If so, turning it OFF can do the trick. There are two different lockout temperatures that are set on the Nest. Our automated system analyzes replies to choose the one that's most likely to answer the question. When it is damaged, it will usually switch on … Thanks for sharing these details and I'm sorry to hear you've been experiencing issues with your Nest Thermostat. Post contains harassment, hate speech, impersonation, nudity; malicious, illegal, sexually explicit or commercial content. Last summer I installed a customer supplied Nest thermostat. Does this apply to the cooling compressor as well? It shuts off the compressor and uses only AUX heat when the outside temp is below this number. We are experiencing longer than normal wait times for support. The idea is that you have a control parameter(in our case temperature) and […] You'll receive email notifications for new posts at. How do you unlock a Emerson thermostat? Normally this is caused by making a bunch of adjustments back-to-back. If you haven’t purchased a Nest thermostat, use the Compatibility Checker to tell if your system can work with a Nest thermostat. Some community members might have badges that indicate their identity or level of participation in a community. By default, Nest will lock out the Setting compressor and auxiliary heater when the outdoor temperature is above 50°F but will not lock out auxiliary lockout temperatures the compressor at any temperature. If so, turning it OFF can do the trick. 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 20th year anniversary is May 21, 2020. You will lose what you have written so far. Our automated system analyzes the replies to choose the one that's most likely to answer the question. Post photos, respond to polls and access other special features. Incorrect suction line size. Why Nest thermostat is short cycling the AC Also, both the heat pump and the electric backup run on very short cycles. OK, thanks. It squeezes the refrigerant from your unit and raises its pressure and temperature, thus pushing out to cool the air in your unit. In this video we go over the heat pump balance feature in the programming of the NEST thermostat. I have a NEST thermostat and for some reason it is not turning on our air conditioner. Accordingly, what causes compressor lockout? I stillhave the old stats so I could just re-install them. One minor point regarding the base serial number you mention that you said isn’t correct. 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Why Nest thermostat is short cycling the AC Thank you. http://hvac-talk.com/vbb/showthread.php?t=1241, http://hvac-talk.com/vbb/showthread.php?t=116113. 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. How to override outside temperature lockout for (cooling) compressor? Is this limited to testing only, or will the Nest prevent the cooling from running in operation mode as well? Contaminants in the system. It seemed to work fine. 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 In other words if your aux lockout doesn't go lower than 40 degrees then your compressor lockout is set at 30 degrees. Nest set to "Nest Sense" either "Balanced" or "Max Savings". 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. Compressor lock-out switches are also sometimes used in heating and air-conditioning devices. 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. The default is always use. 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. 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. I bought it after researching its capabilities, including the data available. By default Nest will activate the heat pump balance, which then automatically determines the aux heat lockout temperature. 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. It is on a split system Trane heat pump. ... or will the Nest prevent the cooling from running in operation mode as well? 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. Page 24 Heat Pump: Both auxiliary and compressor lockout temperatures can be changed in the Heat Pump section of the Advanced Settings menu. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. 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). With this extreme cold, however, I've hit a problem. 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. Blocked suction lines. These are the common issues that cause AC compressor failure: Dirty coils. We're committed to dealing with such abuse according to the laws in your country of residence. 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. The compressor is a kind of “refrigerator” that dehumidifies and cools your interior. The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Honeywell has thermostats that also let you determine the lock out temps for aux and heat pump. and your burning more electric...........Makes them happy! We'll get back to you only if we require additional details or have more information to share. In this case, replacing the compressor is a good solution. You need to exit out of the System test before changing the the lockout temperature. I havent failed. These switches are not designed for safety considerations, but rather to keep the units from heating or cooling to a wasteful or unnecessary extent. 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 may be a compressor lockout. Realize that if it is not coming on, then something is stopping it. To turn them on, go to. The compressor is only for cooling, as I have natural gas for the heating side. Yes, to get the settings I posted I have to turn off "Balance", to be specific "Nest Sense" is off. 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. 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. I think you need to go through the settings and find out what is keeping the heat pump from coming on. 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. Compressor Minimum Cycle Off Time: The amount of time the compressor remains off between cycles. If your compressor lockout is 30° and the outdoor temp is 25° the compressor will not operate. Details. Try Prime Cart. And they are wifi also. This is set to 300 seconds (5 minutes) by default. Post is disrespectful, about third party products or contains unrelated content or personal information. As I installed a Thermostat E it would not allow me to test cooling (the compressor) because the outside temperature was below 60F. Check if the Air wave option has been turned ON. Last night I was awakened by what sounded like the compressor getting ready to explode. 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. There is a 10 degree dead zone between the aux lockout and compressor lockout. One is to use the “–index” argument. If you don’t know your system type, place this wire into the W terminal. Low refrigerant charge. 