2024 Pentair mastertemp display not working

1. Pentair Mastertemp 250 Not Igniting 2. Pentair Mastertemp 250 Not Heating 3. Mastertemp 250 Won't Turn On 4. Mastertemp 250 Keeps Shutting Off 5. Pentair Mastertemp 250 Air Flow Fault 6. Pentair Mastertemp 250 Cycles On And Off 7. Pentair Mastertemp 250 Heating Light Blinking 8. Pentair Mastertemp 250 Turns On By Itself 9.. Rachel zoe ghost throw blanket

Used this to replace a 10 yr old Pentair Mastertemp 400 control board that was failing. Solved the issue, easy to install. Information was not clear that it also included the keypad. Could have used more instructions for older systems especially when the Pentair control center is turning the heater on/off. Today I went to turn on my Pentair mastertemp 250 heating unit but the display wasn’t visible and the control board was not responding to any input from the ...Jul 27, 2022 · 40,450. Jul 27, 2022. #4. The "E01" code is an indication of an open or bad water temperature sensor that is also called the thermistor on the parts diagram. 126 usually means a shorted water temperature sensor (Less than 3,312 ohms). If you have replaced the thermistor, then the board is probably bad. Last edited: Jul 31, 2022. 1poolman1. Forums. Equipment - Build, Use, and Repair. I have a Pentair Master Temp 400. All the buttons work except for the temp up button. I have pushed the rest button but that does not change anything. I can adjust the temp down but cannot get the pool above 77. Any help I can get is appreciated.Heat pump troubleshooting guide for Pentair pool heaters. Use the following troubleshooting guide to repair common heat pump issues and get technical support. Call Us Nationwide: 1-800-741-9956. ... does not work, recover the charge, remove bulb from SL, unscrew TXV head, shake it, if rattles, replace head (PN KT-45-ZGA), ...If the heater is on and blowing heat out of the exhaust then the heat needs to be going someplace. If the heat is not going into the water the heater will overheat and trip the SFS or HLS overheat safeties. LED11 is the Service Heater light. Heat not getting into the water could be caused by a bad thermal regulator, bypass valve, or scaled heat ...Today I went to turn on my Pentair mastertemp 250 heating unit but the display wasn’t visible and the control board was not responding to any input from the ...Hi, I have a Pentair MasterTemp 300 that suddenly stopped working. It worked fine about a month ago, but now it has no indication of life. I checked the fuse, and it appears to be fine and i tested with a multimeter continuity test. Unsure of …Salt Water Generator. SWG Type. Pentair Intellichlor IC-40. Apr 2, 2021. #2. I read on a different thread that the PentAir master temp 400 is between 40gpm and 120gpm. Regardless if your doing 40gpm or 120gpm the heater will still be putting out 400k btu, therefore it doesn’t matter on the “speed”.Hi, I have a Pentair MasterTemp 300 that suddenly stopped working. It worked fine about a month ago, but now it has no indication of life. I checked the fuse, and it appears to be fine and i tested with a multimeter continuity test. Unsure of …It's an easy fix, just 2 plugs for the board, takes longer to the top off then replace the board. alopgeek • 5 yr. ago. That jives with what I’m seeing. Only when it rains. I’ll see if I can cover it up with a tarp or something. Membrane pad most likely. Replace the cover over it if it's gone/missing as well.Pool control at the touch of a wrinkly finger. Smart phone control, voice control, smart watch control…it’s smart pool control. Wherever, whenever and however you want. Whether you’re installing a pool, or reconstructing one, Pentair has the latest technology to keep you in touch with your pool’s every function and feature. From anywhere.Today I went to turn on my Pentair mastertemp 250 heating unit but the display wasn’t visible and the control board was not responding to any input from the membrane board.Hi Randy,Finally reached max level of frustration with the Mastertemp 250 HD Heater and Installed a new Mastertemp 250 HD Cupro-Nickel ASME version. Purchased from Pool Supply Unlimited however they w …Above the fireman switch is a 1 1/4 amp fuse. Check this fuse for continuity with a volt meter, or a lot of times you can tell the fuse is bad by seeing the internal filament melted apart, maybe even a black mark on the glass of the fuse. When this fuse blows, the symptom is a heater that won’t power up on the touch pad. Edit.Apr 11, 2022 · 5. Low Water Flow. An obstruction in your pool system can prevent your heater from turning on due to limited water flow. Solution: Ensure that your pool filter is clean. Empty the baskets. Make sure the pump is sending enough water through the system. 6. Dirty Heat Exchanger. Your Pentair pool heater demonstrate not working can be a result of a lack of power supply, an blows fuse, or a defective control board. Get their Pentair pool beheizung getting guide to solution this issuance ASAP. Pentair Pool Heater Presentation Not Working [3 Easy Fixes] In this section, we will explore the reasons behind. 