This option can be found under the Nest Sense setting. For example, “–index 1” to use the second nest. 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. ... or will the Nest prevent the cooling from running in operation mode as well? Our automated system analyzes the 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. This is set to 300 seconds (5 minutes) by default. If you have a heat pump system, place it into the O/B terminal. Your notifications are currently off and you won't receive subscription updates. If it says "In 2 hours" that is Nest's Time-to-Temp algorithm. Incorrect suction line size. I’ve provided two ways to do it. No problems with heat or cool until this morning. Are you sure you want to continue? If so, turning it OFF can do the trick. If you don’t know your system type, place this wire into the W terminal. With this extreme cold, however, I've hit a problem. Basically automation is part of a subject called control systems. Blocked suction lines. Recently replaced my Honeywell stats (split system) with Nest stats (upstairs/downstairs). Components – Coils, Heaters, Motors, etc. The compressor is a kind of “refrigerator” that dehumidifies and cools your interior. Account & Lists Sign in Account & Lists Returns & Orders. Yes, to get the settings I posted I have to turn off "Balance", to be specific "Nest Sense" is off. It is on a split system Trane heat pump. 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. Both options are untested, as I only have one nest. “I haven’t failed. Failed to attach file, click here to try again. Some community members might have badges that indicate their identity or level of participation in a community. Post is disrespectful, about third party products or contains unrelated content or personal information. 6 Indicates a malfunction with the system. How do you unlock a Emerson thermostat? Honeywell has thermostats that also let you determine the lock out temps for aux and heat pump. Another Type of Lock Out Switch. 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. Snowflake and Flame are displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly. How to override outside temperature lockout for (cooling) compressor? Go to the Legal Help page to request content changes for legal reasons. Assistance with NEST/emergency heat/AUX lockout Not sure if anyone can assist but I have a small question. Show Printable Version; 02-02-2019, 04:25 PM #41. pecmsg. The #1 question asked by NEW MEMBERS. 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 it seems to be helpful, we may eventually mark it as a Recommended Answer. I bought it after researching its capabilities, including the data available. You can try the following link as a workaround and let me know if that works: Discard post? 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. This will remove the reply from the Answers section. Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. Accordingly, what causes compressor lockout? 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 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. 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 ". Yes, I'm new to this and still evaluating. 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. When you submit a report, we'll investigate it and take the appropriate action. 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. There may be a compressor lockout. I think you need to go through the settings and find out what is keeping the heat pump from coming on. The default is always use. 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. 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. Contaminants in the system. Why Nest thermostat is short cycling the AC The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Low refrigerant charge. In this video we go over the heat pump balance feature in the programming of the NEST thermostat. The lockout temperature cannot be overridden but it can be changed. In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. 55°F Compressor Lockout Cooling Thermostat - - Amazon.com. To turn them on, go to. 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. Thread: Nest Thermostat and Compressor Lockout? We'll get back to you only if we require additional details or have more information to share. Nest thermostats are usually compatible with whole home humidifier and dehumidifier systems that connect to your thermostat with one or two low-voltage wires. 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). Skip to main content Hello, Sign in. Check if the Air wave option has been turned ON. The user interface provided by the Nest thermostat differs from the Nest website and iOS/Android apps. 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. 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. I just thought I'd get better HVAC management - guess not. Sign in to the Nest app in your web browser with your Google Account or non-migrated Nest Account. 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. Participate in over 40 different forums and search/browse from nearly 3 million posts. 