Besides, the heater turning on automatically, the flame wont stay lit, the blower not working, low water flows, error codes, a defective control panel, dirty filter, noise, freeze damage, and heat exchanger problems can trouble you while using Pentair MasterTemp. 7. Solution: Replace the thermal governor with a new one. Of course, there is also an internal bypass in most gas pool heaters. The burners on this type of MasterTemp/Max-E-Therm heater are unique from previous generation pool heaters. 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. 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. Kindly help. If the automatic gas shutoff switch has tripped, you need to reset it. It could also be just general humidity, and a very moist/humid area, not so good for circuitry. If you are sure that the heater is getting power from the outlet, examine the fuse inside your heater. Sometimes the heat exchangers leak. When I hold it, the temp slowly went up to 90. Hopefully, now you have a crystal clear idea of each of the Pentair Mastertemp 400 problems. "logo": { Let us know if you need help finding it. "@type": "Organization", Repair or replace the pilot lit. Replace the bad switches. "headline": "Pentair Pool Heater Troubleshooting Guide", By unlocking the manual relief valve on top of the Clean & Clear Plus filter, I would bleed air out of it. To fix your pool heater issue, make sure the water flow is sufficient & valve is open as the filter is clean. Check the pH of the water and make sure it is balanced. Check out the internal and external bypass systems. I sent the following on May 23, but received no reply/advice. Ascertain that the blower is securely fastened in its location. "publisher": { To allow water to pass through the heating system, make sure the valves are open. Hopefully, you will . Apart from the built in temperature controller, a built in water pressure switch combined with a stack flue sensor monitors the pump to prevent it overheating. I have a Pentair 400 mastertemp propane spa heater. Dont stress! Pentair MasterTemp pool heater parts are arranged into 3 parts buckets Burner System parts,Electrical System parts, andWater System parts. Thank you Frank Once clean, put the filter back together. 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. Go through the below guide to get the best solutions for Pentair Mastertemp 400 problems. You may require cleaning your filter this way twice a year instead, depending on consumption (particularly if your pool is open all year). Along with the fluctuation the heater cycles. filter. Already known as being dependable and efficient, MasterTemp now offers smart features and an optional energy-saving Smart Bypass Valve Kit to help you ensure your pool is ready whenever you are. Lets start. When it used to work I would hear a big kaboom sound and now nothing. "url": "https://blog.intheswim.com/" If still, the problem is persisting, reset the heater by turning the breaker ON and Off positions. You can install a bypass valve to regulate the required flow rate. Step 2: You then need to take apart the Max-E-Therm heater from the system. Make sure temperature setting is above water temperature. An ignition failure can be the result of a failed flame sensor, bad igniter, malfunctioning ignition control module, faulty control board, tripped or broken automatic gas shutoff switch. Pentair Pool Filters, Pool Pumps, Pool Heaters, Pool Lighting & Pool Automation. The correct temperature of water depends on the user. 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. If the problem persists, remove the temperature regulation completely and see whether the heater runs. We have a Pentair minimax 100 Dsi. Thank you. This problem can be resolved by servicing the pump or filter. Do any diagnostic LED’s on back of board (AGS, AFS, SFS, HLS, PS . If your Pentair Mastertemp 400 turns on and off, inadequate water flowing due to a clogged water filter is the leading reason behind this. If the heater stays running with the pressure switch bypassed, then see what can be done to improve flow rate. I connected my old termistor and got a reading of 85 degrees. Section 5. Then it came back on without my doing, switched to spa mode and commanded 110F setpoint. Operating Control Panel. Curt could be a short in the thermostat wire, or the thermostat could be going back, check the wire connections for rust/corrosion. On the thermostat, set the correct temperature. It usually drips inside of the heater, making people think that their heat exchanger is leaking, when its not. In case your heating system is clean and free from loose debris, it is most likely the manifold bypass. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. If the issue is related to a high limit switch, examine the fact by ba bypassing the switch. The following are some of these issues and their solutions: These are the possible solutions for this issue. The pool heater is about 4.5 years old. The Mastertemp 400 requires a voltage of 24 VAC. Pentair Mastertemp 400 Blower Not Working, 10. You may be able to troubleshoot the thermostat, or bypass it with a jumper wire, to determine it has failed. I called Pentair tech support and they helped with some troubleshooting. When this fuse blows, the symptom is a heater that won't power up on the touch pad. "datePublished": "1/8/2019", It mainly happens if the discharging of the flow of air has been blocked or restricted. Did you replace both Hi Limit Switches? After persisting in this issue, you will hear a sound like a bumping sound from the heater. It 'rattles' 3 times, doesn't fire up, then the SERVICE HEATER light comes on. To resolve this error number, ensure the fan is not obstructing airflow. Test your fill water too. Lower gas supply, blocked filter, defective gas valves, gas supply valves, or plumber valves are highly responsible for this. Enquire about how much voltage is being supplied to the heat pump. "@type": "Person", I think our heat exchanger corroded last summer. Your email address will not be published. Check through it. If not, replace it. There are innumerable possible errors that can happen in this situation. Education Center. I love gardening a lot! "primaryImageOfPage": { Clean out the filter first to resolve the low water flow issue. Replace it. Pentair water heaters have garnered a dependable reputation for being efficient. Turn off the Pentair heater; . A heat exchanger is an essential element of the heater, whichtransfers heat from one medium to another. 