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Hello , This is an inactive thread. The pool heater is about 4.5 years old. This problem occurs due to some water chemistry and its residues gunk up in the pipes. Sounds like a ghost in the machine! 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. It sits in a pool shed, with decent, not great ventilation. Work through the steps listed above and youll be cannonballing into your warm pool in no time. A circuit board controlled blower exhausts the heater, to maintain correct combustion and exhaust. SOURCE: Pentair MasterTemp 400 Heater Will run fine for. "height": "219",
Unfortunately, the only way to solve this issue is to get a new heat exchanger. In case the wiring is good, you probably have a thermistor that needs replacing. 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. The other major reasons include faulty thermal regulators, failure of the high limit switch, and damaged ignition control board. 34. After about 15 seconds I hear a clicking noise then the heater light stays on for about 5 seconds, then starts blinking again. How does the thermistor work on the pool heater? "primaryImageOfPage": {
By using a voltmeter, measure the voltage of the high limit switch and pressure switch. Operating Control Panel. Reason 4: Thermal Governor has got stuck and is not opening. In your opinion, is my board again wet, or is my board damaged (perhaps by moisture) and needs replaced? Heater will not start. Cupro Nickelheat exchangers can be used for much greater resistance to the effects of salt water corrosion. I replaced the HLS twice to no avail. Remove the old thermal governor and replace it with a new one. And if the heayer shuts off, the gas valve is ok. Then check the control board & fix it. Check for wet or damaged igniter with low resistance to ground. The consent submitted will only be used for data processing originating from this website. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Replace the bad ones. One of the biggest fears any owner of a Mastertemp has is the corrosion of the heat exchanger. And again, I always thought that when something big happened, I would have to get it replaced. Required fields are marked *. View online or download Pentair MasterTemp 400 Brochure. Because gas pool heaters do not contain the massive amounts of gas required to trigger an explosion inside or around them. This low inventory might be down to a harmed transformer or a low stockpile of voltage to the hotness siphon. Do any diagnostic LED’s on back of board (AGS, AFS, SFS, HLS, PS . 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. I was able to power heater off, then pool-on, and I could see 78 deg water temp registered, and with 80 deg setpoint, burner kicked on ok. 10 minutes later I went out to check, and Ad0 was on the screen, and I can not poweroff (heater-off button not responding), but behind the scenes I think it is responding to temp-up or temp-down command, to call for heat and burner, but the screen remains at Ad0. Contact customer service and tell them about the issue. "caption": "In The Swim Blog"
If the machine that circulates is not turned on, Damage to the switch which controls the water pressure. I shouldve tried harder to learn how the pool works. Replace the fuse if blown. Boiling in the heat exchanger can occur for a number of reasons. I tried to turn it off at the control panel by pushing the heater off button but it would just . So far I have replaced the thermal regulator, igniter, thermistor and the bypass valve in the manifold. Top 3 pool pump problems, of course! Replace if you find any chemical or sanitizer damage there. Your email address will not be published. To fix your pool heater issue, check the gas valve removing the wire that runs between the thermostat & the gas valve. Continue with Recommended Cookies. You may need to replace it if you get it corroded. The solution to your heater issue is given in your previous comment. It worked well as usual, heated water to 85F as commanded. Glitches in the power supply are the root reason behind this. 38. When we turn the temperature down before the pool system shuts off for the night the next morning when the systems turns on the temperature is back up to the previous higher setting on its own. },
To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps shutting off, display not working and the heater not turning on. The breaker is tripped as a result of this. If your heater is shaking, be sure that there is a problem with the heat exchanger. In case your heating system is clean and free from loose debris, it is most likely the manifold bypass. I stopped the company servicing my pool last year when they kept charging me for servicing the heater for the exact same issue. There will be a reduced water flow if you see that the switch that detects pressure is open. Ensure that the pool filter is clean and clog-free. The pipes going in and out of the heater need to be unplugged for good measure. First, power cycle the heater to erase all the unwanted factors. Wash them out very carefully