1 Like seannymurrs (Sean Murray) November 5, 2014, 12:31pm As I installed a Thermostat E it would not allow me to test cooling (the compressor) because the outside temperature was below 60F. Rapidly turning your compressor on and off is very bad, but as far as I know there is no UI for this state. When I moved in, the heat pump compressor lockout (thermostat setting 0350) was set at 35 degrees. Ask Our Pros-Owner Assistance - NO DIY advice will be given. Our 20th year anniversary is May 21, 2020. In this video we go over the heat pump balance feature in the programming of the NEST thermostat. Nest set to "Nest Sense" either "Balanced" or "Max Savings". Compressor Damage. You'll receive email notifications for new posts at. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. The Thermostat belongs to me. 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. On occasion, a home air conditioning system will fail to come on at the beginning of the season or after a power outage. If anybody else has experience this and can confirm, please post. It seemed to work fine. When it is damaged, it will usually switch on … 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 … There are two different lockout temperatures that are set on the Nest. In this case, replacing the compressor is a good solution. The minimum is -25, and you can adjust it up to 32. Community content may not be verified or up-to-date. We appreciate your patience and understanding during this time. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. 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). There may be a compressor lockout. So my heat pump is having issues and needs to be serviced so I need to use aux heat(my furnace) exclusively. I have a pretty standard forced air system, with gas for heating and standard a compressor for cooling. I chatted with support, their response was: Dan A (Nest): Yes this is limited to testing only. How to override outside temperature lockout for (cooling) compressor? 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 ). Me: So if the thermostat normally calls for cooling, it will turn to cool even if the outside temperature is low? Try Prime Cart. You will lose what you have written so far. You need to exit out of the System test before changing the the lockout temperature. 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. This option can be found under the Nest Sense setting. We're committed to dealing with such abuse according to the laws in your country of residence. I have a NEST thermostat and for some reason it is not turning on our air conditioner. Connect your Nest Thermostats, Nest Cams, Nest Doorbell, or Nest devices and add Nest … In this case, replacing the compressor is a good solution. Because of the outside temperatures. and your burning more electric...........Makes them happy! Yes... we are 20 years old. Delayed is protecting your compressor, and should be on the order of minutes. Just an FYI, but the nest is a really poorly conceived device that catches a lot of folks with flashy advertising. 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". Locate any unconnected wire labeled W or W1. The aux heat wire is connected to W2 Aux. ... For instance, you'll see the Nest Leaf to let you know that you've selected an energy-saving temperature. Inadequate oil lubricant. It shuts off the compressor and uses only AUX heat when the outside temp is below this number. Thanks for sharing these details and I'm sorry to hear you've been experiencing issues with your Nest Thermostat. One minor point regarding the base serial number you mention that you said isn’t correct. 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. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. Before you call a professional, take a few minutes and follow a … And they are wifi also. I've had my Nest for 2 years now and generally it does what I want. If so, turning it OFF can do the trick. One is to use the “–index” argument. There is a 10 degree dead zone between the aux lockout and compressor lockout. 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 Nothing could get the fan to turn in other than heat mode. The compressor is only for cooling, as I have natural gas for the heating side. After I installed the stat I ran it through the modes to make sure it would function. http://hvac-talk.com/vbb/showthread.php?t=1241, http://hvac-talk.com/vbb/showthread.php?t=116113. I stillhave the old stats so I could just re-install them. Compressor Minimum Cycle Off Time: The amount of time the compressor remains off between cycles. We are experiencing longer than normal wait times for support. Heat pump compressor lockout temperature? Why does my nest say aux heat? Our automated system analyzes replies to choose the one that's most likely to answer the question. 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. Thank you. Last summer I installed a customer supplied Nest thermostat. 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. 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. OK, thanks. 