6.Check that the breaker supplying power to the heater is not tripped. Turn the breaker off fully then back on. With the power supply breaker off. Remove the side panel just below the heater control panel . There will be a metal box. Loosen the screw on top right side of the box. The door will drop open.Salt Water Generator. SWG Type. Pentair Intellichlor IC-60. Apr 29, 2020. #13. Bad water chemistry that causes a heat exchanger to rot out is going to cause other problems as well. All of the components in the header/manifold (HLS, thermistors, thermal regulator, etc) have been in contact with that same water.Pentair Intellichlor IC-60. Apr 7, 2020. #2. The MasterTemp panel and the IntelliTouch panel operate independently. They do not synch up. They each have their own independent temperature sensors and displays. The temperature on the MasterTemp should be set to max temperature of 104 and the IntelliTouch will control the heater.According to About.com, good students are self-motivated, display leadership, work hard and solve problems effectively. About.com explains that good students ask questions when they do not understand a concept.PENTAIR MASTERTEMP 400 turns on. Goes through the standard boot up procedure (128/R13 appear on the LCD of heater) Then the display shows "1". The heater fires up and starts heating for about 3-4 minutes. Then it errors out with E01... and keeps the code on for a long while. I check the back of the control board in the heater and the …Good Morning Everyone, We opened our pool a couple is past ago with no matters. We walk at turning increase the heat yesterday and of display that shows the...The ScreenLogic2 Interface allows you to control the key functions of a pool or spa using the IntelliTouch® and EasyTouch® control systems. You can remotely manage, monitor and control via mobile device. Easily change, track and monitor history of pH and ORP levels when using the IntelliChem® Water Chemistry Controller with IntelliTouch® or ...So I finally get the nerve to take the panels off and flip over the cover to check the RED service leds. The only one lit is LED 11, which is the same led that lights up the service heater light when viewed from the front. I can't seem to get a straight answer as to what may be causing this. A bit more info, green "spa on" light is on, the ...We have a Mastertemp 400, and when we first looked at the house, it was not working (e05 code I believe). One of the conditions of us buying the house was for the previous owner to get that fixed, and they did. The membrane and control board were replaced 4-5 weeks ago. Our first week or so in the house we used the spa, and it seemed to work ...In this video I will show you what steps I went through to troubleshoot the no heating issue with my Pentair MasterTemp 250 pool heater.#pentair #poolheater ...5. Low Water Flow. An obstruction in your pool system can prevent your heater from turning on due to limited water flow. Solution: Ensure that your pool filter is clean. Empty the baskets. Make sure the pump is sending enough water through the system. 6. Dirty Heat Exchanger.Pentair Intellichlor IC-60. Apr 7, 2020. #2. The MasterTemp panel and the IntelliTouch panel operate independently. They do not synch up. They each have their own independent temperature sensors and displays. The temperature on the MasterTemp should be set to max temperature of 104 and the IntelliTouch will control the heater.Step 1: To get to the thermistor, remove the back panel. Use a screwdriver to take off the three screws on the panel. The location of your Pentair MasterTemp 400 temperature sensor is close to the high-limit switch. Step 2: Remove all of the thermistor’s electrical connections.Anybody would feel annoyed and panicked. But calm down as we have brought you the solutions for common problems that you face in Pentair MasterTemp 400. Problems like Off and On issues with your pool heater, water flow not working efficiently, the position of a heater, Temperature display, etc. These problems can be solved with just minor steps.Caution: Do not overtighten clamp. 3. Route the cable up through the low voltage compartment of the Load Center or Power Center to the Outdoor Control Panel circuit board. 4. Strip wires back 1/4 inch. Connect the sensor wires to WATER screw terminals. See page 4 and 5 for screw terminal location. Ambient Air Temperature (Freeze Protection)I’m not oblivious to someone’s time and energy. Believe it or not I to work. For the record I’ve had multiple issues. What I don’t like about anyone doing service and charging multiple fees to fix the issue and then doesn’t get fixed. Then it’s another $100 to try again. That doesn’t work for me and it shouldn’t for the average ...Apr 5, 2021. #8. JamesW said: Put the system in Service Mode and then press the Filter button to start the pump. Make sure that the light above the Filter button is on. Once the pump is on, press the heater button to see if the heater will come on. The heater does come on when I do it in service mode.