Heat pump problems can be frustrating (and expensive). I read this directly from an un-named article on the internet that has a number one position in a search for troubleshooting heat pumps – “check the heat pumps … every heat pump are the compressor and the coil. This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees Fahrenheit and only aux heat will be used in this case. If you're not talking F, I'm not sure how the water is freezing. The user can select either Normally Open or Normally Closed High voltage present in the outdoor unit and indoor unit. With this extreme cold, however, I've hit a problem. However the only option I seem to have is to run the heat pump "Always", and according to Nest support that can't be changed. If it’s particularly cold where you live, the heat pump may not be able to sufficiently heat your home and the ecobee will instead rely on your aux heat in these cases. Heat pump compressor lockout temperature? Carrier Infinity thermal lockout low/high stage. I posted about this exact thing 2 weeks ago: https://www.reddit.com/r/Nest/comments/7mizg2/force_aux_heat/. To save you time, money and frustration, the experts at Carrier have put together a quick heat pump troubleshooting guide. We have a heat pump and recently installed an ecobee thermostat. Jon Held_2 Member Posts: 21. Is a Password Requried? If the system starts up before the outdoor temperature has warmed up enough to cause the refrigerant to migrate, the refrigerant will still be sitting in the outdoor coil. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. With electric backup heat you should not need to lock out backup heat. Contractor's Assistant: Did you double-check the thermostat's … Many time when it gets cool over night, the refrigerant will migrate to the outdoor coil. And if not, what's my best alternative? When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. Then raise to temp it can handle the load. Sometimes, the sound of the outdoor unit fan or compressor relay can be transmitted in a way that makes it … 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. When a compressor has problems, both or at least one of these functions stop happening, and very likely the heat pump won’t do its job as expected. My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. Geothermal heat pump systems tap into the energy right in your own backyard—transferring heat to or from the earth to heat or cool your home. The Fast setting will determine how fast the second stage or the emergency heat comes on. I'm assuming you're talking in Fahrenheit, so, assuming your heat pump is more energy efficient than your aux heat, why not just keep the minimum temp at 40F? It does seem to be kicking in frequently instead of normal heat and got an alert that my "Aux Heat was running for more than 180 minutes". The system seems to be running the heat pump down to the teens or below and when the unit ices up it must be running in reverse to try to de-ice. In this option, please select what you find best fits for you. Should have pin settings for compressor lockout. Be sure the compressor lock-out function is disabled. Your heat pump should still put out some heat even when temps outside are below zero, not much though. System in in heat mode. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. That's exactly what I was looking for, I'll try it - thanks! A service tech should be able to set it down to a lower setting no problem. You can run a heat pump below 32 degrees with no problem it just looses effiency the colder it gets. This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees … Get in touch with our support team. Press J to jump to the feed. I then put the system back into heat mode and ran the temp back up 3 degrees the compressor did not lock out in the 30 minutes it took to get there. Hi. 4 factors that affect the price of a heat pump compressor Factor #1: Single-stage vs. two stage vs. variable speed compressors. Usually when the outside temperature is above 30° it uses heat pump only but when it’s close to 30° it uses the back up gas furnace. No 1. Fault code states "soft lock out" on both the compressor and condenser.. And his was a heat pump as far as I know it's still running. Designed for long lasting performance, the Climatuff has been There is a 10 degree dead zone between the aux lockout and compressor lockout. My question is, is there a way around this to actually set the lockout temperature? So far, that's expected with a heat pump I gather. The heat pump compressor, however, has two main purposes: to maintain the refrigerant flowing inside the heat pump and to increase the pressure in which the refrigerant is compressed into gas. When the backup heat droop is set to Comfort, the control algorithm will use backup heat as​ needed to maintain the setpoint within +/- 1 F. When you read information on the web double check that the information is correct. There is a setting in your "thresholds" section that you can change; most likely it is set to default at the moment which relies on the feedback of your heatpump system and how long it takes to warm up the home. The thermostat shall have a compressor outdoor lockout and backup heat outdoor lockout to turn off the heat pump or backup​ heat based on outdoor temperature. The information given below can be helpful for you then. It will run during defrost and if the heat pump can't keep up it will kick on when the indoor temp falls 2 degrees below the set point. An air conditioner or heat pump compressor pulls a high amp draw on startup, which is technically called locked rotor amps. Assure high voltage power is disconnected using lockout / tag-out procedures if applicable prior to connecting low voltage wiring. If you have a dual fuel system, a type of system with a heat pump outside and a separate heater installed inside your home, you won't be able to use Heat Pump Balance. In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. We have been getting down to 6 degrees F with snow recently, which is when the problem manifested. Yes, I'm talking Fahrenheit. Heat Pump Split System and AY28X084 Evaporator Defrost Control Thermostat Air handling unit Heat pump Thermostat unit Air handling unit Cooling unit Warning! Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. What could be the problem? 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. Outdoor heat pump coils are usually around 6 circuits. So I would like to set the heat pump not to run below, say, 20 degrees and just use the aux. I would recommend to set a value for these thresholds first and that should eliminate the aux heat turning on sooner than needed.This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMP TO AUX DELTA. Rheem R-410A Heat Pump Troubleshooting c. Auxillary Heat Lockout (strip heat lockout) must be set to "35" or lower to meet PTCS specification PTCS Heat Pump Thermostat Support Sheet Upvote. When I did resi, it was not at all uncommon to find units rigged to bring 1st stage electric (5kw) on with the compressor in heat mode. The compressor lockout is to protect the refrigerant compressor from burning up due to short cycling. Trane Heat Pump ac compressor kicks in for about 3 minutes then stops. New comments cannot be posted and votes cannot be cast. For heatpump systems, its also crucial to know and set the minimum outdoor temperature that the heat pump can run with - otherwise the thermostat will lock out the heatpump and change over to aux heat as the weather outside will be too cold to run the heatpump unit that's sitting outside. And a variable speed compressor costs more than both. July 2018 edited July 2018 in A-C, Heat Pumps & Refrigeration. The other method is to disconnect the Aux control wire. How it affects price: A two-stage compressor will cost more than a single-stage compressor. Discussion on Google Nest products, including installation and configuration. It could also be the cycle rate on the heating. Heat pump running constantly. So needless to say, they have to be dependable. Compressor Stage 2 Temperature Delta: The minimum number of degrees from the desired temperature (set point) before engaging the second stage of the compressor. No matter what the weather is like outside, geothermal heat pumps deliver energy-efficient performance to give you the most comfortable indoor comfort for your home. Now I keep on getting alerts that the Aux heat is running. I'm leaning towards an ecobee, but happy to hear any ideas. A single-stage compressor offers just one speed: high. Heat Pump Repair Advice Advisory. The compressor has to start from a full stop to full blast in less than a second. Press question mark to learn the rest of the keyboard shortcuts. If your heat pump is constantly running, there are likely three main causes: Unusually cold weather: Heat pumps are designed to work much more gradually than a furnace. 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