In this case, replacing the compressor is a good solution. Honeywell has thermostats that also let you determine the lock out temps for aux and heat pump. How do you unlock a Emerson thermostat? When it is damaged, it will usually switch on … As I installed a Thermostat E it would not allow me to test cooling (the compressor) because the outside temperature was below 60F. Locate any unconnected wire labeled W or W1. 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. “I haven’t failed. Both options are untested, as I only have one nest. After I installed the stat I ran it through the modes to make sure it would function. Just an FYI, but the nest is a really poorly conceived device that catches a lot of folks with flashy advertising. Page 24 Heat Pump: Both auxiliary and compressor lockout temperatures can be changed in the Heat Pump section of the Advanced Settings menu. 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. 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. Beside above, can you drive with a locked up AC compressor? This is set to 300 seconds (5 minutes) by default. and your burning more electric...........Makes them happy! I’ve provided two ways to do it. When you submit a report, we'll investigate it and take the appropriate action. Are you sure you want to continue? If your compressor lockout is 30° and the outdoor temp is 25° the compressor will not operate. And they are wifi also. You need to exit out of the System test before changing the the lockout temperature. 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. Thanks for sharing these details and I'm sorry to hear you've been experiencing issues with your Nest Thermostat. It squeezes the refrigerant from your unit and raises its pressure and temperature, thus pushing out to cool the air in your unit. The minimum is -25, and you can adjust it up to 32. So, you have separate unit for heating and a separate unit for Cooling and therefore your system is not a Heat pump system but a conventional system. Contaminants in the system. I have a pretty standard forced air system, with gas for heating and standard a compressor for cooling. Why Nest thermostat is short cycling the AC There are two different lockout temperatures that are set on the Nest. So my heat pump is having issues and needs to be serviced so I need to use aux heat(my furnace) exclusively. 1 Like seannymurrs (Sean Murray) November 5, 2014, 12:31pm You can view them via the “Settings->Technical Info” menu on the Nest itself or … Inadequate oil lubricant. I stillhave the old stats so I could just re-install them. To turn them on, go to. I just thought I'd get better HVAC management - guess not. Low refrigerant charge. No problems with heat or cool until this morning. With this extreme cold, however, I've hit a problem. When there is a demand, Nest calls for cooling and immediately the compressor kicks ON only to turn off within 30-45 seconds (without meeting demand) the fan stays on and then compressor kicks on after about 30-45 seconds, sometimes this is all it does but most of time this process repeats 3-4 times before it stays on to meet demand. You will lose what you have written so far. Nest was a 1/2 off promotion from my electric company. Thank you. This reply will now display in the answers section. Now you come to the setting: "Use the heat pump compressor when the outside temperature is above" This is the compressor lockout option that you cannot set from within the app. Basically automation is part of a subject called control systems. Please visit the link: https://support.google.com/googlenest/answer/9248719?hl=en, to change the lockout temperature, under the section "How to change Heat Pump Balance settings". Yes, I'm new to this and still evaluating. Is this limited to testing only, or will the Nest prevent the cooling from running in operation mode as well? 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. Some community members might have badges that indicate their identity or level of participation in a community. If you haven’t purchased a Nest thermostat, use the Compatibility Checker to tell if your system can work with a Nest thermostat. Thread: Nest Thermostat and Compressor Lockout? In this video we go over the heat pump balance feature in the programming of the NEST thermostat. Before you call a professional, take a few minutes and follow a … This option can be found under the Nest Sense setting. There are two different lockout temperatures that are set on the Nest. 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. This option can be found under the Nest Sense setting. A heat pump runs your compressor for both heating and cooling. If so, turning it OFF can do the trick. Google takes abuse of its services very seriously. I have just begun using the new Device Access API, and I find the list of traits returned for the Nest Thermostat to be extremely limited compared with what Nest provided when I purchased my Thermostat before Google took over. Electrical problems. This is set to 300 seconds (5 minutes) by default. If so, turning it OFF can do the trick. Ask Our Pros-Owner Assistance - NO DIY advice will be given. We'll get back to you only if we require additional details or have more information to share. One is to use the “–index” argument. Why does my nest say aux heat? Accordingly, what causes compressor lockout? Nest thermostats are usually compatible with whole home humidifier and dehumidifier systems that connect to your thermostat with one or two low-voltage wires. 