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

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