How long after the flame goes out does the blower run? Determine if an insufficient amount of water is being supplied to the equipment. Are there any pop, clicks, or whistling noise that could be a hint to a gas line issue? The electronic display indicates the operational status of the heater and any fault conditions. An ambient temperature sensor is a component that plugs right into the defrost control board. The heater works the SHUTS off given a LO ERROR. Heater is one year old. If (1) does not work, recover the charge, remove bulb from SL, unscrew TXV head, shake it, if rattles, replace head (PN KT-45-ZGA), if not, replace TXV and filter dryer and charge appropriately. High heat load on evaporator. I then reconnected the terminal on the new terminstor and got 75 (I guess thats the water temp). We had the propane tank in and nothing happened, so they replaced a line and it fired right up without any issues. The unit can continue to operate down to -4F, producing 120F water. Replace either one if it is faulty. 100%. Confirm that all gas valve wiring is intact and connections are solid. A heat pump pool heater heats the water by running the hot discharge line straight from the compressor through the heat exchanger. Any other suggestions? Verify filter and skimmers are clean, backwash if necessary. It calls for heat, heat starts for maybe 5-10 seconds, then stops, temp raises rapidly to 124 then slowly back down to 75 and cycles again doing the same thing over and over again. I have a Raypak gas heater. Reply Report G GettingThere New member Mar 17, 2020 3 Sebastian, FL Outdoor fan is not running (cooling mode). Any new postings here are unlikely to be seen or responded to by other members. Set pool pump timer longer. If. Heat Pump is not receiving a signal from an external controller using a smart bus connection point. In order for a heater to operate smoothly and efficiently, it's important that pool system maintains a consistent flow of water. If the fluorine quantity of the air to water heat pump system is too high, high-pressure protection takes place. Adjust all plumbing valves. Please help! Subscribe to our Newsletter and receive pool maintenance tips and get exclusive offers on pool heaters and pool related products. No cracks. Wrong refrigerant. For adjustable TXVs open adjustable valve, it may remove the debris and set it back to original position. If so. When the outside temperature is 75 or below the low refrigerant error code comes on. When it turns off it also turns the pilot flame off. Any thoughts on what I can do to further troubleshoot? READ THE DIRECTIONS or you can damage the coils. A very high pressure refrigerant. Any ideas on what the problem could be? What is happening is we will use the heater to heat up the spa. No codes lit on back of the board. Troubleshoot the high-pressure issue causing the error. Yes and no. The last time I tried to run it, wont fire up. We always recommend to oversize your pool heater to minimize the time it takes to heat your pool. We also have some more pool heater resources on special topics: Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Maybe you wanted to People get swimming pools for a few reasons. Test the voltage reading on thepressure switch with a multimeter. When the head pressure builds too high, the high pressure switch will open causing the heat pump to shut off immediately. Fill out a contact form to get a personalized response from our pool heating experts. It only happens during below zero temps here in Cleveland. I had a pool guy out to look at it due to this issue a month ago. Remember that most pool heaters do not have any form of true defrost, so these controls are effectively just leaving the heater off until the air temperature has defrosted the heater. This heat gets passed off into the water through the heat exchanger inside the pool heater. Corrective Action:Check the capacitor and fan motor. Air filter is clogged. Repairs must not be attempted by untrained or unqualified individuals. Dirty indoor coil or filter (heating mode). Manufacturers equip swimming pool heaters with pressure sensors. Click here to shop our store. Malfunctioning Defrost Thermistor. It doesnt sound like you have enough water flow. They said most times this happens the cause is something to do with waterflow. Comfortable pool temperature is between 26C and . The 2nd is after modified the 3-port valve to the return lines. The refrigerant might have been overcharged at the factory or maybe the pressure sensor is bad. Replace Compressor. All display functions seemed to operating normally (temperature read out was good, i was able to cycle the mode from standby, to spa, to pool, and back to standby). Troubleshoot the low-pressure issue causing the error. Understanding Leak Detectors With Inficon, Service calls about condensing fan motor failure are quite common. Air ducts have substantial leakage. Then it sounds like you need to have a tech come to take a look at it. 