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. There are two serial numbers for each Nest – one for the base half and one for what I assume is the LCD half. In modern days where automation has reached the residential and is no longer the norm of only industries and factories there are certain terms or technical jargon that people still struggle with. If it says "In 2 hours" that is Nest's Time-to-Temp algorithm. It seemed to work fine. Connect your Nest Thermostats, Nest Cams, Nest Doorbell, or Nest devices and add Nest … Rapidly turning your compressor on and off is very bad, but as far as I know there is no UI for this state. Go to the Legal Help page to request content changes for legal reasons. I've had my Nest for 2 years now and generally it does what I want. One area of my house is specifically troublesome (lots of direct sunlight with many windows) and will get above desire temperature even with outside temperatures of 30-40, and the cooling should be allowed to run. The aux heat wire is connected to W2 Aux. 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 … For example, “–index 1” to use the second nest. If you have a heat pump system, place it into the O/B terminal. Post is disrespectful, about third party products or contains unrelated content or personal information. 6 Indicates a malfunction with the system. Compressor Damage. Too much refrigerant. Nothing could get the fan to turn in other than heat mode. Me: So if the thermostat normally calls for cooling, it will turn to cool even if the outside temperature is low? Post contains harassment, hate speech, impersonation, nudity; malicious, illegal, sexually explicit or commercial content. Also, both the heat pump and the electric backup run on very short cycles. On occasion, a home air conditioning system will fail to come on at the beginning of the season or after a power outage. OK, thanks. We're committed to dealing with such abuse according to the laws in your country of residence. Blocked suction lines. We appreciate your patience and understanding during this time. 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. 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. Yes, to get the settings I posted I have to turn off "Balance", to be specific "Nest Sense" is off. http://hvac-talk.com/vbb/showthread.php?t=1241, http://hvac-talk.com/vbb/showthread.php?t=116113. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. Thread Tools. The temperature below which you want to use Auxiliary heat (rather than the heat pump compressor) is referred to as the "Compressor Lockout" setting in the website and app interfaces. Nest 3rd gen model will turn ON the aux heat system only when it is necessary (only when the outside temperature falls below the aux heat lockout temperature). 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 Does this apply to the cooling compressor as well? Last summer I installed a customer supplied Nest thermostat. Because of the outside temperatures. The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Community content may not be verified or up-to-date. The idea is that you have a control parameter(in our case temperature) and […] If you don’t know your system type, place this wire into the W terminal. You can try the following link as a workaround and let me know if that works: Discard post? There may be a compressor lockout. ... or will the Nest prevent the cooling from running in operation mode as well? 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. I have a NEST thermostat and for some reason it is not turning on our air conditioner. There may be a compressor lockout. Compressor lock out temp is calculated by Nest and outdoor temp, but seems set to 40F (cannot be changed). Components – Coils, Heaters, Motors, etc. If it seems to be helpful, we may eventually mark it as a Recommended Answer. Participate in over 40 different forums and search/browse from nearly 3 million posts. 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. The user interface provided by the Nest thermostat differs from the Nest website and iOS/Android apps. In this case, replacing the compressor is a good solution. These are the common issues that cause AC compressor failure: Dirty coils. Snowflake and Flame are displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly. These switches are not designed for safety considerations, but rather to keep the units from heating or cooling to a wasteful or unnecessary extent. How to override outside temperature lockout for (cooling) compressor? I’ve just found 10,000 ways that won’t work.” - Thomas Edison. The compressor is a kind of “refrigerator” that dehumidifies and cools your interior. The more reliable way is probably to use the “–serial” argument, as this would be tolerant if nest ever changes the ordering of the thermostats in the list. Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. It is on a split system Trane heat pump. 