#1 Hi Y'all, New to the pool equipment repair world, so I've watched a ton a videos, and am trying my best to repair my Mastertemp200 that won't heat. I've already watched 2 dozen videos, and made some progress, but now I'm stuck about what to replace next.Today I went to turn on my Pentair mastertemp 250 heating unit but the display wasn’t visible and the control board was not responding to any input from the ...Good Morning Everyone, We opened our pool a couple is past ago with no matters. We walk at turning increase the heat yesterday and of display that shows the...1. Pentair Mastertemp 250 Not Igniting 2. Pentair Mastertemp 250 Not Heating 3. Mastertemp 250 Won't Turn On 4. Mastertemp 250 Keeps Shutting Off 5. Pentair Mastertemp 250 Air Flow Fault 6. Pentair Mastertemp 250 Cycles On And Off 7. Pentair Mastertemp 250 Heating Light Blinking 8. Pentair Mastertemp 250 Turns On By Itself 9.You need to remove the top screws on the upper left and right and flip down the control panel. You will then see the low voltage connections. The two wires should connect to J19. The black wire goes up the left hand low voltage channel and into the top low voltage area. It does not connect to any "breaker".Pentair MasterTemp 250 Display Not Working | Trouble Free Pool | Pentair MasterTemp 250 Display Not Working Sound Sunrise Everyone, Were …Pentair has a wide selection of pool control systems to put the power in your hands. Our pool controls include simple but effective systems to monitor pH or water levels, programmable systems to run pool equipment and powerful automation systems that allow you to control your pool while monitoring performance and getting maintenance ...Replaced Pentair unit that came with heater, 3 years old. 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. Replaced with this Pentair 472610Z June 21, 2019.1poolman1. Forums. Equipment - Build, Use, and Repair. I have a Pentair Master Temp 400. All the buttons work except for the temp up button. I have pushed the rest button but that does not change anything. I can adjust the temp down but cannot get the pool above 77. Any help I can get is appreciated.Pentair Pool Quick Link for Parts/Equipment: https://amzn.to/3q6MXmf Mastertemp Pool Heater Parts: https://amzn.to/391FMioThe Legendary Escapes team is build...Ultimate Pool Management Starts Here. IntelliCenter Pool Control System is the most versatile Pentair automation system, delivering better than ever technology you can trust. Easily expandable, this system is now powered by AWS® cloud technology for improved stability, connectivity, scheduling and reliable, centralized control for multiple ...The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. Step 1: Take off the left side panel of the heater. Step 2: Disconnect the system from the Max-E-Therm heater. The wires and connectors connecting the legacy ICM should be disconnected.The High-efficiency, High-tech Heater for Pools Up to 15,000 Gallons. The MasterTemp 125 Heater provides energy-savings and advanced operating features that were only available from much larger heaters. With its revolutionary pre-mixed gas combustion technology, the MasterTemp 125 Heater offers 82% thermal efficiency, the highest in its class. Nov 8, 2021 · Hey guys I have pentair mastertemp 250 that I have been keeping running for 13 years and I can tell you that I have been through three button membrane pads three hot surface ignitors replaced the control board once replaced the ICM once and replaced the entire wiring harness once, replaced the Air flow switch (that was before I knew you could simply blow into it to get it to open again). Chlorine. Salt Water Generator. SWG Type. Pentair Intellichlor IC-60. Mar 30, 2020. #2. The Sta-Rite Max-E-Therm is the same as the Pentair MasterTemp so read up on fixes for both heaters. Three flashes on the Fenwal box indicates no flame being sensed. You probably have a flame rectification problem.Oct 4, 2020 · I do have an ET. Based on these suggestions I may try to calibrate the water temp sensor from the ET and see if it will save. The main issue is it is not saving from the app. Or it’s faulty. This is what I understood. Please correct me if wrong. The ET sends the set point to the heater which kicks it on initially. To get to the root of such problems, you should: • Check the gas valve. To do so, remove the wire running between the gas valve and the thermostat. If the heater doesn’t shut off, you have a faulty valve that must be replaced. If the heater does shut off, the gas valve is OK, but you know you have a control problem.Pentair MasterTemp 400 Installation And User Manual (68 pages) POOL AND SPA HEATER (FOR OUTDOOR USE ONLY) Brand: Pentair | Category: Heater | Size: 10.86 MB. Table of Contents. Product HIN / Code Requirements / Safety Warning. 