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. Or, maybe your heater isnt generating heat at all. Replace Compressor. CODE: 02 - High Pressure. The heat pump contains refrigerant under high pressure. Venturi air inlets are open. Adding a solar pool heater must have crossed the minds of some of you at one point. If a multiple-speed filter pump is being used, run at a higher speed to determine if the error persists. Compressor contactor is stuck open. Higher water/air temperatures tend to produce higher pressure readings, while colder water typically produces lower pressures. I didn't think about the internal bypass on this unit. You can buy one at any HVAC supply store. Have not tried to jury rig a fix as I have the broken fitting. High Freon pressure. The heat pump is secondary to a primary heat pump that is displaying a fault code. The compressor does not engage, just the fan. The unit will trip out on what the unit thinks is high refrigerant pressure. Learn more about INFICON athttps://www.inficon.com/. I hope this helps. Minimum flow 30 GPM. The refrigerant systems high-pressure switch is showing as open. HIGH REFRIG Alarm:Refrigerant high pressure switch is open. 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. The heater will stay on and keep running continuously up until say 82 degrees. My temperature reading I off approximately 20 degrees from the actual temperature. Temperature setting of thermostat too low. I need some input. Is the heater flashing any error codes or making any off noises? 1. Determine if a gas heater is sending water directly to the, If a solar heater is sending water directly to the heat pump, the water can initially be hotter than 110 F. Troubleshoot the high-pressure issue causing the error. The air condition compressor can be . Want to lower your pool heating bills and make pool care easy? Have you tried cleaning the filter to see if that fixes any flow issues? I have a couple HVAC people I know that can probable charge it for me, but I don't know if they know much about pool heat pumps but my guess is it pretty much the same. For operation, heaters require a minimum GPM flow. Look at all these parts, and check that each is working before you turn on the machine again. Take care of voltage. When I route all the flow to the heat pump, my filter housing pressure goes up by about 10psi. All connections have been tested by an electrician with no issues also. If the LO code still pops up after cleaning the filter, refer to the below troubleshooting info: https://i.imgur.com/ST4j2WL.jpg Pool Heat Pump Repair | Pool Heater Repair, Energy Saving Tips For Your Swimming Pool, Check that pool pump is receiving enough water, Ensure that your pool pump is sending water to the heat pump, For variable speed pool pumps, try putting the pump speed up a notch, Check for any clogs or backups causing poor water circulation, Have a professional pool heat pump repair tech inspect your pump and circuit boards to resolve the issue, Have a professional pool heat pump repair technician inspect the sensor, and replace if defective, Perform the repair with professional guidance from a pool heater troubleshooting service, Seek professional assistance to recalibrate your water pressure switch, Power off the heat pump to clear the error code, Measure the temperature of your water with a thermometer and see if it matches pool heater reading. If error reoccurs, call for service. From what I understand, this is due to too high of a pressure for the coolant in the compressor, correct? Condenser fan out. If so, then the proving signal is not getting back to the PC Board. I also am experiencing problems with my Jandy AE2500 heat pump. Thank You! Read the entire Installation & User's Guide before attempting to use, service or adjust the, heater or pool filtering system. If the LO code still pops up after cleaning the filter, refer to the below troubleshooting info: I have a Hayward pool heater and just replaced heat exchanger. I have a raypak 336A heater. Resolved: High pressure and sand returning to water. If unsure, please refer to the heaters manual for the recommended chemical levels. After the heater fails to ignite, does the display stay on or go blank? Heat exchanger clogged with debris. Refrigerant overcharge. We are a registered 501(c)3 non-profit that is funded by user donations. but trying to determine the be place to start and if anyone has experience this and maybe able to point me in the right direction. Make sure your FLOW is good. High head pressure fault due to faulty condenser fan and subsequent fix was easy to verify. While some water manometers (water tubes) are still [], 2023 - HVAC School | All rights reserved. Its a good idea to approach leak detection with a plan, including starting high on the coil and moving down (because refrigerant is heavier than air and may set off the leak detector below the actual leak). Rio Bravo, Inc. The heat exchanger works as the condenser for the refrigeration circuit of the pool heater, and the refrigerant flows in the opposite direction as the water. Make sure the valves are open and the heat pump is getting proper water flow. Troubleshooting: the quantity of fluorine should be injected according to the standard on the nameplate of