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. I’ve provided two ways to do it. Recently replaced my Honeywell stats (split system) with Nest stats (upstairs/downstairs). Your notifications are currently off and you won't receive subscription updates. You can view them via the “Settings->Technical Info” menu on the Nest itself or … Nothing could get the fan to turn in other than heat mode. Show Printable Version; 02-02-2019, 04:25 PM #41. pecmsg. The minimum is -25, and you can adjust it up to 32. There may be a compressor lockout. 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 ). This is set to 300 seconds (5 minutes) by default. You will need to lower the compressor lockout function 350 to lower the aux lockout on 360. 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. 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. Both options are untested, as I only have one nest. 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. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. 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... we are 20 years old. ... You want to set the compressor lock out temp high also so it never tries to run it. https://support.google.com/googlenest/answer/9249790?hl=en. Skip to main content Hello, Sign in. If anybody else has experience this and can confirm, please post. Locate any unconnected wire labeled W or W1. You can try the following link as a workaround and let me know if that works: Discard post? Before you call a professional, take a few minutes and follow a … Google takes abuse of its services very seriously. Nest was a 1/2 off promotion from my electric company. This will remove the reply from the Answers section. 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. The Thermostat belongs to me. 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. If you have a heat pump system, place it into the O/B terminal. 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. 1 Like seannymurrs (Sean Murray) November 5, 2014, 12:31pm This option can be found under the Nest Sense setting. Just an FYI, but the nest is a really poorly conceived device that catches a lot of folks with flashy advertising. 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). Nest thermostats are usually compatible with whole home humidifier and dehumidifier systems that connect to your thermostat with one or two low-voltage wires. Me: So if the thermostat normally calls for cooling, it will turn to cool even if the outside temperature is low? Rapidly turning your compressor on and off is very bad, but as far as I know there is no UI for this state. I've had my Nest for 2 years now and generally it does what I want. 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. 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". For example, “–index 1” to use the second nest. 6 Indicates a malfunction with the system. Snowflake and Flame are displayed (flashing) if the thermostat is in lockout mode to prevent the compressor from cycling too quickly. When I moved in, the heat pump compressor lockout (thermostat setting 0350) was set at 35 degrees. Are you sure you want to continue? Ive just found 10,000 ways that wont work. - Thomas Edison. After I installed the stat I ran it through the modes to make sure it would function. The first is the Aux lock-out temperature, when the location is above this temperature, it will not use Aux. Sign in to the Nest app in your web browser with your Google Account or non-migrated Nest Account. There are two different lockout temperatures that are set on the Nest. There are two serial numbers for each Nest – one for the base half and one for what I assume is the LCD half. In this video we go over the heat pump balance feature in the programming of the NEST thermostat. 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 … Basically automation is part of a subject called control systems. Beside above, can you drive with a locked up AC compressor? If it seems to be helpful, we may eventually mark it as a Recommended Answer. Connect your Nest Thermostats, Nest Cams, Nest Doorbell, or Nest devices and add Nest … In this case, replacing the compressor is a good solution. Ask Our Pros-Owner Assistance - NO DIY advice will be given. The lockout temperature cannot be overridden but it can be changed. Go to the Legal Help page to request content changes for legal reasons. The user interface provided by the Nest thermostat differs from the Nest website and iOS/Android apps. Failed to attach file, click here to try again. Community content may not be verified or up-to-date. Electrical problems. Thread: Nest Thermostat and Compressor Lockout? This option can be found under the Nest Sense setting. Yes, I'm new to this and still evaluating. Components Coils, Heaters, Motors, etc. Thread Tools. I have a pretty standard forced air system, with gas for heating and standard a compressor for cooling. Dan A (Nest): Yes, it will allow ti cool after skipping the test. No problems with heat or cool until this morning. Too much refrigerant. Check if the Air wave option has been turned ON. Why does my nest say aux heat? So my heat pump is having issues and needs to be serviced so I need to use aux heat(my furnace) exclusively. 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. We appreciate your patience and understanding during this time. Account & Lists Sign in Account & Lists Returns & Orders. Compressor Damage. How to override outside temperature lockout for (cooling) compressor? 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 is a 10 degree dead zone between the aux lockout and compressor lockout. The #1 question asked by NEW MEMBERS. When you submit a report, we'll investigate it and take the appropriate action. When the temperature approaches 35 degrees, the heat pump runs less than 25% of the time, even at night. Because of the outside temperatures. You will lose what you have written so far. Inadequate oil lubricant. Participate in over 40 different forums and search/browse from nearly 3 million posts. ... For instance, you'll see the Nest Leaf to let you know that you've selected an energy-saving temperature. On occasion, a home air conditioning system will fail to come on at the beginning of the season or after a power outage. A heat pump runs your compressor for both heating and cooling. Heat pump compressor lockout temperature? 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. Another Type of Lock Out Switch. I chatted with support, their response was: Dan A (Nest): Yes this is limited to testing only. Delayed is protecting your compressor, and should be on the order of minutes. If it says "In 2 hours" that is Nest's Time-to-Temp algorithm. The aux heat wire is connected to W2 Aux. I just thought I'd get better HVAC management - guess not. 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