But it does not throw any codes when it’s running on cool and it cools well. Thanks for asking this question. determine if it’s air. In August 2019 I noticed a loud sound coming from the upstairs outside air condenser. Is anyone familiar with the high pressure re-set button located on Rheem heat pumps. And if it is the case, would that be just another symptom of some larger cause? Evacuate and recharge. Whether you need high water delivery or low energy costs—or both, we have your next water heater. You would need to attach manifold gauges to see if you have a restriction, an actual high-pressure problem, or what the problem is. Hi Gary! So sorry to hear that this happened to you! Steve. checked all pressures. Yes, this is extremely high and should not happen. • Recover refrigerant. • Compressor stuck, grounded or open motor winding, open internal overload. This sounds like you might have a slow blower motor or your indoor coil is dirty. The tables below contain the lists of possible breakdowns which may happen with Rheem heat pumps of different modifications. Here’s the scenario. If you are looking for an HVAC products supplier that will treat you the way you should be treated, turn to us. With the thermostat calling for cooling you should have 24 to 28 volts between the Y and C terminals to energize the outdoor contactor. There are types of faults and problems with detailed descriptions, possible causes and solutions which may be recommended in the certain situations. Make sure they are tight and there is no burning in those wires. Replace motor or capacitor. Working differently from traditional storage water heaters, gas continuous flow water heaters only If you are in cooling mode with the new outdoor unit is going off on the high-pressure safety switch then I would think that your unit is over-charged or you have a restriction in the refrigeration cycle. In case of Rheem heat pump not working you should address these checklists. Does valve operate correctly now? The control board on my ac/heat pump shows a high pressure switch fault. We sell furnace parts, air conditioning parts, AprilAire filters, EZ Flex filters, and many other HVAC parts and supplies at affordable prices. I have to reset condensing unit and it will run fine through that cyle then repeats problem. My warranty company provided a Goodman when I wanted a York. -Charge migration could have occurred resulting in high compression ratio. How our day has typically unfolded in the past few days: the outside unit cools/runs fine in the morning hours, until about 3/4pm (it does not matter if it is 70s outside or 90s), then does not run (the thermostat kicks on and the attic unit blows air but the outside fan does not come on), but then the outside unit is operational again about 4 hours later in the evening. Problems that would cause high head pressure would be a dirty condensing unit, slow fan motor, over-charge or refrigerant or a blockage in the refrigeration cycle. - Verify crimp terminals in the ICC to inverter communication cable are fully inserted and making good contact with the receptacle. I would suggest that you start testing with a volt meter between R and C you should have 24 to 28 volts. then after storm passed unit would not cool. We would love to have your business! Steve. on all night. did not having the pressure switch have anything to do with it? The pressure readings when the problem occurs should tell the story of what is happening. Steve, an a/c guy disconnected the high pressure switch on our outdoors 2002 Ruud unit because it kept tripping and he said the switch was not needed. So sorry that you are out of AC! - Check continuity of discharge line thermistor and connection at the drive. match single stage Heat Pump to variable speed blower? If you feel the temperature in your house is getting higher, it may be because of heat pump fan not spinning, and therefore, heat pump not cooling. Problem: My outdoor air conditioning unit’s high pressure switch trips ever so often. Steve. High-pressure switches are usually set to trip at a little over 300 psi. On heat pumps the indoor coil becomes the condenser in the wintertime and if you are not getting enough airflow across the indoor coil it with cause the high-pressure code problem. That is your decision. The high- pressure control opens at 610 PSIG. With almost all air conditioners if you are home to hear and turn the unit off when running high pressure that is great and you have saved your unit, but if you are not at home to hear the problem for days then it could ruin your AC unit. We would love to answer your questions and have your business! Lately the unit throws a High Pressure Lockout code on the circuit board (47-102685-06). I hope you can easily find and fix the problem. Could it be high pressure switch sensor? I always recommend turning AC units off during storms because this can be fatal with power going off and on, power surges and lots of water. Now, it’s their building, their unit; they vacuum coils and replace filters annually, and we have a working circuit breaker in the apartment (and renters’ insurance). I wish I could upload a picture of what Im looking at for you guys. I tested continuity on the HPS and it is open. Hi Steve, I am working in an industry on a HVAC system. I have never seen a low-pressure sensor from the factory that has a Shrader valve. Yes, that is weird that it trips so quickly on high pressure. 4. If not you have a transformer or broken wire problem. Turn off the power and clean with a garden hose. A/C or Heat Pump Compressor High Head Pressure Diagnostic Checklist 12 Causes of High Head Pressure at an Air Conditioner, Heat Pump or other Refrigeration System. I happened to reset the HP switch and the unit will run again for couple of days and turn off. Yes, your contractor is right by telling you that the high-pressure switch is expensive to replace because most replacements require opening up the system, reclaiming the charge brazing in a new high-pressure switch, installing a filter drier, evacuating the system with a vacuum pump and recharging the system. Thanks in advance, Hi Eric! • Thermostat out of calibration - set too high. A heat pump that doesn’t turn on is a fairly common and easily remedied problem. Why does the high pressure switch trip so often? -Power cycle the system. - Check Thermistor continuity. Tech said micro-channels are know for that and not a fan of the new technology. Replace air filter. The other 4 remaining prongs are at the oposite end of the 220 side. Long-lasting materials. So he by passed the HPS and connected the wire somewhere else so it will send power and the AC unit turned on. Thanks so much for this useful info. After a while now the fan in the outside unit only partially works. If the service tech installed gauges to test your system then he should have seen the high-pressure problem. The unit should not have been running in a storm. If you do not have 24 volts between Y and C then you either have a thermostat problem or a broken thermostat wire problem. When you’re ready to install your Rheem heat pump, or if you just have a question on which one to choose, look no further than a trustworthy, independent Rheem Pro that’s likely just down the street. Add filter drier. I hope that it will go away. Steve. I hope you find an easy inexpensive solution to the problem. -Cycle power - remove power until all the lights on the inverter have gone out. We Have Promptly Shipped Over 350,000 Orders Since 2002! Can the AC continue to run w/out HPS being fixed? If you have any other questions please feel free to email us at support@arnoldservice.com or comment in the comments section below. Fan won’t move, when the unit is turned on it just says “trip”. This sounds like you have a restriction in your system. Steve. Also see high head pressure remedy. In case of Rheem heat pump not working you should address these checklists. Free repair advice! -Check return voltage between Black and Green terminals on back of control board. Choose the right Rheem for your home. If you have more questions please let me know by emailing me at arnoldservice@gmail.com email address. I had a repair guy come and look at it. Motor or fan blade going the wrong direction. Thanks so much for asking the question. I could not believe that happened and I had to replace that valve to fix the compressor. Thank you Steve for all you do and for all of the help!! Hi Carlos! lol. 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