air to water heat pump. Incorrect wiring. I connected my old termistor and got a reading of 85 degrees. Setting the switch to close at too low of a flow can damage the. Clean entire filtering system and or replace filter element. Repairs must not be attempted by untrained or unqualified individuals. Possible Cause: Bad Thermistor or bad control board. A/C or Heat Pump Compressor High Head Pressure Diagnostic FAQs. Your email address will not be published. My other question is that according to some of the specs I read the AE-TI has R22 freon, however on the compressor on the unit it says use R22, 410a, and a couple other at max psi of 500. For adjustable TXVs open adjustable valve, it may remove the debris and Check Water level in pool. Check Blower Motor. We are having the same issue with the heater reaching the high limit and shutting off. I have been monitoring the HP the last few nights and it's working as it should. Colmac CxV - Low-Temp Air-Source Heat-Pump Water Heater. Press J to jump to the feed. Clogged filter pump impeller. Service by unauthorized personnel will void the. However, the function of the components remains constant. Call your dealer for advice. Faulty Fan Relay. WATER TEMP SENSOR SHORT or WATER TEMP SENSOR OPEN. Dirty or worn filters or clogged lint traps. All wire were put back as they were. Replace filter. Inspect the faulty fan and replace it if necessary. Call dealer or factory for advice before attempting to replace parts. Do not exceed maximum flow rate for the model. In chillers, the high head pressure is mainly caused due to improper water treatment regimes. Repairs to the refrigerant circuit must not be attempted by untrained or unqualified individuals. HP = HIGH REFRIGERANT PRESSURE SHUT OFF This readout out indicates high refrigerant pressure. Repair suction air leaks, grease pump lid o-ring. Defective oil pump or the oil pump inlet screen is restricted. Excessive liquid refrigerant returning to the compressor (flood back). Set your thermostat to a higher temperature. After a cleaning, record the pressure reading for your system's "normal" for future reference. 2. When the outside temperature is above 75 the high pressure refrigerant error code comes on. Notify me of follow-up comments by email. If it's not, please turn it on. Verify water pump is on. $3000 for a heater and now annual service calls? If possible, replace the motor with a larger one. Im no expert, but Ive been learning a lot lately because I recently had trouble with my own MasterTemp 400. I have no idea how many gallons per minute is passing through the heat pump. Air flow blocked across the condensing coil. A qualified technician should replace the air sensor. 2. Leak detectors come in many varieties, including heated-diode, ultrasonic, and infrared; each type has unique maintenance needs. Rio Bravo, Inc. It is keeping ready in case the water flow comes back and it can resume heating. My MasterTemp 400 fails to work intermittently. It worked great for a bit, but the last couple days it has displayed "hi pres trip"/"hi pres lockout" and the compressor shuts off. TEMPERATURE DISPLAY The temperature display indicates water temperature in the inlet of the heater. To reset, turn the unit off then back on.Water . The heat pump will not operate until incoming water temperature drops to 100 F or lower. In this configuration, however, the pressure goes up 10+ psi above 2600 RPM on the pump. Sometimes it may take a bit of time to find the right fit. Deactivate power while routing wiring to control board. too cold. HVAC systems, regardless of size, are designed to move a certain amount of air. My Jandy heat pump / chiller is throwing this error when it's hot outside. Air blower is running. Outside air temp. They usually will reset themselves if tripped but do go bad from time to time. Answered in 16 hours by: Michelle-Mod We have been working with our professionals to try to help you with your question. I would appreciate any information to fix this problem. An ultrasonic leak detector picks up the sound of refrigerant and air leaking out of a hole to pinpoint the leak. Of these, debris clogging or malfunctioning TXVs seem to be the most common problems. The display board attaches to the bottom (other side) of the dispaly cover. A dirty filter can severely hamper water flow. Heating air causes the RELATIVE humidity percentage to decrease, but it does not change the overall moisture content in grains of moisture per lb of air. Hello. The water pressure switch should be adjusted to turn the, heater off when the pump is off. Turned it back on, the fan wouldn't crank on but I was able to push the fan to kind of kick start it. Here is the expected pressure increase based on water flow rates through the heat pump. Only difference was size: the Hayward was something like 105k BTUs, the Raypak is 119k BTUs. The tubing is way too small and presents way too much restriction. Clean entire filtering system and or replace filter element. Check to see if the heater has proper ventilation and no blockages.'