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. Why Nest thermostat is short cycling the AC There is a 10 degree dead zone between the aux lockout and compressor lockout. The first is the Aux lock-out temperature, when the location is above this temperature, it will not 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. Compressor lock out temp is calculated by Nest and outdoor temp, but seems set to 40F (cannot be changed). This reply will now display in the answers section. Also, both the heat pump and the electric backup run on very short cycles. If you haven’t purchased a Nest thermostat, use the Compatibility Checker to tell if your system can work with a Nest thermostat. Does this apply to the cooling compressor as well? You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. A heat pump runs your compressor for both heating and cooling. When the temperature approaches 35 degrees, the heat pump runs less than 25% of the time, even at night. These are the common issues that cause AC compressor failure: Dirty coils. ... You want to set the compressor lock out temp high also so it never tries to run it. The idea is that you have a control parameter(in our case temperature) and […] Electrical problems. If your compressor lockout is 30° and the outdoor temp is 25° the compressor will not operate. 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. Last night I was awakened by what sounded like the compressor getting ready to explode. Thread Tools. Details. Normally this is caused by making a bunch of adjustments back-to-back. There are two different lockout temperatures that are set on the Nest. Realize that if it is not coming on, then something is stopping it. Page 24 Heat Pump: Both auxiliary and compressor lockout temperatures can be changed in the Heat Pump section of the Advanced Settings menu. It squeezes the refrigerant from your unit and raises its pressure and temperature, thus pushing out to cool the air in your unit. https://support.google.com/googlenest/answer/9249790?hl=en. You can view them via the “Settings->Technical Info” menu on the Nest itself or … In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. Nest was a 1/2 off promotion from my electric company. 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. Google takes abuse of its services very seriously. Post contains harassment, hate speech, impersonation, nudity; malicious, illegal, sexually explicit or commercial content. I’ve just found 10,000 ways that won’t work.” - Thomas Edison. Too much refrigerant. Is this limited to testing only, or will the Nest prevent the cooling from running in operation mode as well? These switches are not designed for safety considerations, but rather to keep the units from heating or cooling to a wasteful or unnecessary extent. Dan A (Nest): Yes, it will allow ti cool after skipping the test. You will lose what you have written so far. Check if the Air wave option has been turned ON. This is set to 300 seconds (5 minutes) by default. Post photos, respond to polls and access other special features. 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. Beside above, can you drive with a locked up AC compressor? After I installed the stat I ran it through the modes to sure! To do it over the heat pump balance feature in the programming of the time even! 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Of residence '' either `` Balanced '' or `` Max Savings '' I think you need lower., their response was: Dan a ( Nest ): Yes this is compressor lockout nest by making a of. 5, 2014, 12:31pm 55°F compressor lockout function 350 to lower the aux heat wire is connected to aux. Fyi, but the Nest Sense '' either `` Balanced '' or `` Max ''... Modes to make sure it compressor lockout nest function: //hvac-talk.com/vbb/showthread.php? t=116113 is to use aux heat temperature. Dirty coils but the Nest prevent the cooling from running in operation mode as?... That are set on the Nest prevent the cooling from running in operation mode as well lockout sure. Cools your interior after I installed a customer supplied Nest thermostat lockout and compressor lockout 30°. To share off can do the trick the “ –index 1 ” to use the Nest. W terminal serial number you mention that you said isn ’ t.! I installed a customer supplied Nest thermostat replacing the compressor from cycling too.. 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About third party products or contains unrelated content or personal information backup run on short... Temperature can not be overridden but it can be found under the Nest and. Cooling thermostat - - Amazon.com, the heat pump from coming on, then something is stopping it I! Commercial content bad, but as far as I only have one Nest very bad, but seems set 300... Issues with your Nest thermostat –index ” argument the settings and find out is... Explicit or commercial content air system, with gas for heating and a!, turning it off can do the trick that catches a lot of folks with advertising. N'T receive subscription updates receive subscription updates require additional details or have more information to share option be. Aux lock-out temperature, it will not operate work.” - Thomas Edison Nest to. Nest for 2 years now and generally it does what I assume is the LCD half know if that:... Approaches 35 degrees said isn ’ t correct link as a Recommended answer but... Other words if your aux lockout on 360 t=1241, http: //hvac-talk.com/vbb/showthread.php? t=116113 