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? Make sure that the air coil is being sprinkled upon during cooling. Very low pHand alkalinity levels over several years can strip the copper from a heat exchanger and wear the tube walls paper thin. They usually cannot be fixed. If there is any way to shield the front of the heater from rain, without enclosing or covering fully, that may be helpful. By using a voltmeter, measure the voltage of the high limit switch and pressure switch. }, If still there are strange sounds or shaking, contact the manufacturer of the heater because it could be risky for you now. Cant figure out why it keeps reverting back to a higher temp on its own when weve turned it down. Using cupro-nickel allows you to provide machine protection against saltwater erosion. Note: when the opened the manifold last winter to replace the bypass, the manifold and the heat coils have no signs of scales. In case there is blockage in the heat exchanger, how do I fix that? It does heat the spa about 1 degree every cycle. Check your igniter module. Step 1: Take off the left side panel of the heater. If the temperature outside is chilly and the defrosting feature is not enabled, then enable the feature. 35. Hi Emma, your heater has two thermostats, for convenience, to keep one set to spa temp and one set to pool temp, so you dont have to go back and forth, and try to remember the exact setting each time. Ryan, start with water flow, make sure that the filter and baskets are clean and the filter pressure is normal, and water is not bypassing the heater, externally, or internally from the internal bypass, located in the front header. Thoughts? Worked for 1 weekend, now won't fire up. Examine the connection between the burner and the gas and other lines to see if it is secure. 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. Would you know why the igniter on my Pentair pool heater keeps burning out? Replace the defective thermistor. }, Here are the video links. Can you give some thought? The heater manifold, and also the water flow sensor, and the Thermistor connections may be getting wet. The breaker is tripped as a result of this. What's better thanTop 5 pool pump problems? To troubleshoot each of the above issues, the user needs a quick working solution guide. In case the issue persists, replace the control board. If replacing the keypad membrane hasnt stopped your heater from turning on automatically, you need to call customer service for a new control board. If not, replace it. I have a Pentair 400 master temp. If it doesnt work, contact the Pentair customer support center. The heater itself will adjust up to 104 on either of the pool or spa settings. You will need a screwdriver for this. You must log in or register to reply here. Change your transformer if the supply is lower than the range mentioned. I think I am commanding only a 1 deg increase in temp, so although I can not see anything but Ad0 I will wait and see if the burner cycles down as the water temp warms the 1 deg or so. Check out the power supply to the pressure switch, fusible link, and high limit switches as well. This problem needs to be fixed ASAP. Thank you! Top 3 pool pump problems, of course! You can try replacing the control board yourself in case you have some electrical knowledge. So I heed the advise although the flapper in the check valve still doesnt open completely, the heater started working again. The PS is red, and led6 is red. Installing a pool heater is not simple, but is done DIY all the time. Carlos, those symptoms are HLS when it cools down, it turns back on. Call Us Nationwide: 1-800-741-9956. . There are four of them. Any ideas on what the problem could be? Now, check out the voltage supply to the control board. A second major problem with heat exchangers is scaling water conditions and poor combustion. 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. 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. }, HI! In some cases, the thermal governor that controls the cooling fans gets defects due to years of usage. The same is true for the StaRite Maxetherm heaters. Otherwise, your control board is most likely to be blamed. However, about 3 to 4 months ago it started turning itself on and heating the pool. The plumbing that enters and exits the heater is normally connected by two couplers that can be quickly switched on and off. The mastertemp display doesn't light up when controlled remotely. Problems and Corrective Action. Frequently Asked Questions. Have a BRAND new Pentair Mastertemp 400. The heater is only 3 yr old, just seems the erratic behavior is electrical/electronic in nature. Saltwater pools can also develop corrosion around fin welds, which could lead to leaking. Keep in mind, you have two sensors. If you have a Pentair MiniMax NT and are experiencing technical issues, this blog is for you. Theburner system of the MasterTemp/Max-e-Therm heaters is called the flame holder. Solution: Following the same logic as the last step, walk over to your gas supply and check that's its gas line valve is also set to the "OPEN" position. So you may be better off buying a new heater entirely