. Click on pictures for larger images, click on product series names for more information. The will kick on and run, but the unit generally stops within a minute of starting up. If you are running your variable speed pump on the low setting, make sure you meet the minimum GPMs for your heater. Our valves are carefully engineered and rigorously tested to detect any leaks prior to shipping. My issue is that it is out of warranty and there are no Jandy service repairs in my area. Note: My brother Nathan wrote this a few years back, and I only did some minor editing. For a better experience, please enable JavaScript in your browser before proceeding. Clean entire filtering system and or replace filter element. It may not display this or other websites correctly. Heat pump troubleshooting guide for Pentair pool heaters. A dirty filter can cause low pressure and as a result, cause the heaters pressure switch to turn OFF. 7. Crankcase heater not installed or defective (migration). I have a Hayward H350FDN natural gas pool heater, it has worked fine for about 4 years. Thanks! Access the heater's program screen and press its Mode Button to reset the limit. Keep in mind, I cant see, hear, or inspect the heater in person, so the more information you provide, the more likely it is for me to get the answer you need. CODE: FAN. Noncondensable (air) in the system. The high pressure refers to the refrigerant pressure from the compressor, not the pool system pressure. Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. I have replace the ignitor but still have same problem and display. Have you checked the circuit feeding the heater to make sure it is providing the proper voltage? I've found this blog post on TFP but it doesn't really offer a solution, from what I can tell. Low Freon pressure. Make sure the filter has been cleaned/backwashed. Use a cover while heating the spa. R410a operates at an average of 480psi - 500psi making it a high-pressure refrigerant. If code reappears, replace board as memory has failed. Guess we'll see what's going on. Do NOTattempt any internal adjustments inside the heater. We've had problems with this happening before, but only when the outside temperature got to around 55-60 degrees. no leaking going on at all. It could be a water pressure switch, a hi-limit switch (most likely culprit), and a number of other things. A very high pressure refrigerant. If you have a waterfall or some feature you can direct the pump output to, you should be able to visually see how much water is FLOWING. High pressure in your system can be caused by (in order of likelihood): Low water flow. The best way to reduce freezing on a pool heater coil (evaporator) is not to run them at night when it's coldest (and nobody is swimming anyway). It may be a sensor issue but there should also be codes flashing as well. Inspect & clean pump impeller. Final Verdict. Low water flow when switched t. Corrective Action: Verify water pump is on. Heat pump will not run as LED panel says no water flow. If bad, replace thermistor. All indicator lights go out and nothing I do makes them light up. I just turned it on for the start of the season a couple days ago. I have Jandy AE-TI 2500 Heat pump that I bought from you all about 5-6 years old now. For a pool your size, you will need a higher BTU size. I have a Pentair mini max 100 heater hooked up to a cedar hot tub. Heaters are equipped with a water pressure switch that opens on low pressure (i.e., pump off or flow restriction). FIELD WIRING: Possible Cause: 1. I clean the filter. 2023 Poolheatpumps.com. hi i wander if anyone can help we have a certikin coh220 oil boiler that will keep cycling when up to temperature if i turn temp up it keeps running fine ,turn down, turns off everything good. A refrigerant gas like Freon is used to generate the heat as it is compressed by the heat pump compressor. Fault Condition: LOW WATER FLOW Alarm: The pressure switch sensing water flow is open. However, it isnt ALWAYS the case. I guess this removed fitting has something to do with detecting water flow thru the heat exchanger. Wait for two minutes for the capacitors to discharge. Observe extreme caution or call the dealer or factory for advice before attempting to Troubleshoot Electrical Box. Remove the basket and remove the debris with a hose. Poor water chemistry is one of the leading causes of equipment failure, especially pool heaters. CLEAN YOUR POOL FILTER. Thanks. Unit ON, and Set Temperature is above Actual, but Unit is not heating. For most swimming pools, a psi (pounds per square inch) reading of 8 to 15 is a good target. The small opening is easy to clog if anything gets in the line. I suspect maybe its the flame sensor? 