with a hose. mike61953. Replaced the thermistor probe, not the problem, not getting an error code, if I keep running, the heater ignites again and again turns off? Is this normal? Home / Pool Repairs / Equipment Repairs / Pentair Pool Heater Troubleshooting Guide. Among the most common problems associated with all pool heaters and not the Mastertemp 400 alone is inaccurate temperature control. Look for a short between the Thermistor and the control boards wiring. The most crucial thing to remember is that the sensor is in good working order. I have a Pentair 400 mastertemp propane spa heater. The Mastertemp 400 requires a voltage of 24 VAC. Normally you can smell a little gas when it kicks on but it does nothing. For a better experience, please enable JavaScript in your browser before proceeding. Might charge under $500 to install. If its unclean, give it a good cleaning with a hose and check for fractures in the basket lid. Read More. If it fires off everything works fine a few minutes then shuts off.Ideas?Filter is clean. I think our heat exchanger corroded last summer. Replace it if you want, or just continue to use the spa thermostat, for pool heating. The main function of the HLS on any pool heater is regulating the water temperature of the unit. As it plays a big role in continuing the heater function, thus there has a high risk of corroding this part. The thermister, sensors, and Board are working. Section 5. The heater is a 400k model 460736 installed about 2006. Again, if it is displaying a lower temperature, the heater may keep heating even if the water is hot enough. They have a have an SF code for Sensor Failure. Ensure that the power outlet your Pentair heater is connected to is good and provides the appropriate amperage for the heater. This should not be a cause for concern, though. 6. It does heat the spa about 1 degree every cycle. Your Pentair MasterTemp 400 display not working generally means that your unit is not getting power, you have a blown glass fuse, or a defective control board. When the condenser coil on your heat pump gets unclean, it needs to work more to provide equal amounts of heating as normal. If the issue is related to a high limit switch, examine the fact by ba bypassing the switch. Enquire about how much voltage is being supplied to the heat pump. 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. Before turning on, the heater contains a pressure switch and an internal bypass to ensure the right amount of incoming water flow. If the fact is related to the safety switch, jumpstart your heater and replace the bad switches. Any ideas on what the problem could be? Pinhole leaks develop on the copper tubes that are on the interior of the machine. I replaced the thermistor and still have the same problem. You may need to replace it. Be sure all connections are clean and tight. This could lead to leakage. TROUBLESHOOTING OF AFS ERROR LIGHT LEADS ME TO FIND A COMPLETELY DIFFERENT AND MUCH MORE COMPLICATED AND EXPENSIVE ISSUE.DON'T ASSUME YOU HAVE A DEFECTIVE AF. Hopefully, you will . The next day I powered pool-on and it registered the correct water temp. Pentair Mastertemp 400 common problems include displaying the wrong temperature, low water circulation, leaking water, water scaling, and corroded heat exchanger. This error code should not be shown on your Pentair heater at this point. Dont ignore the strainer basket near the pump. "width": "611",
Make sure to maintain the device properly. This can be caused by incorrect wiring of the thermistor or a faulty thermistor. It may not display this or other websites correctly. Solution. Although, theres strong water coming out of the 2 return lines. Education Center. The most commonplace for scaling to water is in water heaters, usually found in homes. If it is not working, contact customer service to send you a new control board. Paul, that sounds like an external heater bypass arrangement, used when very large pool pumps are used, to allow some of the water to bypass the heater. When the folks came to open my pool last week, they said it was leaking and that the owner was coming out to look at it. Hi Peter, when he says the heat exchanger is shot, he must mean that the copper tubes are leaking water, caused by erosion and corrosion from high water pressure or low pH and alkalinity, over many years. . When it used to work I would hear a big kaboom sound and now nothing. Open the control panel of the Pentair pool heater and examine the controller fuse. You must log in or register to reply here. Clean the skimmer or the strainer basket of the pump. I have a Pentair Mastertemp 250 pool heater. The error codes will help you understand what your Pentair heater is trying to tell you. It is also advised to change the entire system if required. Check that the heater is getting sufficient gas supply and pressure to run. Hello, I have a Pentair Mastertemp 400 that starts heating the spa but then shuts off and on every few minutes. Save my name, email, and website in this browser for the next time I comment. The Mastertemp 400 requires a voltage of 24 VAC. This problem can be resolved by servicing the pump or filter. Call Us. ******************************************************** Replace the defective heat exchanger if needed. But, is there a way that I can validate that there is really an issue? This is the best possible solution to this problem. Once set up, select the . Check out the fuel level as well. "image": {
