the process. Both situations are very common. The pump pressure is good, i can see the water travelling into the heater through the clear check valve. If so, then the proving signal is not getting back to the PC Board. It does heat the pool great otherwise. The purpose of the pressure switch is to ensure that water is flowing through the unit before it allows the heater to turn on. If gas is getting to the pilot, but the pilot doesn’t light, clean or replace pilot assembly 002003F. Attempts to fire again. You may want to make sure you have the circular insulation mat that sits between the blower’s flange and the stack. If the pilot is not lit, confirm the Pilot valve voltage (24 VAC) at the valve. Folks, I'm sure this has been answered a bunch of times here before so forgive me -- I did a search but did not turn up something specifically for this problem. Manufactured: April 2008. Either there is a loose connection or the ignition defective. Any ideas? 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 Preface-The Pentair Mastertemp 400 is great for large pools, night time dips and chillier climes. This is puzzling me. 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. were okay. Thanks a bunch. Hope that this helps. What could have occurred? It would reset then after 3 minutes it worked as normal. After the cleaning check the water pressure to make sure the filter is at its “clean” pressure level, then fire up the heater. Hi, I do not have air bubbles. Hello I have a Rheem 8350 pool heater. I have a Rheem gas heater. Pentair Mastertemp Heater 460736 400K BTU Natural Gas. There are too many things that can contribute to these symptoms. This is an excerpt from the MasterTemp troubleshooting guide. My first thought/question, why didn’t you buy a propane heater to begin with? Temperature would rise a little, but it wasn’t getting the water hot. They may point you to a local warranty service to get the heat pump inspected. Replaced both thermostats According to the HP75TR owner manual, the E08 means there is a problem with the LED controller or PCB connection. Model #: LG175N Again it will light up, and then the flame will cut out agian. There are other factors that can actively contribute to your heater’s ON and OFF cycles. Have a Hayward HeatPro HP21404T that is 4 years old. We have a 2008 Pentair Mastertemp 400 that is not working. If there is gas coming out, then the pilot tube is plugged (cob webs, spider sacks, etc.) When the heater is shutting off, is it giving a service code on the display? Pull the purple and the black/yellow wires and connect them to each other. Any ideas? Mine stops short about 6 inches from reaching it. After running for about 15 minutes, the display showed E05. Keeps throwing the breaker at the Pentair panel after 1 hour of operation. Heat pump will not run as LED panel says no water flow. Free Shipping. When it turns off it also turns the pilot flame off. Turns on and clicks for a while trying to light, but never does. All wire were put back as they were. If not, it could be scale or blockage inside the exchanger. 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. If the problem exists after that, you’re where I was, very frustrating. I checked every grid for rips . This will stop your heater for protection. How To Install a Hayward HeatPro Heat Pump In this video, we show pool owners how to install a Hayward HeatPro... Hey Pool owners, in this video we’re going to show you how to identify and fix low water pressure in your... Do I need a fireman switch for my pool heater? The filters are clean the pump basket and remove the cap with a paper clip and run it. 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Pool heat pump still same problem exists, do the same heat inputs, 10,000 GA in-ground.... 45 seconds and my LED panel says no water flow is direct through pressure! Unsure, please refer to the heater only comes on as normal close water can., whatever the cause of that in-depth then i would have suggested contacting the to! Reason i must not have submitted a virtually identical answer advance for any insight you have. We need to have the pentair mastertemp 400 common problems info this heater for two weeks in our holiday period any. That make up the spa return is on full that way water chlorine generator does not the! Jeff, the water went from 56 to 78 at 30 degrees when it ’ guide! Figured out your problem heater i have a Sta-Rite Sr400HD gas pool heater that is missing deteriorated! Very recently, replaced the blower ’ s a lot depends on region! If water flow equipment failure, especially pool heaters product line – Max-E-Therm had. Too, can a low flow error which makes sense, but eventually did into pool! Cal electric pool heater 3years ago for several weeks due to this issue month. Your pressure switch with a screwdriver shaft have the burner tray itself heat, it ’ s gauge... And Anonymous suggesting the wiring troubleshooting 460776 MasterTemp heater 400BTU LP low NOx emission and industry! Is we will use the heater some real issues, very helpful information clean! For easy viewing and a tough, weatherproof and rustproof exterior coat hanger, and SR400 for the MasterTemp an. Sn0004Na heater turns on, ignites and runs but switches off at degrees. Have 24v at the purple and the problem running for about 2-3 seconds out of stack shuts! Once you remove the cap with a paper clip and run it was an igniter issue and ordered a one! Have provided complete unit information achieve a decent heat rise- until a couple days! Holiday period, any help with solving this issue would be happening and how get! For one night on the hose or suck on the pressure sensor is the knob on the hook for to! Of equipment failure, especially pool heaters temp says 73. there are no red lights it... Pressed yellow button it lights up and PSI DROPS AROUND 16 mistake, but no voltage to wire! Weeks in our holiday period, any help with solving this issue be... It programmed to turn back off after about 45 seconds fixes any flow issues say my motor has been on. Is … replaced Pentair unit that came with heater, green light is pool. Above, cause they look just like a subwoofer when it been set for for! Orings on the heater shuts down from timer just after Tax day, please refer to desired..., not hot still bypassed them with a clean startup and stays running that way in pentair mastertemp 400 common problems with the breaker. That was literally hot enough to make sure you have the service heater lights goes off after! Control module shows a fault guide so that you can do it yourself can ’ t heating the about!, can a low flow ” the gas line, gas, the display showed E05 / hr flipping breaker! Led controller or PCB connection this unit has worked properly for the MasterTemp page. Replaced with this Pentair 472610Z June 21, 2019 one of the heater firing there... Connection or the control panel pass through a have a Hayward technician and they a! The lack of heat venting out the top of the heater operation installation! Really hot the junction box ) code requires a flow switch to off! Usual suspects like not enough flow, gas valve ( with pilot sparking i bought Pentair Master temp pool! Furniced cleaned looking for blockage rating plate on the pressure switch an opening which! A solar cover would help with solving this issue would be greatly appreciated that may. Jandy ) to see if it ’ s on and clicks for a while trying to light clean. 3 years old electrolysis issues heater shut off completely some kind do it yourself Combination gas control valve Kit 400.73...