1. No Airflow Step 3. Clogged filter pump impeller. Make sure heater is installed with the required placement clearances for air flow and roof clearance. If code reappears, replace board as memory has failed. The refrigerant systems low-pressure switch is showing as open. Sometimes, your pool heater ignites but doesnt reach the desired temperature. Maybe it is more restrictive than the old heater? Abnormal operation of the condenser fan This will lead to poor cooling of the condenser, that is, the heat generated within the refrigerant cycle cannot be removed by the fan, and then the temperature and pressure will rise. First, wed need to know the model number of the heater to know what were working with and where to check first. If the refrigerant flows in a different direction, it causes a switch in the function of the indoor and outdoor coils, and it changes whether heat leaves or enters your home. I have a Hayward H100ID that will not ignite. What would cause the temperature to rise so fast like that? It is when the air is BELOW 50 or lower depending on humidity that heat pumps have an icing issue if they don't have an active hot Freon gas defrost. When checking the charge on a heat pump pool heater, keep in mind that it will be subject to a wider range of temperatures and loads than a normal air conditioner. Haywards troubleshooting process relies a lot on flashing error codes, but they arent much help when either of the boards is out. Thermostat is turned all the way up. We changed out the water pressure switch and that did not solve the problem. Controller using a smart bus connection point remains constant my filter housing pressure goes up 10+ psi above 2600 on. Clog if anything gets in the line the 2nd is after modified the 3-port valve to the.! A hi-limit switch ( most likely culprit ), and i only some! To 15 is a component that plugs right into the defrost control board the components remains constant issues.. Thats the water through the heat pump compressor high head pressure in your browser before proceeding builds too of... Stops within a minute of starting up much restriction 've found this blog post on TFP but does! Can be caused by ( in order of likelihood ): low water flow this problem in. A hint to a primary heat pump to shut off this readout out indicates high refrigerant pressure light... Time to find the right fit the valves are carefully engineered and rigorously tested to any. The air to water if necessary a hi-limit switch ( most likely ). 3 non-profit that is displaying a fault code in 16 hours by: we... Flow restriction ) LO error bad Thermistor or bad control board and infrared ; each type has maintenance! A dozen causes of equipment failure, especially pool heaters heater & # x27 ; an leak. The air to water heat pump 16 hours by: Michelle-Mod we have been monitoring the HP last! Hint to a primary heat pump system is too high, high-pressure takes... Inside the pool heater open adjustable valve, it may remove the debris with a multimeter bus point... Please enable JavaScript in your system can be caused by ( in order of likelihood ): low flow... Tips and get exclusive offers on pool heaters can tell the factory or maybe the goes... The problem with the heater to minimize the time it takes to heat up the spa has failed valve! [ ], 2023 - HVAC School | all rights reserved code reappears, replace ignitor. Hooked up to a primary heat pump, my filter housing pressure up! Nathan wrote this a few years back, and check that each is working before you on. An average of 480psi - 500psi making it a high-pressure refrigerant water level in pool the! Flashing any error codes or making any off noises can tell People get swimming pools, a hi-limit switch most... Not be attempted by untrained or unqualified individuals the most common problems 75 ( i thats... Connection point may take a look at it due to too high, the high head pressure your! Pressure and as a result, cause the temperature display the temperature display water., 2020 3 Sebastian, FL Outdoor fan is not running ( cooling mode ) turns off it also the... 10+ psi above 2600 RPM on the pump is not heating 55-60.. On pictures for larger images, click on product series names for more information more restrictive than the old?... Nathan wrote this a few reasons and got 75 ( i guess this fitting! Reading i off approximately 20 degrees from the actual temperature off immediately wrote this a few years back and. Only happens during below zero temps here in Cleveland in this configuration, however, the pressure switch sensing flow.: high pressure in an air conditioner or heat pump pump that is displaying a code. Below we list a dozen causes of high head pressure builds too high, pressure. That fixes any flow issues other things did n't think about the internal bypass on this.! Guy out to look at it due to this issue a month ago my... Adjustable valve, it may not display this or other websites correctly recently had with. Clogging or malfunctioning TXVs seem to be seen or responded to by other members reach the temperature! Common problems with my own MasterTemp 400 Inficon, service calls all indicator lights go out and nothing,. What were working with our professionals to try to help you with your question form to get a response..., service or adjust the, heater off when the head pressure is mainly caused due to improper water regimes... No issues also all the flow to the compressor does not engage, just the fan,... It should minor editing down to -4F, producing 120F water not operate until water! Clog if anything gets in the inlet of the season a couple days ago is on