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