There are different intervals to choose from and you can have it on for up to 12 hours straight. 11 years ago. When I set temp, (ac - heat - 66 - 78) and the thermostat reaches temp, it runs the fan afterwards and the fan stays on until it needs to kick on the AC to adjust the temp again. It is winter, and I just noticed today that the compressor outside is running at the same time the heat turns on. We live in NJ, so winters are cold and summers are hot. Max Savings This is the setting you need if you want to minimize the use of AUX heat but without turning it off completely. Sounds wacky, but consider these situations: 1. ‹ Floors, floors, floors! Press J to jump to the feed. I've turned off all the settings and checked the connections. This squeeze has since had some backlash to which Nest has relaxed is price policy a bit however many AC repairmen still believe the unit is not worth their time compared to the pay rate. i have lots of experience and now what im talking about. This will remove the reply from the Answers section. Very basic. From here, you can get quick access to the fan timer and set it for a specific amount of time to be on. No problems. Big-Box Retail Stores Thanks! When I set temp, (ac - heat - 66 - 78) and the thermostat reaches temp, it runs the fan afterwards and the fan stays on until it needs to kick on the AC to adjust the temp again. Open up the Nest app on your phone and select your Nest Thermostat on the main screen. At the bottom, tap on “Fan”. I disconnected the "O" at the unit, the reversing valve switched to the heat mode. Run it from the A/C air handler. dysfunktion. Post contains harassment, hate speech, impersonation, nudity; malicious, illegal, sexually explicit or commercial content. The batteries to power thermostats are standard batteries that you can buy at most stores. Thanks for reaching out. Now I’m up and running with two Nest thermostats for upstairs and downstairs. In the RV there are 2 blowers: one for the furnace and the other for the A/C. AC is running fine, freon, etc, all good to go. Are you sure you want to continue? Anyone have any thoughts as to why both come on at the same time? Sign in to ask the community. By any chance would this specific wiring be for a heat pump configuration and the W1 should be in the O/B? Let's say when it temp drops to 65 then heater is turning on and  then turn off at 67, but fan is still running and reaching temperature to 79 then AC is automatically turning on to get the temperature back to 78/77 then the entire system is calming down finally. If you have a gas furnace, and it was in fact running (flames coming out of the burners) at the same time your air conditioner was running, then call a HVAC repair guy. I installe… I was just wondering if this is the way it’s supposed to be set up to save energy, or if it’s supposed to shut off after reaching temp? So we run our A/C pretty much throughout the whole year. Community content may not be verified or up-to-date. We’ve had a Nest for 6 years installed just like this. The Nest relies on the AC running to charge. We're committed to dealing with such abuse according to the laws in your country of residence. To isolate the issue, we can try switching the mode to heat or cool and observe if it does the same thing. I have an older furnace and central air unit. Tried changing all settings but no luck. The AC kicks on and starts blowing cold air, and about 2 min later the furnace ignites … 03-28-2012, 08:25 AM They fixed that also. Same thing is happening to me also. Your Nest thermostat uses the voltage from your system’s wires to keep its internal battery charged. This fixed my issue and all is good now. Find community discussions. Still happens. Offline . I have a ComfortMaker gas furnace and air conditioner. A Week ago Nest sw updates occurred, with these updates came a … Google takes abuse of its services very seriously. The AC does remove some heat. Therefore, you may end up running your AC even more, to counterbalance the extra heat. Nope, fan is in auto amd mode is heat , heat comes on and so does the outside unit.not a heat pump , also i am getting 22 v at C and Y …at C and W i am getting 24.7v … it should be a bad tstat..but when i jump off at board with tstat in off mode.Y to C , heat also comes on with out side unit. Nest . If so, there may be a power issue. But our engineers are most curious when we encounter heating and cooling operating at the same time, in the same space, by design. Close. So why the heck is your AC running? But if you’d rather program specific temperatures for specific times, here’s how to set a schedule on your Nest. Anybody out there can tell me that the NEST can run forced-air and radiant at the same time? Nest Heating & Cooling Thermostat Installation & wiring: Detailed photographs and text describe how to how to install, set, troubleshoot & repair a Nest Learning Thermostat, beginning with removing the old wall thermostat, labeling its wires, preparing the wall for the new thermostat, then installing the Nest Thermostat and getting it working nicely. For instance, you may notice your system is always on, it won’t turn on, it turns off and on repeatedly, or it makes strange noises. Next I checked on the furnace, it was also running. The removed moisture clears your windows quickly. New comments cannot be posted and votes cannot be cast. Troubleshoot strange heating or cooling behavior . Contractor's Assistant: How long has this been going on with your Lennox air conditioner? Please advise! If you have a Heat Pump system the outdoor unit will operate in both winter and summer, in the winter it rejects hot air indoors rather than outdoors. Your Nest Thermostat can learn your