Clean the clogged water filter to ensure a fluent water flow. The temp display fluctuates wildly from 70 to 90 degrees and anywhere in between. You will need a screwdriver for this. Also check that the blower comes on. Water Flow Problem. Carlos, those symptoms are HLS when it cools down, it turns back on. Check out the other heating elements. The valve has to allow enough water into the heater, not too little, not too much. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. "author": {
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Troubleshooting your Pentair pool heater doesnt have to be a time-consuming hassle! James from TFP noticed something wrong with the 3-way valve into the my heater. Enquire concerning how much voltage is being provided to the hotness siphon. Ive replaced it twice in the past two years and it may need replacing again because I smell gas but the heat never turns on. Mastertemp 250 Won't Turn On. Replace the blown fuse with a new one and turn on the pool heater to check whether the display is working properly or not. Let us know if you need help finding it. Also, check out the bypass valve and replace if it is stuck open. We have a Pentair 300 for both spa and pool heating. All Right Reserved by HeaterFixLab. Use the following troubleshooting guide to repair common heat pump issues and get technical support. Step 2: Disconnect the system from the Max-E-Therm heater. Product HIN / Code Requirements / Safety Warning. There might also be damages to the suction air leaks. It has a big role in controlling the heater operation. The wiring diagram is given below for your reference. Rust or red spiders can clog these up. But now, if you have any questions, leave a comment below. If it has a substantially lower calcium level and your pool is over 250 ppm hardness, you will need to draw off water from the pool and refill. I had to turn off . Look at the blower if you hear a clicking sound. You can try replacing the control board yourself in case you have some electrical knowledge. Save my name, email, and website in this browser for the next time I comment. The burner is located in the center of the combustion chamber, wrapped by the circular copper heat exchanger tubes. so does the heater actually turn off when you use the automation to turn it off? The output of the transformer should be between 24 to 28 volts. Adding MA is a normal and expected process to help keep it in check. Pentair Mastertemp 250 turns on automatically. If no ignition, I turn off, wait, then re ask for heater. Acquire a 10k ohm resistor. Sometimes, blockage in the pumps strainer basket creates water flow restrictions. Besides, the heater turning on automatically, the flame won't stay lit, the blower not working . The PS is red, and led6 is red. Clean the water filter and pump basket to eliminate the water flow. Solution: The solution to this problem is actually very simple and easy. Plus, itll be helpful for you to read our complete solution guide on Pentair MasterTemp 400 keeps shutting off. We are going to look over the common Pentair MasterTemp 400 error codes in this section. Have a BRAND new Pentair Mastertemp 400. Make sure that the filter of the heater is cleaned as well. You are using an out of date browser. Hi Davy I live in Maine, so very short pool season. }
. The thermal regulator should be in fine working condition. The air space above the burner heats up, which heats the copper finned tubes laying on the top of the combustion box. Can you give some thought? Description: This recall involves Pentair Water Pool and Spa StaRite and Mastertemp pool heaters sold in various styles and models with manufacturing dates between December 22, 2020 and January 6, 2021. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/",
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Sanitizer damage there system if required glitches in the pumps strainer basket of the combustion chamber, wrapped by circular... Heater issue, check out the bypass valve in the heat exchanger not too much filter. Email, and damaged ignition control board ensure that the sensor is in water heaters, usually found in.! Fires off everything works fine a few minutes then shuts off and on every minutes... Pentair 400 Mastertemp propane spa heater pinhole leaks develop on the pool heater Troubleshooting guide hot enough / pool... Is also advised to change the entire system if required only be used for much greater resistance to.! Is working properly or not but then shuts off.Ideas? filter is clean and free from loose,... 5 seconds, then starts blinking again to remember is that the filter clean! A few minutes some electrical knowledge fires off everything works fine a few minutes not be a cause concern...