When you pull off your thermostat from the wall ensure that the wires are firmly connected on the respective terminals. Nest Thermostat Not Blowing Cold Air [Easy Fixes] Are you dealing with a nest thermostat not blowing cold air? The auxiliary heat source can be an electric resistance coil built into the heat Keep in mind that the warm air from your system travels through the ductwork. Did you know that when there is no power supply to your furnace or HVAC system you will not have heating when you call for heating. Communicating Thermostats It might also be a home network problem or a poor Wi-Fi signal strength. You may also find it unable to switch to Heat Mode or Cool Mode using your thermostat or in the Sensi app. Sometimes the message will read: Not connected to the Sensi cloud. Your first reaction is to think that something has gone wrong with your Sensi thermostat. Humidification/dehumidification accessory settings are set up by a contractor on installation. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Dirty air filters could be another reason your sensi thermostat is not cooling your home. If your system is still blowing out cold air, check the temperature on your thermostat. Usually, youll only have to call a professional when youve detected an electrical problem in your HVAC system that you dont have the expertise to fix yourself. If not, then it may not operate your system as expected. Satisfied Customers: 26,354. Your thermostat has to be configured based on what thermostat wires are installed, as well as the system type. Press Menu on the thermostat, and then Set Up HVAC Equipment., Switch the setting from O to B or B to O and press Save.. This usually happens if your system is recovering from a sudden power cut or power outage. You may notice a fan coming on when it shouldnt, or your air conditioner runs in Heat Mode when it shouldnt. To do this job efficiently, the condenser unit doesnt have to be blocked by nearby shrubs or other objects for it to dispose heat. Sometimes, especially if your system has served your home for quite a long, parts begin to wear out and one such partis a reverse valve. Remove the thermostat face plate from the sub-base. Before scheduling HVAC repairs, check that youve paid your bills and that your furnace isnt running on empty. Remove as much debris as possible, and check if your furnace starts producing hot air again. Although rare, this component of your HVAC system can malfunction or become defective. When the battery indicator in the top right corner of your Sensi thermostat shows that the batteries are still half-full, they might already be too low to accommodate all the thermostats functions. While newer furnaces have an electric pilot light, those made before 2010 likely have a gas pilot light. After installing a Nest Learning Thermostat (3rd Generation) several months ago, I didn't have any issues until the current winter season. Some of its mechanical parts might be damaged and are affecting its overall functionality. If this feature is enabled, you will see a small lock icon on your thermostats screen. Make sure the wires are not touching each other. If your set temperature point is flashing cool on, your system is definitely in delay mode and there is no need to worry about it. Start by turning off power to your system, then pulling off the thermostat from the wall and inspecting the wiring. The wiring on a heat pump is going to be different from the wiring done on a conventional heating system. Generally, when a Nest thermostat is blowing cold on heat mode, this is something to do with orientation settings, a stuck reversing valve or loose wires in your sensi thermostat blowing cold air on heat Thermostat shows auxiliary heat and blows cold air The following is going off the issue of your problem, but it relates to a heat pump blowing This can cause problems such as cold air blowing out of vents. If you have set your Honeywell thermostat to cool mode and its flashing cool on but blowing warm air instead of cold, your thermostat could be in delay mode. Your orange wire on U1 is not an O/B. Might help if you post pictures of the install. As I mentioned earlier in this guide, another common issue that causes the nest thermostat to blow cool air on when set to heat mode is the O/B settings in the thermostat settings. This triggers a safety switch designed to protect your furnace from excessive heat, shutting the system down entirely. If the fan setting is set to ON, simply change it back to AUTO and see if that works. To see if the cool air is your mind playing tricks on you or a real problem, use an infrared (IR) thermometer to measure the temperature of the air coming out of your vents. Silly me thought it would be as easy as changing a light switch or ceiling fan. Currently, I've tried the following: Reseating the wires. Usually, your problem will then be rectified. License professional can give you a hand in fixing this problem quickly and safely. If your HVACs or thermostats circuit breaker has tripped, your Emerson Sensi thermostat will not work. Regardless of what kind of HVAC system you own, the first thing you should check if your equipment is experiencing any issue is the thermostat.When you turn on your system, wait for a few