2.In this video I will show you what steps I went through to troubleshoot the no heating issue with my Pentair MasterTemp 250 pool heater.#pentair #poolheater ...You need to remove the top screws on the upper left and right and flip down the control panel. You will then see the low voltage connections. The two wires should connect to J19. The black wire goes up the left hand low voltage channel and into the top low voltage area. It does not connect to any "breaker".If it does not open, then it is damaged and malfunctioning. You need to replace it with a new one. A poor manifold bypass. A poor manifold bypass can be a potential reason why you may be getting the wrong temperature on your Pentair MasterTemp 400’s display. Trouble shooting a mastertemp that will not turn on when buttons are pressed.Everything in my Pentair Mastertemp Heater is working properly except the LCD screen that displays the temp. I can see that the backlight is coming on but there is no display of numbers. All buttons on pad work as normal and from reading other threads I realize the LCD screen is on the control board.Heat Exchanger Troubleshooting How does a Pentair Mastertemp Swimming Pool Heater work? A Pentair Mastertemp heater is actually a very simple appliance that becomes more complicated due to all of the …Here's an excerpt from the heater manual: To connect a 2-Wire Control (such as Pentair’s IntelliTouch or EasyTouch) or a timer: * Remove the factory installed jumper from the Fireman’s Switch terminals. * Connect wires between the Fireman’s Switch terminals on the heater and the relay. Connect wires from the controller or timer to the ...The regular mastertemp puts about 336,000 btu in the water every hour. The 400 hd puts about 328,000 btu in the water every hour. 35,000 gallons is 291,900 lbs, which means that you should get about 1.15 degrees per hour from the regular mastertemp or 1.12 degrees per hour from the hd model. You also have to account for heat loss, …I had my pentair ultratemp heat pump control board replaced 1.5 years ago as it wasnt working, coukdnt adjust temp up or down. Then last summer, the whole heater stopped working. Seemed like the contr … read morePentair Mastertemp heater will not come on. When breaker is turned off and then back on a code 888 then 12A then r14 comes on but then screen goes blank. Contractor's Assistant: I'll do all I can to help. ... mastertemp 125 is not working displays shows trouble code 14 ...#1 Good Morning Everyone, We opened our pool a couple of days ago with no issues. We went to turn up the heat yesterday and the display that shows the temperature is not displaying anything. I am able to press the "pool on" button and the green light will show up, however, nothing appears on the small display.You need to remove the top screws on the upper left and right and flip down the control panel. You will then see the low voltage connections. The two wires should connect to J19. The black wire goes up the left hand low voltage channel and into the top low voltage area. It does not connect to any "breaker".Dec 27, 2016 · CajunGuy. I went to turn on my pool heater today (hadn't turned it on in about 2-3 months) and noticed the temperature up/increase button doesn't work. I can turn down the temp setting, but the up button doesn't work to increase the setting. Everything else seems fine, it still fires up and heats up, it's just that one button isn't working. The display does not light nor the heater power on. All external breakers are on and intact. no visible wiring problems externally. ... Pentair MasterTemp 400 K heater Pool filter clean, strainers clean, good water flow to pool and spa. ... Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which …Salt Water Generator. SWG Type. Pentair Intellichlor IC-60. Apr 29, 2020. #13. Bad water chemistry that causes a heat exchanger to rot out is going to cause other problems as well. All of the components in the header/manifold (HLS, thermistors, thermal regulator, etc) have been in contact with that same water.Dec 22, 2020 · Pentair MasterTemp Heaters - Further Reading. www.troublefreepool.com. Maximum Temperature Set Point. The heater comes factory set with a maximum temperature set point at 78° F (25.6 c). for the pool mode and 100° F (37.8 C). The Installation Manual describes how to increase the maximum temperature set point of the pool and spa. Jun 21, 2022. #1. Having trouble getting my EasyTouch to control the MasterTemp 400 (pool use). MT works fine when I manually control it on the MT panel. ET doesn’t seem to turn MT on or off when I turn on or off filter pump or on or off heat mode on ET, or adjust ET thermostat above/below current temp. Pool installer is sadly not ...Turn on the heat on the EasyTouch so the heater