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. I've had my Nest for 2 years now and generally it does what I want. Your heat pump should still put out some heat even when temps outside are below zero, not much though. It's set now, thanks again. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Sometimes, the sound of the outdoor unit fan or compressor relay can be transmitted in a way that makes it … Designed for long lasting performance, the Climatuff has been New comments cannot be posted and votes cannot be cast. Discussion on Google Nest products, including installation and configuration. No 1. Press J to jump to the feed. Rheem R-410A Heat Pump Troubleshooting 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. And his was a heat pump as far as I know it's still running. Heat Pump Split System and AY28X084 Evaporator Defrost Control Thermostat Air handling unit Heat pump Thermostat unit Air handling unit Cooling unit Warning! update I ran the system in cool mode and dropped the house temp 2 degrees and the compressor never locked out. I've had my Nest for 2 years now and generally it does what I want. Heat pump running constantly. 4 factors that affect the price of a heat pump compressor Factor #1: Single-stage vs. two stage vs. variable speed compressors. 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". 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. 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. To also avoid short cycling and increase equipment efficiency, you can go to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > HEAT DIFFERENTIAL TEMP > and change this to a higher value so that the system turns on for a bigger temperature drop and reduces short cycling. Compressor Stage 2 Temperature Delta: The minimum number of degrees from the desired temperature (set point) before engaging the second stage of the compressor. Jon Held_2 Member Posts: 21. And if not, what's my best alternative? 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 … My compressor lockout / balance point is at 30° and the Backup heat lockout is set to off. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. 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? A single-stage compressor offers just one speed: high. 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 these cases you can manually enter a higher differential to avoid the auxiliary heat coming on for a certain time or temperature difference (it is up to you what value you would like to keep it at). However, you can disable the furnace by changing the System Type in the installer menu to one without Aux heat. 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. 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. Yes, I'm talking Fahrenheit. 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. In this option, please select what you find best fits for you. Set compressor lock out to 30, or lower, to see at what temp the heat pump really can't handle the load. What could be the problem? Is a Password Requried? To save you time, money and frustration, the experts at Carrier have put together a quick heat pump troubleshooting guide. But most dual fuel compatible thermostats (those that don't require a dual fuel kit) cannot be programmed to lock out the furnace. Now I keep on getting alerts that the Aux heat is running. Fault code states "soft lock out" on both the compressor and condenser.. c. Auxillary Heat Lockout (strip heat lockout) must be set to "35" or lower to meet PTCS specification PTCS Heat Pump Thermostat Support Sheet If you're not talking F, I'm not sure how the water is freezing. Upvote. A service tech should be able to set it down to a lower setting no problem. Heat pump problems can be frustrating (and expensive). Should have pin settings for compressor lockout. So needless to say, they have to be dependable. PTCS Heat Pump Thermostat Support Sheet Manufacturer: Honeywell Thermostat Models: T6 Pro TH6320U2008, TH6220U2000, TH6210U2001 Page 1 of 2. My understanding is that heat pumps of SEER 15 can be more energy efficient than resistive heat down to about 20 degrees F or so, so that's what I was thinking about setting it to. 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. This can be done by going to MENU > SETTINGS > INSTALLATION SETTINGS > THRESHOLDS > COMPRESSOR MIN OUTDOOR TEMP. Trane Heat Pump ac compressor kicks in for about 3 minutes then stops. Get in touch with our support team. How it affects price: A two-stage compressor will cost more than a single-stage compressor. I posted about this exact thing 2 weeks ago: https://www.reddit.com/r/Nest/comments/7mizg2/force_aux_heat/. 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. Below we list a dozen causes of high head pressure in an air conditioner or heat pump compressor motor. With this extreme cold, however, I've hit a problem. 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. When you read information on the web double check that the information is correct. Heat Pump Repair Advice Advisory. Heat pump compressor lockout temperature? I have seen maybe 3 of those units and one oy my customers elected for the replacement compressor. When heat pump is operating in defrost mode, ice will thaw from around outdoor coil and water will flow from the unit. Monday, February 15(Ontario Family Day)9 a.m. to 9 p.m. EST. There is a 10 degree dead zone between the aux lockout and compressor lockout. Not surprising everybody hates heat pumps in this area, the electric bills have got to be insane. The information given below can be helpful for you then. The Climatuff ® compressor you’ll find at the heart of every Trane XR heat pump is a marvel of reliability, known throughout the industry for providing years of trouble-free comfort. The other method is to disconnect the Aux control wire. I finally got to change that setting - that's the one I had asked Nest support about, and they hadn't explained that once you click on the "Always" you can select a temperature. Carrier Infinity thermal lockout low/high stage. Assure high voltage power is disconnected using lockout / tag-out procedures if applicable prior to connecting low voltage wiring. We have been getting down to 6 degrees F with snow recently, which is when the problem manifested. The compressor lockout is to protect the refrigerant compressor from burning up due to short cycling. Caution, entering installer set -up mode may result in altering settings Do not press the + or buttons when in the installer set– -up (ISU) or settings will be altered . An air conditioner or heat pump compressor pulls a high amp draw on startup, which is technically called locked rotor amps. This is set at a default 35F (1.7C), so the heatpump will not be used when the weather outside is below 35 degrees … 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. the compressor lockout is set at. Then raise to temp it can handle the load. High voltage present in the outdoor unit and indoor unit. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. In the lockout mode, the compressor will not operate, the alarm output is energized and the red LED will blink to indicate which fault has occurred. 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. 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. 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. We have a heat pump and recently installed an ecobee thermostat. Learn how to diagnose common issues before calling in backup. In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. It could also be the cycle rate on the heating. 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. Clicking noise heard inside. My question is, is there a way around this to actually set the lockout temperature? You can run a heat pump below 32 degrees with no problem it just looses effiency the colder it gets. Hi. However, my system has a pretty long exposed condensate drain which is just freezing solid, after which I get water dripping out of my air handler and pooling on the floor. Be sure the compressor lock-out function is disabled. Will flow from the unit to the outdoor unit and may have compressor cut out on the double. Pump is operating in defrost mode, ice will thaw from around outdoor coil and water will from... It just looses effiency the colder it gets able to set it down to degrees! Degrees with no problem it just looses effiency the colder it gets cool over,. 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