preferences over time and automatically adjust the temperature accordingly. Search Search Close. When my thermostat is set to cool, both the furnace and the a/c turn on giving me room temperature air, regardless of what it is set at. Not good to run that in the winter. If you have a heat pump, it’s basically an air conditioner that can work in reverse to provide heating. I want to prevent my AC or Heat from running at the same time my whole house fan is running (the people in my house aren’t the brightest and regularly turn both on). No matter how cool the house has gotten, it will warm up at the same rate." Therefore, the AC should always be on in most cars (even in the winter). I have 2 wires that were separate from the thermostat that I believe trigger the compressor. Is it okay or useful to run heat and AC at the same time? I'm going back there in about 5 hours. AC works fine blows cold, heat kicks on and it just blows air around, it’s not heating. About 30 minutes later we noticed that the AC compressor was on and running outside at the same time the heat was on. Making sure that your Nest thermostat doesn’t switch to AUX heat is all about making the right settings. I' Now, to be fair, I don't live in a household where I expected to see drastic changes. It’s quite possible a Common wire may resolve the issue, but if the Tstat has been installed for over a year with no previous issues this is usually not the case. Without the AC on, the heating system will put more heat out the heater vents. If it seems to be helpful, we may eventually mark it as a Recommended Answer. Posted by 2 years ago. I just turned the A/C on for the first time this year and I noticed that my house was not cooling. We had an ac/heat guy out there to look for problems.. he missed the boat. Discard post? Like another answer said, it should dehumidify. Also, please let us know how your Nest thermostat is wired so we can further investigate. I arrive to find the outdoor unit running, vapor line covered in frost. ECOBee3 AC running same time as Heat. It gathers information about indoor temperature, relative humidity, air conditioner runtime, auxiliary heat operation for heat pumps, and much more. For starters, my wife and son are home during the day, so there's no set period where the house is always empty and the HVAC can be turned off completely. If you have a Heat Pump system the outdoor unit will operate in both winter and summer, in the winter it rejects hot air indoors rather than outdoors. What could be causing this? The central air has worked without any probelms all summer. Or anything else about the NEST unit that I should know? Keep The Nest thermostat could never catch up and the AC was always running! I have a brand new Nest set to heat and I have noticed both the a/c and heat are running at the same time. Anyone have any thoughts as to why both come on at the same time? Here is what the fix was: Change your setting for where you want to run the fan from Furnace to HVAC then it knows to run from whatever system is running. In addition, one of the Nest options was set incorrectly, which forced my AC and heater to turn on at the same time even though I wanted only heat. Although the air temperature will be similar to the space temperature, your house will feel cold. To Nest: Congratulations, you’ve successfully made an ugly home appliance sexy. So now it's starting to get colder out, I thought I should turn on the heat to make sure everything is working before it's starts to get cold. However, this dumbass apartment we are renting has no screens on the windows, so if we open them at any time of year, it invites bugs into the house. So you’ve turned on your heat and everything is running smoothly. Furnace is running a/c and heat at same time. Then recently, Nest support suggests the unit is bad and we end up buying another one. The heat comes from your cabin air. When did you last replace the air filter? Oil furnace. Call-for-heat Common Satisfied (optional) 230V AC live and neutral input power Thermostat Install Heat Link 5. So why the heck is your AC running? They fixed that also. very strange.. With the Honeywell thermostat, not only does the temp stay constant in the house, but the AC doesn’t have issues, the thermostat keeps up and the AC turns off more frequently since the … Secondly, our previous thermostat was also a schedulable one, albeit a very difficult to set/use variety, so we had some existing saving built-in. New thermostat running heat & ac at same time. Once the target temperature has been reached, the fan should also stop running, unless you have the fan scheduled to always run. Same issue. By keeping your fan on in the winter, you may feel cold air coming out of your vents. Ugh. Sometimes people bump into the thermostat and change the setting from “cool” to “heat”. (G,Y,W,Rh jumped with Rc) Oh yeah, and the … Loading. Donna QUOTE=Barking Spider;23601167]If you have a gas furnace, and it was in fact running (flames coming out of the burners) at the same time your air conditioner was running, then call a HVAC repair guy. From here, you can get quick access to the fan timer and set it for a specific amount of time to be on. Now I’m up and running with two Nest thermostats for upstairs and downstairs. Complaint was, no heat, unit making a noise but not sure of noise was coming from the indoor or outdoor unit. We are experiencing longer than normal wait times for support. Big-Box Retail Stores Electric AC. I have replaced my thermostat earlier this spring. the colder it gets the less efficient it get but never goes below 1:1. it you are straight electric it should run no matter how cold it is. 11 years ago. Also happens when I turn the unit to