I have a pretty standard forced air system, with gas for heating and standard a compressor for cooling. After I installed the stat I ran it through the modes to make sure it would function. 1 Recommended Answer 4 Replies 0 Upvotes I have a pretty standard forced air system, with gas for heating and standard a compressor for cooling. Normally this is caused by making a bunch of adjustments back-to-back. Electrical problems. Is this limited to testing only, or will the Nest prevent the cooling from running in operation mode as well? RULES for AOP - Owner Assistance and Contractors, The ARPA Zone/Open Membership Discussion Forums, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories – Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. Just an FYI, but the nest is a really poorly conceived device that catches a lot of folks with flashy advertising. 6 Indicates a malfunction with the system. Nothing could get the fan to turn in other than heat mode. Check if the Air wave option has been turned ON. Google takes abuse of its services very seriously. and your burning more electric...........Makes them happy! Which is just another one of the many reasons you should hire a nest professional installer.On average approximately 3-10 out of 100 people have existing issues with their furnace that has nothing to do with the nest thermostat or their existing thermostat for that mater that can create problems when you go to install a new thermostat. These are the common issues that cause AC compressor failure: Dirty coils. Heat pump compressor lockout temperature? Yes... we are 20 years old. The idea is that you have a control parameter(in our case temperature) and […] If you haven’t purchased a Nest thermostat, use the Compatibility Checker to tell if your system can work with a Nest thermostat. Some community members might have badges that indicate their identity or level of participation in a community. Check if the Air wave option has been turned ON. I stillhave the old stats so I could just re-install them. 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. Accordingly, what causes compressor lockout? I chatted with support, their response was: Dan A (Nest): Yes this is limited to testing only. Low refrigerant charge. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. As I installed a Thermostat E it would not allow me to test cooling (the compressor) because the outside temperature was below 60F. When I moved in, the heat pump compressor lockout (thermostat setting 0350) was set at 35 degrees. I just thought I'd get better HVAC management - guess not. The compressor is a kind of “refrigerator” that dehumidifies and cools your interior. I have a NEST thermostat and for some reason it is not turning on our air conditioner. This is set to 300 seconds (5 minutes) by default. If anybody else has experience this and can confirm, please post. https://support.google.com/googlenest/answer/9249790?hl=en. For Nest users who have migrated to a Google Account, the Nest Web APIs work only when the home.nest.com session stays active (you should not log off from your active session, but you can close the browser or turn off desktop/mobile ). By default, Nest will lock out the Setting compressor and auxiliary heater when the outdoor temperature is above 50°F but will not lock out auxiliary lockout temperatures the compressor at any temperature. If so, turning it OFF can do the trick. Community content may not be verified or up-to-date. Accessories – Pumps, Cooling Towers, Evap Condensers, etc, Components – Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. We appreciate your patience and understanding during this time. The second is the heat pump lock out temperature, when the location is below this temperature, it will not use the heat pump, and just use Aux. If you have a heat pump system, place it into the O/B terminal. Compressor Damage. This is set to 300 seconds (5 minutes) by default. This will remove the reply from the Answers section. The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Nest set to "Nest Sense" either "Balanced" or "Max Savings". But on the Nest Thermostat itself, the term "Lockout" is not used, instead you see " Use the heat pump compressor when the outdoor temperature is above ". ... For instance, you'll see the Nest Leaf to let you know that you've selected an energy-saving temperature. Before you call a professional, take a few minutes and follow a … I had Nest support go through this with me and he just went off "Nest Sense" and to manual system where I set the compressor lockout to 30F. No problems with heat or cool until this morning. “I haven’t failed. Show Printable Version; 02-02-2019, 04:25 PM #41. pecmsg. Beside above, can you drive with a locked up AC compressor? You can try the following link as a workaround and let me know if that works: Discard post? One is to use the “–index” argument. Your notifications are currently off and you won't receive subscription updates. The default is always use. If so, turning it OFF can do the trick. Last night I was awakened by what sounded like the compressor getting ready to explode. It seemed to work fine. There is a 10 degree dead zone between the aux lockout and compressor lockout. Nest Learning Thermostat 3rd gen. model is the only smart thermostat on the market right now that supports up to 3 stages of heating (the rest stop at 2). http://hvac-talk.com/vbb/showthread.php?t=1241, http://hvac-talk.com/vbb/showthread.php?t=116113. I’ve just found 10,000 ways that won’t work.” - Thomas Edison. Yes, I'm new to this and still evaluating. Why Nest thermostat is short cycling the AC The user interface provided by the Nest thermostat differs from the Nest website and iOS/Android apps. Too much refrigerant. 2 High Discharge Temperature Td >268F,Reset Td<250, Lockout on 5th 3 Compressor Protector Tripped Detect using current 4 Locked Rotor Lockout on 4th successive locked rotor trip 5 Demand Signal Loss Capacity Req < 0.5VDC, shut down 6 Discharge Thermistor Fault … Dan A (Nest): Yes, it will allow ti cool after skipping the test. The compressor timer lockout mav prevent the air conditioner from turning on, for a period of time: The display is blank: Lack of proper power: Make sure power is turned on to the furnace and that you have 24vac between R & W. If C is used, 24vac between R & C: The air conditioning does not attempt to turn on: The cooling setpoint is set too high We found the following personal information in your message: This information will be visible to anyone who visits or subscribes to notifications for this post. How do you unlock a Emerson thermostat? Inadequate oil lubricant. Me: So if the thermostat normally calls for cooling, it will turn to cool even if the outside temperature is low? Nest thermostats are usually compatible with whole home humidifier and dehumidifier systems that connect to your thermostat with one or two low-voltage wires. Connect your Nest Thermostats, Nest Cams, Nest Doorbell, or Nest devices and add Nest … Last summer I installed a customer supplied Nest thermostat. For example, if your AUX lockout temp is 40ºF or 4.4ºC, then AUX heat will come on when the outdoor temperature drops below 40ºF or 4.4ºC. I've had my Nest for 2 years now and generally it does what I want. To turn them on, go to. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Thread Tools. The nest itself switches to away mode when I tap the “Present” button, but the button does not toggle in the app, and pushing the button again does not switch the Nest back to home mode. If you don’t know your system type, place this wire into the W terminal. Thanks for sharing these details and I'm sorry to hear you've been experiencing issues with your Nest Thermostat. Yes, so far I'm disappointed with Nest as I thought it's "brain" would work out the best settings - but I will say that those compressor on and aux on settings are far more adjustable than my old Honeywell. Contaminants in the system. To your thermostat with one or two low-voltage wires is limited to testing only is on a split )! To do it this state to you only if we require additional details have... Sense '' either `` Balanced '' or `` Max Savings '' Flame displayed..., http: //hvac-talk.com/vbb/showthread.php? t=116113 wo n't receive subscription updates what like. 40 degrees then your compressor on and off is very bad, but seems set to 300 seconds 5... Run on very short cycles back to you only if we require details! 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