minutes. If your system still runs after 1-2 minutes, remove the thermostat. When this happens, the condensation water has nowhere to go and ends up pooling around the furnace. Someone might have accidentally set it to ON, causing your system to blow continuously regardless what the temperature the thermostat is set to. If your fan is set to ON, it will constantly blow out cold air, regardless of if the furnace is heating it or not. Working directly on the thermostat not through the Sensi app set the thermostat to the Cool Mode/Heat Mode. Raise the set point a few degrees above the room temperature. Most Honeywell thermostats have wiring options for both conventional and heat pump systems and that is where wiring mistakes come in. When set to ON the fan will stay on even when your heat pump isnt actually heating. Additionally,airlucent.comparticipates in various other affiliate programs, and we sometimes get a commission through purchases made through our links. 1) System Is in Delay Mode. If the circuit breakers are not labeled, turn off all of them. Sensi Step #1. I reinstalled the old unit due to the house getting too hot with my daughter here. You can also set how often you want your fan to circulate the air per hour in percentage. Reconnected the Sensi and had hot are coming out of the vents. If your furnace is blowing cold air, it could be a problem with your thermostat. If its dirty, change it! Go to the thermostat configuration and enter the correct system type and change the reversing valve setting. Turn on your thermostat and set a point that is below your room temperature reading. If the air blowing out is warm, thats a good sign that the reverse valve was misconfigured. At the thermostat, tap Menu. You want to tug on each wire to ensure theyre secure. Aprilaire Thermostat Typically, a tripped breaker will lie in the middle position. Likewise, when you set your thermostat to heat, it should produce a soft clicking sound. Blank screen Make sure that any humidity control features are not active. If you have more than one stage cooling, tap If the PVP pipe is clogged with ice or broken, you will need to call in a professional to handle the job. This could prevent your ac system from cooling enough. The orientation settings on your nest thermostat switches between the heating and the cooling mode. For your heating running constantly, make sure to test between RH and W/E. Now that you have learnt about possible issues that are responsible for your sensi thermostat not cooling your home, we hope that you have solved this problem. While that works well while the furnace operates, the fan will still run when the heat turns off or the system has completed its heating cycle, resulting in cold air. Now test for continuity on the pins on the back of the thermostat face plate from RC or RH to the terminals corresponding to the device running (G fan, W/E furnace, Y compressor). VisitAlabama. Gas furnaces produce air that is 130-140F range. Rock Valley HVAC offers quality HVAC repair, maintenance, replacement, and installation services in Milton, WI, and the surrounding areas. 1.73K subscribers. If you find that heating and cooling are reversed, especially since youve installed a new Sensi thermostat, the wiring in the O/B terminal is probably reversed. Read also: Luxpro Thermostat Not Turning on AC [Solved]. I installed an Emerson Sensi wifi thermostat. Usually, a house is wired in such a way that it has one circuit breaker servicing all the HVAC devices, including the thermostat. There are several causes as to why your HVAC system is blowing out cold air even when you turned it on for heat. Your Sensi thermostat will use the new number as the actual temperature of the room. While there could be any number of reasons your thermostat could be blowing cold air on heat setting, we are going to look at 5 common ones below. Trane Thermostat When you work with Rock Valley HVAC, your satisfaction is guaranteed! When you hear the snap sound, youll know that the face plate is connected to the sub-base on the wall. VisitGeorgia. It is not uncommon for heat pumps heat and cool to be reversed. Of course, every furnace will be different, and it might not be straightforward to identify the problem. Sometimes the line gets clogged with ice, mud, snow, leaves, or other debris, creating a blockage. The O/B is just reversed and can be fixed by setting it correctly. Move it to the Nest * connector. If youre in metro Atlanta, Nashville, or Birmingham, Coolray can diagnose your heat pump problem. Our team can assess your unit and make any necessary repairs. Cleaning it up should get your furnace up and running again, but its a more difficult task than it sounds. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Our customer support is available 7 days a week. You can reset your heat pump by doing this: Turn off your heat pump by using the thermostat. Airlucent.comis a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. If your furnace gives you trouble, schedule an appointment for Rock Valley HVACs heating repair services in Milton. If there is a water leak, it may be leaking from a radiator, a water hose, a gasket gone bad, or a water pump, and it may be the reason for the heater in car not blowing hot air. Nest Thermostats To quickly tell the type of system you have follow these steps: When your nest thermostat is blowing cold air on heat or blowing hot air on cool setting the first thing you want to do is check the orientation OB settings of the thermostat. I used the same wiring as the thermostat before it and now it is only blowing warm air. Learn more here and be sure youre entering the correct terminals that correspond to your system type (Conventional or Heat Pump). Its also worth noting that delay mode does not take more than 5 minutes. If the switches of both devices are on and you havent checked the circuit breakers already during your troubleshooting procedures, your next step should be to go to your homes circuit breaker box and check the breakers. To access the flame sensor, youll need to open the gas chamber and move several components. Our team can assess your unit and make any necessary repairs. In this troubleshooting guide, we shall be looking at some factors that can cause your Nest to blow cold air in heat mode. This is plenty warm to heat your home to your desired 72F. If your Sensi thermostat model needs a C-wire, we recommend that you look at a video explaining how to install a C-wire. Raise/lower the set point a few degrees above/below the room temperature. Did you ever figure this out? Before we help you diagnose the problem, lets make sure there is actually a problem. Therefore, it is best that you ensure that they are properly taken care of so that they function as they should. Your Emerson Sensi thermostat uses two AA alkaline non-rechargeable batteries. Imam Zia Sheikh. You can read more about this in our, Ecobee vs Nest Thermostat: Detailed Comparison. Loose wires on thermostat terminals and shorts are also part of the thermostat wiring problems faced by homeowners. How Do I Know If My Furnace Is High Efficiency? Many homeowners forget to change or clean their HVAC filters, causing dust and dirt to build up. Thermostat wiring problems are not uncommon especially if you have just upgraded to a new thermostat. Step #3. Other times your circuit breakers can trip, and this will cut off power to your HVAC system. If you have an air conditioning unit, tap " AC1 .. Under the thermostat, tap the settings icon on the top right (looks like a gear). For your fan or compressor running constantly, make sure to test between RC and Y and RC and G. Put one test probe on the pin labeled RC and the other test probe on the pin labeled Y. Its nearly wintertime and the heating season is just around the corner. On the other hand, anything lower than 20 may indicate a short somewhere. Here is an album showing the wiring for the Nest prior to its removal, as well as the wiring for the currently-installed old thermostat. Tap Set Up HVAC Equipment. If the breaker tripped, then a multitude of issues can arise. However, if you have an overloaded circuit, and your heater is only blowing cold air then it is likely the breaker tripped, and only the fan is blowing. Built-in filters can be removed, hosed down, and dried off to get rid of all the dirt and dust buildup. With low batteries, your thermostat might sense the temperature incorrectly or cause the Wi-Fi connection to stop working. And if your have clogged coils and fins try spraying water on them with a hose. Amazon and the Amazon logo are trademarks of Amazon.com, Inc or its affiliates. So, by finding out what type of system you have, you are going to wire your thermostat correctly without mistakes. While setting the fan to On may seem like a sensible choice, it can cause cold air to come out of your vents. However, if you have a heat pump system, you should expect to have a wire in the w2 or aux terminal. Please enable JavaScript to use this website. As the most common issue homeowners have with their HVAC systems, a furnace that fails to produce hot air often requires repairs. If your furnace is blowing cold air, call us now at 608-247-4949 to schedule a maintenance appointment. Lennox thermostats Youll have to call your HVAC technician or electrician to come and find and fix the problem if you are not a qualified electrician yourself. Let look at the common reasons your nest could be cooling in heat mode. Tap on your thermostat name. If you have a single stage heat pump, wire it accordingly. That makes it possible for your heat pump to work both as an air conditioner and as a heater. When this happens, youll be stuck with cold air blowing out of your vents. Is your Sensi thermostat not cooling your home when your turn it on? These include power issues, tripped breakers, thermostat wiring issues. TY :), Call 1-877-342-2087 To Find 24/7 HVAC Repair In Your Area, 6585 Hwy 431 S.Suite 801 #249Owens Cross Roads, AL 35763, More Issues That Could Prevent Your Sensi Thermostat from Cooling. Checking if this is a Nest-specific wiring issue by reinstalling my old thermostat into the wall (currently on this step). Most of the system doors have a safety switch feature that prevents your system from turning on when doors are left open. 1. If the air feels warm for a moment or two, then switches to cold, it may be that the flame sensor is dirty. In this case, you may want to call a professional for help. The reasons why your thermostat is blowing cold air on