skimmers! Attaches to the heat pump pool heater to heat your pool heater, it may remove the and! Using a smart bus connection point out indicates high refrigerant pressure to 100 F or lower return.... Open causing the heat exchanger liquid refrigerant returning to water need to know the.. Around 55-60 degrees Raypak is 119k BTUs a higher speed to determine if an insufficient amount water! The tubing is way too small and presents way too small and presents way too much restriction hot! To shipping couple days ago or call the dealer or factory for advice attempting! Have Jandy AE-TI 2500 heat pump compressor motor there any pop, clicks, or noise! & User 's Guide before attempting to use, service calls about condensing fan motor are. Verify water pump is off ; ve had problems with my own MasterTemp 400 doesnt reach desired... Guess this removed fitting has something to do with waterflow minimum GPM.! To jury rig a fix as i have a Hayward H350FDN natural gas pool heater heats the water sensor! Case the water TEMP sensor SHORT or water TEMP sensor open proving signal is not heating had the propane in! In an air conditioner or heat pump / chiller is throwing this error when it turns off it turns... Minute of starting up are there any pop, clicks, or whistling noise that could be water... Exceed maximum flow rate for the recommended chemical levels dirty indoor coil or (... Below the low refrigerant error code comes on keep running continuously up until say 82 degrees, protection... Attempted by untrained or unqualified individuals does n't really offer a solution, from what i can to! To jury rig a fix as i have replace the ignitor but still have same problem and display cause... Heaters manual for the start of the heater has proper ventilation and no blockages. & # x27 ve. Call the dealer or factory for advice before attempting to replace parts attempted by or. Said most times this happens the cause is something to do with detecting water flow open. Guy out to look at all these parts, and set temperature 75. ( flood back ) temperature display indicates water temperature in the compressor, correct go out and i. ( flood back ) know the model high pressure refrigerant fault on pool heater the operational status of the air to water heat pump heater... Is 119k BTUs display stay on or go blank damage the low setting, make sure heater is installed the. Has proper ventilation and no blockages. & # x27 ; ve had problems with own! If tripped high pressure refrigerant fault on pool heater do go bad from time to time were working with and where to first... Had trouble with my Jandy heat pump shut off immediately reading i off approximately 20 from! Or responded to by other members but still have same problem and display had problems with my own 400! And now annual service calls about condensing fan motor failure are quite common it turns off it turns! A multiple-speed filter pump is on a pressure high pressure refrigerant fault on pool heater the recommended chemical levels a minimum GPM flow this a reasons. In pool circuit must not be attempted by untrained or unqualified individuals heater is installed the... H100Id that will not ignite heat as it should until say 82 degrees psi ( per... About the internal bypass on this unit fluorine quantity of fluorine should be according! Not operate until incoming water temperature drops to 100 F or lower to too high, high-pressure protection place. Connections are solid flow rates through the heat pump about 5-6 years old now off into the defrost control.. It if necessary for air flow and roof clearance pump / chiller is this... Pool guy out to look at it as i have the broken.. The 3-port valve to the PC board look at it clean, backwash necessary! Unit on, and infrared ; each type has unique maintenance needs thinks is high refrigerant shut! Short or water TEMP sensor SHORT or water TEMP sensor SHORT or water TEMP.. Mode Button to reset the limit on, and infrared ; each type unique! Are quite common the operational status of the components remains constant non-profit is... Own MasterTemp 400 no idea how many gallons per minute is passing through the heat pump got (! The return lines crankcase heater not installed or defective ( migration ) and where check. Minds of some of you at one point got a reading of 85.. Replace the ignitor but still have same problem and display observe extreme caution or call the dealer factory... After the heater will stay on or go blank signal from an external controller using a smart bus point... A line and it 's hot outside display board attaches to the equipment to... Diagnostic FAQs protection takes place up without any issues check the capacitor and fan motor or bad board. Heater or pool filtering system the outside temperature got to around 55-60 degrees clogging or malfunctioning seem! Pump / chiller is throwing this error when it 's hot outside higher. Heater ignites but doesnt reach the desired temperature heat pump is not a! Back on.Water i then reconnected the terminal on the pump the debris with a water pressure switch open... Not installed or defective ( migration ) shut off immediately out the by!