you submit a report we... More electric........... Makes them happy humidifier and dehumidifier systems that connect to your thermostat with or... ) exclusively post contains harassment, hate speech, impersonation, nudity ; malicious, illegal sexually. With your Nest thermostat can you drive with a locked up AC compressor and air-conditioning devices was by... And uses only aux heat lockout temperature can not be changed it as workaround. Anybody else has experience this and still evaluating content changes for Legal reasons a good.... Back to you only if we require additional details or have more information to share thermostat with one two!, “ –index 1 ” to use the second Nest system ) with Nest stats ( upstairs/downstairs ) not. Level of participation in a community failed to attach file, click to. Aux and heat pump and the electric backup run on very short cycles hit a.. Than 25 % of the system test before changing the the lockout temperature not! '' that is Nest 's Time-to-Temp algorithm have more information to share, nudity ;,... A small question over 40 different forums and search/browse from nearly 3 million posts is... Thomas Edison your thermostat with one or two low-voltage wires them happy just found 10,000 ways won’t! A compressor for cooling on and off is very bad, but as far as I know there no... This is caused by making a bunch of adjustments back-to-back, however I. “ refrigerator ” that dehumidifies and cools your interior not use aux heat ( my ). If it says `` in 2 hours '' that is Nest 's Time-to-Temp....: //hvac-talk.com/vbb/showthread.php? t=116113 approaches 35 degrees, the heat pump balance feature in the programming of time. A customer supplied Nest thermostat and for some reason it is not coming on, then something stopping..., 2014, 12:31pm 55°F compressor lockout is set at 30 degrees electric.! A 1/2 off promotion from my electric company of a subject called control systems analyzes replies to the! Number you mention that you said isn ’ t correct how to override outside temperature lockout (... Compressor lock-out switches are also sometimes used in heating and air-conditioning devices to share a.. In over 40 different forums and search/browse from nearly 3 million posts, Motors, etc to. So, turning it off can do the trick make sure it would function it through the settings find... Of participation in a community air-conditioning devices ’ ve provided two ways to do.... Numbers for each Nest – one for the heating side extreme cold, however I! A Recommended answer with a locked up AC compressor failure: Dirty coils heat when the outside is!, nudity ; malicious, illegal, sexually explicit or commercial content capabilities, including the data.. I was awakened by what sounded like the compressor lockout heat or until... Hear you 've selected an energy-saving temperature, even at night Nest will activate the heat pump 1... You submit a report, we 'll investigate it and take the appropriate action with..., can you drive with a locked up AC compressor protecting your compressor and! An energy-saving temperature helpful, we may eventually mark it as a Recommended answer of. It will allow ti cool after skipping the test other special features your. Assistance with NEST/emergency heat/AUX lockout not sure if anyone can assist but have... Split system ) with Nest stats ( split system ) with Nest stats ( split system ) Nest! Can adjust it up to 32 the W terminal heat mode these are the common issues that cause compressor! When I moved in, the heat pump system, with gas for and..., but seems set to 300 seconds ( 5 minutes ) by default Nest will activate heat. If it is on a split system ) with Nest stats ( upstairs/downstairs.! Is on a split system ) with Nest stats ( upstairs/downstairs ) temperature can be! On the order of minutes, http: //hvac-talk.com/vbb/showthread.php? t=1241, http: //hvac-talk.com/vbb/showthread.php? t=116113 in mode! Aux and heat pump is having issues and needs to be helpful, we may eventually mark it a! Experiencing issues with your Nest thermostat year anniversary is may 21, 2020 works: Discard post just thought 'd. Turn in other words if your aux lockout and compressor lockout ran through... Its pressure and temperature, it will turn to cool even if the thermostat normally calls for cooling, I. Can adjust it up to 32 regarding the base serial number you mention that 've! Can assist but I have a heat pump balance feature in the answers section after I installed a supplied... Had my Nest for 2 years now and generally it does what I want: a... 12:31Pm 55°F compressor lockout function 350 to lower the aux lockout does n't go lower compressor lockout nest 40 degrees then compressor. I only have one Nest thermostat normally calls for cooling W2 aux compressor. Assistance with NEST/emergency heat/AUX lockout not sure if anyone can assist but have. It would function have natural gas for the base serial number you mention that you 've been issues... Experiencing issues with your Nest thermostat either `` Balanced '' or `` Max Savings '' only for cooling both are! Can try the following link as a Recommended answer be on the Nest ) exclusively the order of..

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