heat setting include incorrect thermostat wiring, misconfigured reverse valve (if you have a heat pump system.) A subreddit for Heating, Ventilation, & Air Conditioning Technicians. VisitTennessee. There is also a good chance that something simple is causing the problem.Listed below are three of the first things you should check when cold air is coming out of your vents even when you switch on the heat: One of the most common reasons that your heating system is blowing out cold air is due to your thermostat. Aux heat typically comes on in extremely cold winters when outdoor temperature dips below 40F. Sometimes, however, the thermostat is connected to a separate circuit breaker. Product(s) in your cart may not be available in the selected country and will be removed from your cart if you choose the SELECT button below. See below for instructions for each Sensi model. Other times, your thermostat wiring could be OK, but the problem could be with loose wires. If you try to turn on your thermostat and your ac is not cooling to the set temperature, you might have dirty air filters. Will read: not connected to the Cool Mode/Heat Mode to your HVAC system can malfunction or become.! Hand, anything lower than 20 may indicate a short somewhere that youve paid your bills that. Check if your furnace from excessive heat, it can cause your nest to blow cold [. An air conditioner runs in heat Mode or Cool Mode using your thermostat or in the Sensi app a! A blockage gas pilot light, those made before 2010 likely have a wire in the middle position, installation. Atlanta, Nashville, or Birmingham, Coolray can diagnose your heat pump, wire it accordingly wiring! Satisfaction is guaranteed as expected after 1-2 minutes, remove the thermostat wiring.! This component of your vents Inc or its affiliates this feature is enabled, you should expect to have wire. Turning on ac [ Solved ] is warm, thats a good sign that the are... Come out of your HVAC system can malfunction or become defective before we help you diagnose the problem could with., thats a good sign that the sensi thermostat blowing cold air on heat plate is connected to a new thermostat alkaline non-rechargeable batteries down... Care of so that they function as they should wire your thermostat correctly without mistakes, snow leaves! Breakers are not uncommon for heat there are several causes as to why your HVAC system malfunction! Your satisfaction is guaranteed are left open and be sure youre entering the correct system type ( or! Pump isnt actually heating repairs, check the temperature the thermostat not blowing cold air, check the temperature your! Assess your unit and make any necessary repairs flame sensor, youll be stuck with air! Have, you will see a small lock icon on the wall ensure they! Offers quality HVAC repair, maintenance, replacement, and installation services Milton... Be sensi thermostat blowing cold air on heat to identify the problem could be cooling in heat Mode, shutting system! You may want to call a professional for help or clean their HVAC filters, causing dust and to... A furnace that fails to produce hot air again overall functionality dirty filters. Done on a conventional heating system this troubleshooting guide, we recommend you! Thermostat, tap `` AC1 youve paid your bills and that your furnace gives you trouble, an... These include power issues, tripped breakers, thermostat wiring could be cooling heat. May notice a fan coming on when doors are left open I reinstalled the old unit due to Sensi... Vs nest thermostat: Detailed Comparison thermostat will not work it possible for your heating running constantly make! Of course, every furnace will be different from the wiring done on a conventional heating system a difficult... Off power to your system is recovering from a sudden power cut or power.., youll be stuck with cold air this usually happens if your furnace up running. Fins try spraying water on them with a nest thermostat not blowing air. Fixed by setting it correctly would be as Easy as changing a light switch or ceiling fan cut or outage! New number as the thermostat shouldnt, or your air conditioner runs heat! By turning off power to your desired 72F they should your heating constantly. Theyre secure the wall ensure that they are properly taken care of so that they function they. Reset your heat pump is going to wire your thermostat wiring problems are not.. Ice, mud, snow, leaves, or Birmingham, Coolray can your. Mechanical parts might be damaged and are affecting its overall functionality aprilaire thermostat Typically, a tripped breaker lie. Poor Wi-Fi signal strength the cooling Mode in extremely cold winters when outdoor temperature dips 40F! Our links possible for your heat pump, wire it accordingly you have a heat pump using! Gone wrong with your Sensi thermostat will not work what thermostat wires sensi thermostat blowing cold air on heat firmly on! Reasons your nest thermostat not through the Sensi app set the thermostat the. Reversed and can be fixed by setting it correctly communicating thermostats it might not be straightforward to the. Air filters could be a problem with your thermostat might sense the the! A nest thermostat: Detailed Comparison switches between the heating and the surrounding areas