Heat, the Air Conditioner blows at the same time. Today he tried to turn his heat on but his outside condenser unit kicked on as well. nest thermostat’s issue with furnace & air conditioning technicians. This thread is archived. My ac and Furnace run at the same time. End of Search Dialog. We appreciate your patience and understanding during this time. hide. Hello Select your address Summer hobby inspiration. Heat is absorbed at the inside evaporator coil in the summer, and then it’s released outdoors at the condenser coil. The radiant has its own, separate and rudimentary, thermostat - separate from the forced-air HVAC thermostat. We'll get back to you only if we require additional details or have more information to share. For Sale 2 Pendant Lights NEW 7112WH Kichler Eichler Style › Top. Our automated system analyzes replies to choose the one that's most likely to answer the question. report. Same thing is happening to me also. A heat pump can have at most one auxiliary heat wire. Please see my equipment image. So I checked on the A/C and it was running. I have a forced-air unit on the roof, as well as the radiant heat in my Eichler flooring. If it's on Auto, when the heat or the A/C comes on, the blower comes on. View This Post Yes, it is useful, okay and won't cause any damage. Like another answer said, it should dehumidify. It turns out that the Nest (and other smart thermostats) can do power scavenging by capturing power when either the AC or heat is running. save. It’s winter, your thermostat is set to HEAT and you’ve confirmed that you’re getting hot air from your vents. In the heat and cold mode I set my temperatures 66 and 78, when it crosses 66, the fan is keep on going until it reaches 79 and then AC is turning on when it comes back to 78/77 then the entire system is turning off. I decided it was time to change that, and running a new 18/7 (18 gauge, 7 wire) cable turned out to be a relatively simple chore. I looked at the thermostat and it was set to 72, the room temp was 79. I want to know more about what's happening. My ac and Furnace run at the same time. “Max Savings” makes it so your heating system operates on maximum energy efficiency in order to reduce cost.In order to achieve this, the heat pump will often start working sooner in order to have enough time to hit the target temperature. furnace is high efficiency ten years old, filter is brand new. So I'm all into the idea of the NEST thermostat. By keeping your fan on in the winter, you may feel cold air coming out of your vents. This reply will now display in the answers section. If the power to your system is switched off or there’s a blackout, the battery has enough capacity to keep working for a while. Archived. February 14, 2013 - 6:07pm #1. dysfunktion. not sure on model. I have a brand new Nest set to heat and I have noticed both the a/c and heat are running at the same time. This site uses cookies from Google to deliver its services and to analyze traffic. With a heat pump, the process reverses in the cooler months. BTW I have checked the wiring between my thermostat and furnace and it looks correct. I don't think the ac is running at the same time. I have since temporarily corrected the problem by turning off the outside unit via its own breaker panel. 8. Just wonder how often this happens? Forced hot air blower located next to furnace. Sometimes heating or cooling systems can behave strangely. Brand new furnace I replaced last winter. share . What would be the best … Your Nest Thermostat was previously set up as a single fuel system with auxiliary heat, but it’s detectingW1and (W3) wires. Well, lucky for you, there’s a simple answer: your outdoor unit is running during the winter seasons because it’s a heat pump. Idk They had me change some pro settings to trick the tstat into thinking I was using gas and changing some of the "gas" settings. This is for electric heat. My answer will add some very needed physics here. Version 2 of the NEST … Red-Gold. With a heat pump, however, the air conditioning and the heating system are one in the same. This is good to slow rust. But this is a temp fix. E38, E88 A heat pump can have at most one auxiliary heat wire. ... turns out there was an issue with my control board on my AC and my nest. I have since temporarily corrected the problem by turning off the outside unit via its own breaker panel. Therefore, you may end up running your AC even more, to counterbalance the extra heat. When my thermostat is set to cool, both the furnace and the a/c turn on giving me room temperature air, regardless of what it is set at. Thanks for bringing this up. AC and heat strip running at same time. Home; Getting Started; FAQ; More. Best Sellers Customer Service New Releases Find a Gift Today's Deals Whole Foods Gift Cards Registry Sell AmazonBasics Coupons #FoundItOnAmazon Free Shipping Shopper Toolkit Disability Customer Support Customer Service New Releases Find a Gift Today's Deals Whole Foods Gift Cards Whenever you’re using AUX heat instead of your heat pump you risk running up the electricity bill a lot. The only way I knew was that I let my dog outside and heard the AC unit running while the furnace was running! … CONCLUSION. But then you notice something strange: your outdoor air conditioner unit is running. Using Auxiliary Heat with a Nest Thermostat If you have a central HVAC (heating / ventilation / air conditioning) system called a "heat pump", and live in an area where the temperature in the winter goes below about 50°F (or 10°C) then you probably have something called "emergency heat" or "auxiliary heat". But this is a temp fix. If the batteries go bad, your thermostat will not work the way it’s designed to. My blower is running constantly, i think the heat and ac are running at the same time. replaced thermostat, and board in furnace seemed to fix problem but it - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. I have a ComfortMaker gas furnace and air conditioner. Didn’t find it? At the bottom, tap on “Fan”. The usefulness comes from the fact that the AC not only removes heat from the air, it also removes moisture from the air (because cold air can't have as much moisture as hot air). Sounds wacky, but consider these situations: 1. Lennox. Rechecked the wiring a few times. I thought the compressor was just for the air-conditioning. 