instead of replacing the heat exchanger. Verify pressure tap between gas valve and blower inlet. "dateModified": "1/8/2019", Please help. Replace it if you find no voltage there. . When the condenser coil on your heat pump gets unclean, it needs to work more to provide equal amounts of heating as normal. Thank you for your time and response. Save my name, email, and website in this browser for the next time I comment. I had to turn off . Yes, there are some Pentair Mastertemp 400 common problems but its still a good one and highly recommended. We have a Pentair 300 for both spa and pool heating. Even if they are fixed somehow, they will stop working after a while. Look for a short between the Thermistor and the control boards wiring. Replace the blown fuse with a new one and turn on the pool heater to check whether the display is working properly or not. Ignition failure is one of the common problems that the users of Pentair Mastertemp face. It is a sfs code, but with no e05 error code. It fires up fine again then the same thing happens. If the pool is bigger corresponding to the size of the pool heater, itll take time to heat up the heater. When your heater isnt automated but you find that it is turning itself on, you probably have a bad keypad membrane or control board. Sometimes, blockage in the pumps strainer basket creates water flow restrictions. Troubleshooting the stacked exchanger type of heater is not much different than other electronic or digital pool heaters. . "address": "", Since the voltages involved here are of a very high range, they have a greater potential for accidents. Alternatively, the temperature display can sometimes be quite inaccurate. The most crucial thing to remember is that the sensor is in good working order. It will create all sorts of trouble from ignition failure to displaying the wrong temperature. Gas and air are mixed and ignited in the cylinder, which warms the tubes wrapped around the central burner chamber. This low inventory might be down to a harmed transformer or a low stockpile of voltage to the hotness siphon. The blower needs to be repaired or replaced in this situation. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. We are going to look over the common Pentair MasterTemp 400 error codes in this section. Acquire a 10k ohm resistor. It kept doing this several times and then sometimes the temp will start counting up rapidly and slowly counts down to the current temp and cycles again. No mater how many times I press the Heater Off button, the heater does not go off and the display panel does not go blank. When your heater wont turn on, you probably have a blocked filter, tripped safety switches, or a defective control board. You need to see the actual temp on the heater. You need to take apart the filter cover and get the elements out. Inspect the blower and clean out the stuck debris of the element. Possible Cause: Gas supply valve. Might charge under $500 to install. I have tried running it with the pump going full boogie to see if it is water flow problem and the service heater light still comes on. It should be damaged and crack-free for fluent water flowing. "url": "https://x1.adis.ws/v1/media/graphics/i/lesl/its-logo-wide", Dont ignore the strainer basket near the pump. The solution to your heater issue is given in your previous comment. When the gas flow shuts off due to the faulty pressure switch or low flow rate, then your heater will face this issue. The controls and circuit boards for the Max-E-Therm and the MasterTemp are fairly identical. Thanks for the help. We can expect that whatever the issue will persist, you will easily fix it by following our guide. The exhaust pipe is leaking water. You will need to reset your heater to get it out of the lockout. I installed a Ta60d sand filter three weeks ago and it worked fine with it until two days ago. Learn more about pool care and repair. However the Heater Off button doesnt turn off the LCD display like it does in this video @2:05 Heater doesnt have its own control box, but is hooked up to an inline timer with the Pump. So you could save $1000 by buying online and having a company install. Manuals; Brands; Pentair Manuals; Swimming Pool Heater; MasterTemp 400; . 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. The water flow to the heater is often disrupted by the by-pass valve of the pool heater. We are always ready for your assistance. The Thermal Governor has become jammed and is unable to open. Heat exchangers, when they fail and leak, they develop pinholes in the copper tube, or may also leak at the point where the tubes are welded to the end plate. Now, we make a living selling to DIY people, who like to save money. . So in this case, you need to prevent the damage. Step 3: Two mounting screws hold the ICM in place. Low water flow is the cause of up to 70% of all My heater wont heat service calls. What is the function of the High Limit Switch on Pentair? Ensure that the pool filter is clean and clog-free. "mainEntityOfPage": "https://blog.intheswim.com/pentair-pool-heater-troubleshooting-guide/", We are a registered 501(c)3 non-profit that is funded by user donations. Ensure that the control board is dry. 4. A tough, rustproof composite exterior handles the heat and weathers the elements. They will help you out with replacing your control board. Replace the fuse if blown. The heater does not ignite. Enquire about how much voltage is being supplied to the heat pump. Here we have elaborated on all the troubling points as well as the fixing steps. Pentair Mastertemp 400 Common Problems [11 Easy Solutions], 1. Water Flow Problem. Clean up all the flue sensor orifices to ensure there is no grime on them. They have a have an SF code for Sensor Failure. Do this test with the water still running. 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