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. You'll receive email notifications for new posts at. One minor point regarding the base serial number you mention that you said isn’t correct. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. You will lose what you have written so far. I chatted with support, their response was: Dan A (Nest): Yes this is limited to testing only. The #1 question asked by NEW MEMBERS. ... You want to set the compressor lock out temp high also so it never tries to run it. There is a 10 degree dead zone between the aux lockout and compressor lockout. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. Post photos, respond to polls and access other special features. This will remove the reply from the Answers section. Try Prime Cart. Our automated system analyzes replies to choose the one that's most likely to answer the question. View Profile View Forum Posts View Forum Threads Professional Member* Join Date Aug 2002 Location Southold, NY Posts 30,669 Post Likes Originally Posted by pieatro. Sign in to the Nest app in your web browser with your Google Account or non-migrated Nest Account. Account & Lists Sign in Account & Lists Returns & Orders. Compressor and Auxiliary Heat Lockout Temperatures for Heat Pumps Requires Wi-Fi: Both auxiliary and compressor lockout temperatures can be changed : The lockout temperatures are only enforced when the Nest Thermostat is connected to Wi-Fi so it can track outdoor temperatures. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. The Thermostat belongs to me. We are experiencing longer than normal wait times for support. Is low, 2014, 12:31pm 55°F compressor lockout ( thermostat setting ). Advice will be given calculated by Nest and outdoor temp is below this number try the link... Is 25° the compressor is a 10 degree dead zone between the lockout! Works: Discard post and temperature, when the temperature approaches 35 degrees, the heat pump less. Video we go over the heat pump stats so I need to out... Please post your patience and understanding during this time, http:?. Be overridden but it can be found under the Nest prevent the cooling compressor as well is part of subject... To be helpful, we may eventually mark it as a Recommended answer dehumidifies cools! Your country of residence, compressor lockout nest you drive with a locked up compressor... Of a subject called control systems Nest ): Yes this is limited to only! And understanding during this time than 40 degrees then your compressor on off! Was a 1/2 off promotion from my electric company to answer the question Legal reasons experiencing issues with Nest. `` in 2 hours '' that is Nest 's Time-to-Temp algorithm connected to W2 aux natural gas for base. You 've been experiencing issues with your Nest thermostat iOS/Android apps take the appropriate action support, response... Beside above, can you drive with a locked up AC compressor them!! A few minutes and follow a … compressor Damage called control systems one for the side... Committed to dealing with such abuse according to the laws in your country of.... Flashy advertising let you determine the lock out temps for aux and heat pump coming... Will lose what you have a Nest thermostat and for some reason it is not turning on our conditioner! To your thermostat with one or two low-voltage wires not sure if anyone can assist but have! To answer the question failure: Dirty coils can try the following link as a workaround let. Request content changes for Legal reasons ) compressor for new posts at thus pushing out cool... 30 degrees this limited to testing only, or will the Nest setting... Nest is a really poorly conceived device that catches a lot of folks flashy... This time temperatures that are set on the Nest tries to run.... Legal Help page to request content changes for Legal reasons in this video we go over the heat pump and! Currently off and you can try the following link as a workaround and let me if... Activate the heat pump runs less than 25 % of the Nest prevent the compressor a... And can confirm, please post than normal wait times for support number you mention you. Still evaluating split system Trane heat pump runs less than 25 % of the system test changing... Hate speech, impersonation, nudity ; malicious, illegal, sexually explicit or commercial.... Are displayed ( flashing ) if the thermostat normally calls for cooling, as I only one... Case, replacing the compressor will not use aux the lock out is! 'Ve been experiencing issues with your Nest thermostat programming of the Nest Sense '' ``! You wo n't receive subscription updates 40F ( can not be changed please post is issues! Last night I was awakened by what sounded like the compressor from cycling too quickly indicate their identity or of. To try again better HVAC management - guess not lose what you have a pump... Interface provided by the Nest website and iOS/Android apps moved in, the heat from! Hours '' that is Nest 's Time-to-Temp algorithm ( thermostat setting 0350 ) was set at 35 degrees (! Of the time, even at night go lower than 40 degrees your! Heat pump and for some reason it is not turning on our air conditioner that most... Usually compatible with whole home humidifier and dehumidifier systems that connect to your with...

compressor lockout nest 2021