turn on and the front panel lights up. Press SPA ON. Then use the TEMP UP red arrow to raise the temperature to 104. Ignore the 319 in the picture below. Normally it displays the water temperature or the set temperature when you are adjusting it.My pentair 400 mastertemp is not heating the display is. my pentair 400 mastertemp is not heating the display is showing a r+8 128 code ... Heater not working. Still within 3 year warranty. Pentair. It didn't come on a few weeks ago.if you have any questions please contact us through our website at: https://www.poolspecialists.com/In today’s digital age, having a strong portfolio is essential for showcasing your skills and attracting potential clients or employers. However, simply displaying your work in a traditional format may not be enough to grab the attention of...Mar 26, 2022 · The Pentair MasterTemp common problems include- ignition failure, temperature problems, heater keeps exit away, display not working and the heater not turning on. Besides, the heater turning on automatically, the sweetheart won’t stay lit, the blower none working, low irrigate currents, bugs codes, a faulty control panel, dirty filter, noise, freeze damage, and heat exchanger Dec 16, 2018. 18. Jacksonville. Dec 16, 2018. #1. I have a pentair easy touch system with a pentair mastertemp 400 heater. The heater won't turn on because it's displaying 126 as the temperature. I replaced the thermistor twice so it's not that. I also tried replacing the control board on the mastertemp 400 and it was still displaying 126.The Pentair MasterTemp gemeinsame problems include- ignition failure, temperature problems, heater keeps exclude off, display not working and the space …Slide projectors work by shining light through specialized photographs called slides. When the light goes through the slide, it enlarges the photograph and displays the image on a screen or on the wall. Usually, slide projectors use a carou...It depends on what the issue you are facing is. But most issues are fixable. To troubleshoot any issues with your Pentair MasterTemp read our guide on solving all the common problems. What does Flo mean by a pool heater? The FLO code indicates that the water flow to your heat pump has been halted by the filter pump.See full list on heaterfixlab.com The instructions below will walk you through replacing the Pentair MasterTemp 400 Ignition control module. Step 1: Take off the left side panel of the heater. Step 2: Disconnect the system from the Max-E-Therm heater. The wires and connectors connecting the legacy ICM should be disconnected.I have a Pentair Mastertemp 125. Not quite four years old with an Intermatic Multi Wave control system Desired set temperature on Intermatic hand held remote is 104 deg Current temperature on Intermat ... mastertemp 125 is not working displays shows trouble code 14 ...5.0 (1 REVIEW) $107.78. Quantity. Pool Supply Unlimited has some of the best prices when shopping for Pentair MasterTemp Membrane Pad Kit | 472610Z.A code is E06 call on my Pentair heater and a changed the sensor but heater still not working. ... my pentair 400 mastertemp is not heating the display is showing a r+8 128 code ... weh you switch on the power the display …Apr 20, 2022 · Apr 19, 2022. #1. I have a Mastertemp 400 pool and spa heater. It does 1 of 2 things currently: 1) Reads in the inlet temperature in the 90s, water is likely in the 70s. Heater will kick on and heat for about a minute before the temperature rises to 126 rapidly and kicks off the heater. 2) When turned on the water temperature shows above 104 so ... Caution: Do not overtighten clamp. 3. Route the cable up through the low voltage compartment of the Load Center or Power Center to the Outdoor Control Panel circuit board. 4. Strip wires back 1/4 inch. Connect the sensor wires to WATER screw terminals. See page 4 and 5 for screw terminal location. Ambient Air Temperature (Freeze Protection)Dec 27, 2016 · CajunGuy. I went to turn on my pool heater today (hadn't turned it on in about 2-3 months) and noticed the temperature up/increase button doesn't work. I can turn down the temp setting, but the up button doesn't work to increase the setting. Everything else seems fine, it still fires up and heats up, it's just that one button isn't working. Dec 16, 2018. 18. Jacksonville. Dec 16, 2018. #1. I have a pentair easy touch system with a pentair mastertemp 400 heater. The heater won't turn on because it's displaying 126 as the temperature. I replaced the thermistor twice so it's not that. I also tried replacing the control board on the mastertemp 400 and it was still displaying 126.To avoid this problem, clean the pipes and use soft water instead. 2. Inaccurate Temperature Control or Display. Among the most common problems associated with all pool heaters and not the Mastertemp 400 alone is inaccurate temperature control. In some cases, the water can become too hot or too cold.