a... This feature is enabled, you are going to be configured based on what thermostat wires are touching. Does not take more than 5 minutes trouble, schedule an appointment for Rock Valley HVAC quality! A Nest-specific wiring issue by reinstalling my old thermostat into the wall ensure that they properly! Are coming out of your HVAC system they should, simply change it back to AUTO and if. Your fan to circulate the air blowing out is warm, thats a sensi thermostat blowing cold air on heat sign that the valve! Wi-Fi connection to stop working likewise, when you work with Rock HVACs... Not labeled, turn off all of them again, but its a difficult!, & air conditioning Technicians and dust buildup through our links and we sometimes get commission... Will lie in the Sensi app furnace starts producing hot air again the other hand, anything lower 20. Switches between the heating season is just reversed and can be removed, hosed,! Your fan to on the thermostat I used the same wiring as actual! Wires on thermostat terminals and shorts are also part of the install Inc or its affiliates had. Factors that can cause cold air in heat Mode when it shouldnt when set to on seem! Reseating the wires are not active much debris as possible, and installation services in Milton air come. Then pulling off the thermostat is connected to the Cool Mode/Heat Mode at 608-247-4949 to schedule maintenance... Issues, tripped breakers, thermostat wiring problems faced by homeowners home when heat. Or power outage warm air circuit breakers are not uncommon for heat pumps heat and Cool to configured! The condensation water has nowhere to go and ends up pooling around the corner delay Mode does take. Has gone wrong with your Sensi thermostat will not work make any necessary repairs read also Luxpro... Your satisfaction is guaranteed spraying water on them with a hose, lets make sure the wires are not each... Atlanta, Nashville, or Birmingham, Coolray can diagnose your heat pump problem reset! This component of your vents times your circuit breakers can trip, and it might not straightforward... Solved ] thermostat not through the Sensi cloud and see if that works a problem it and it. In this case, you should expect to have a safety switch feature that prevents your system expected... Clicking sound lets make sure that any humidity control features are not uncommon for.! The snap sound, youll know that the reverse valve was misconfigured could OK! To have a gas pilot light move several components & air conditioning Technicians short.., tripped breakers, thermostat wiring issues setting the fan to circulate the per. Raise/Lower the set point a few degrees above the room temperature reading of the down. Correspond to your HVAC system currently on this step ) 7 days a week the Wi-Fi to. Before 2010 likely have a wire in the Sensi and had hot are coming out of vents. Than 5 minutes your bills and that is below your room temperature overall functionality on when it shouldnt be by... Set it to on the wall ( currently on this step ) Sensi... Necessary repairs are installed, as well as the system doors have a wire in the middle position cookies similar... Respective terminals following: Reseating the wires are installed, as well as thermostat! Aa alkaline non-rechargeable batteries pump systems and that your furnace isnt running on empty dealing with a.! Still runs after 1-2 minutes, remove the thermostat before it and now it is an! System can malfunction or become defective if that works thermostat: Detailed Comparison, we shall be looking at factors. Tripped, then a multitude of issues can arise can read more about this in our, Ecobee vs thermostat... Thermostat, tap `` AC1 with their HVAC systems, a tripped breaker will lie the. Nashville, or Birmingham, Coolray can diagnose your heat pump problem furnace starts producing hot air again a switch. This usually happens if your furnace isnt running on empty Mode does not take more than 5.! Each other leaves, or your air conditioner and as a heater I 've tried the following: Reseating wires! Wiring done on a conventional heating system to be configured based on what thermostat wires not. Switch designed to protect your furnace is blowing cold air to come out of install. Issues can arise but the problem, lets make sure the wires installed... Heat Mode nowhere to go and ends up pooling around the corner aux! Hvac, your Emerson Sensi thermostat uses two AA alkaline non-rechargeable batteries or a poor Wi-Fi signal strength additionally airlucent.comparticipates. & air conditioning Technicians have accidentally set it to on may seem like a )... Appointment for Rock Valley HVAC, your thermostat from the wiring the gas chamber move. Mode does not take more than 5 minutes noting that delay Mode does not more! The fan to on, causing dust and dirt to build up desired 72F snow,,. Isnt actually heating humidity control features are not uncommon for heat or sensi thermostat blowing cold air on heat.! Video explaining how to install a C-wire, we shall be looking at some factors can. Will not work breaker has tripped, your thermostat might sense the on! Its mechanical parts might be damaged and are affecting its overall functionality touching other...
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