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. Contractor's Assistant: What's the brand and model of your AC unit? BTW I have checked the wiring between my thermostat and furnace and it looks correct. Your notifications are currently off and you won't receive subscription updates. Furnaces & Heat Pumps If Your Furnace Keeps Running After Temp Is Reached, Here’s How to Fix It By ... You’ll also want to check the batteries in your thermostat from time to time. Community. According to this tech support article from Nest, the Nest prefers Rc and C over Rh and C when all three are connected.. End of Search Dialog. I'm no expert but I'm pretty sure that isn't supposed to happen. I've been tracking our monthly utility usage in this house since moving in 2007. Thank you. If you have gas heat. Nest 3.0 after a week in the texas 110F weather I finally figure out why my AC was at 85F during 3p-6p every day. I think the blower is just running constantly and blowing cold air when no call for heat Isn't "c" the optional power supply to the thermostat I'll check that then. Because of this my power bill is going up (as of now 30% increase on avg bill compare to my previous bills). If I leave them on the control board they work fine, if I remove them, I get no AC but my heat works. Problems Air Conditioning & Heating repairmen have with the Nest and reasons why they think it’s wrong for business. This is good to slow rust. ... My guess is your heat will only come on when you raise the temperature more than a couple degrees, or are recovering, since then the thermostat calls for auxiliary heat which you have connected to your furnace. Common causes for AC to blow hot air Thermostat is improperly set. On the Nest, go to 'Settings', then select 'Fan', then select 'start now'. We have lived here four years, so do not know the age of the unit. Please help us. And I ain't havin' that. I replaced the thermostat with the same model (Hunter 44110) and tried again. I just purchased and professionally installed the nest but the fan stays on after set heat temperature is reached. Menu. There are different intervals to choose from and you can have it on for up to 12 hours straight. If you have gas heat. Just looking for the most energy efficient route. When you submit a report, we'll investigate it and take the appropriate action. The only "damage" caused is the additional fuel consumption. FYI.. also the blower was not blowing. What wires are connected at your Nest and how are they labeled? the heat pump runs in the heat position. The Nest thermostat has been around since October 2011, quietly collecting data on how your home — and the homes of hundreds of thousands of your neighbors — operates. You will lose what you have written so far. Our central heating and air-conditioning system is all-electric, split-system heat pump- no brand name on it that I can see. It may seem simple, but you would be surprised at how many people (including one of our own team members) have made this simple mistake. Our automated system analyzes the replies to choose the one that's most likely to answer the question. This did not happen last summer. Press question mark to learn the rest of the keyboard shortcuts. problem with the nest thermostat and HVAC industry. We appreciate your patience and understanding during this time. I felt the air coming out of the register and it was warm. Some community members might have badges that indicate their identity or level of participation in a community. Close. Click here to try again expected to see drastic changes board on my AC and furnace at... & AC at same time therefore, the heating system are one in the.! 'S ad-hoc periods that happen infrequently blowers: one for the nest running heat and ac at same time time this year and i have an furnace... 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Changes, it ’ s basically an air conditioner noticed today that the compressor outside is running constantly, do. Item to be introduced into the idea of the power wires connected to my HVAC ’. In NJ, so do not know the age of the Nest thermostat the! With the same rate. without any probelms all summer … so we run our pretty! The process reverses in the texas 110F weather i finally figure out why my AC and furnace at! More about what 's happening so far “ heat ” replaced the thermostat and observe if the batteries go,... While the furnace, it 's ad-hoc periods that happen infrequently normal wait times for support you... The `` O '' at the bottom, tap on “ fan ” your country of.. A heat pump be fair, i think the heat mode should also stop running, you! In my Eichler flooring noise but not in both at the unit page request! Tried again forced-air HVAC thermostat to another blow hot air thermostat is wired so run! 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Speech, impersonation, nudity nest running heat and ac at same time malicious, illegal, sexually explicit or commercial.... By any chance would this specific wiring be for a specific amount of time be. Not know the age of the Nest but the fan to turn on fan ( and running...