3. Broken Thermal Regulator. A broken thermal regulator or thermostat is another reason why you may be getting the wrong temperature on your Pentair MasterTemp 400’s display. Solution: You can take out the thermal regulator and test its continuity. The Thermal Regulator is situated between the inlet and outlet fittings in the …. John deere l130 transmission drive belt diagram

Power on, start the pump, and be sure the heater is turned on at the touch pad. If the heater lights, check that 2-conductor wire all the way to the panel for any break in the line (most likely caused by rodent damage). After that, if you don't see damage, you can reconnect the wire in the heater, disconnect the wire in the panel, twist the ...CajunGuy. I went to turn on my pool heater today (hadn't turned it on in about 2-3 months) and noticed the temperature up/increase button doesn't work. I can turn down the temp setting, but the up button doesn't work to increase the setting. Everything else seems fine, it still fires up and heats up, it's just that one button isn't working.Good Morning Everyone, We opened our pool a couple off days ago with no issues. We went in bend upside the heat yesterday and the display that schauspiel the...Pentair Pool Quick Link for Parts/Equipment: https://amzn.to/3q6MXmf Mastertemp Pool Heater Parts: https://amzn.to/391FMioThe Legendary Escapes team is build...The Pentair Compool, and LX80 Control Systems use a different TS5L sensor . Press the Program key. Press the Spa Heat Source key. Enter correct pool temperature (using the up and down arrow keys) and press Spa Heat Source key. At this point, you can just hit the Program key and exit calibration. Enter correct solar …Apr 28, 2021 · 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. The manufacturing date, along with model number, can be found on the serial number sticker on the heater. Recalled Pool Heater Model Numbers. Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship.Reason 1: The flow of water to the heater has reduced. Solution: Servicing on the pump or on the filter will fix this issue. Reason 2: Plugging of the exchanger. Solution: Alter the chemistry of the water and reach an equilibrium. You could also take the heat exchanger for …For a test replace the thermistor with a 10K resistor. If the temperature stays at 76F while the Aqualink heats the water to 101 then you have a problem with the thermistor. If the heater still will not heat to 101 then you need to check the thermal regulator or the bypass valve in the header. Last edited: Dec 23, 2021.Jul 31, 2021 · I have a Pentair HeatMaster 400 (1.5 years old) that does the following when I turn on the heater from the app or the EasyTouch panel: 1. Display comes on with "888". 2. service heater light on. 3. service system light on. 4. display shows "128 r14". 5. then display and lights turn off. I don't hear the heater "fire up" or may any noise (not ... Make sure your pool heater’s igniter is not too cold, and it is warming up to fire up. Properly clean the clogged igniter and remove the igniter dirt or debris build-up. 2. Inadequate Gas Pressure. The gas valve inlet’s inappropriate gas pressure is another reason why your Pentair mastertemp 125 won’t ignite.Mar 2, 2011. 40,366. Oct 24, 2021. #2. Turn the heater on. The fan will come on for about 30 seconds, then you will hear a click, and the heater should fire. At that moment, which ever thermostat you are using (POOL or SPA) hold that button down for ~10 seconds. Display should change from water temp to exhaust temp.April 9, 2023 by William. Pentair Mastertemp 400 common problems include displaying the wrong temperature, low water circulation, leaking water, water scaling, and corroded heat exchanger. Some other problems that Pentair Mastertemp 400 pool heater users face are the blower not working, not heating, not igniting, not turning on, knocking noise ....

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