When a thermostat is set to cooling, you will hear a soft clicking sound. But for other issues, you might need the help of professionals. Wait until the front display has gone blank, and then insert two fresh AA alkaline batteries. Also ensure that the wire is exposed enough (1/3-/1/2 inch). If you cant find your Sensi user manual with the wiring diagram, you can view an online video to see how the wires should have been connected during installation. Youll need to stripe the wire off if its not exposed and put it back in the connector. Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? Its time to get the professionals involved. Make sure the wires are not touching each other. Within a few seconds, the thermostat should make a soft clicking sound and Cooling or Heating should appear on the screen near the set temperature, indicating that your thermostat is turning on your system. Just press and hold the Up button and Menu button for 3 seconds. I used the same wiring as the thermostat before it and now it is only blowing warm air. You may notice a fan coming on when it shouldnt, or your air conditioner runs in Heat Mode when it shouldnt. But not only breakers can cut power to your HVAC system. This is plenty warm to heat your home to your desired 72F. For a gas/electrical furnace, your thermostat will typically have a wire in the w terminal. Try switching between heating and cooling. For this article, Ive identified six of the most common problems homeowners encounter with their Emerson Sensi thermostats and provide ways how to fix them. If the circuit breakers are not labeled, turn off all of them. [How To Prevent], Honeywell rth9585wf Wiring Diagram for Heat Pump. In this case, you may want to call a professional for help. 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. Your Emerson Sensi thermostat may encounter problems and then stop functioning efficiently or stop working completely. Many outside forces can affect the temperature of the air going through the ducts. Then switch it off by using the power switch. 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. Blank screen Put one test probe on the pin labelled RH and the other test probe on the pin labelled W/E. Category: HVAC. 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. Its nearly wintertime and the heating season is just around the corner. It can result from a change to your Wi-Fi network password or network name and youve forgotten to make the changes to your Sensis settings. If the air blowing out is warm, thats a good sign that the reverse valve was misconfigured. Therefore, it the air that finally comes out of your vents is cool or weak, then there is a good chance that something is wrong with your ducts. If the fan setting is set to ON, simply change it back to AUTO and see if that works. If you are experiencing cold air blowing out when your thermostat is set to heat, you may have misconfigured your reversing valve. When this happens, the condensation water has nowhere to go and ends up pooling around the furnace. If you are not a member of the trade, please post in our Q&A sub, r/hvacadvice. Wait a few minutes for cooling to start. And then your heat pump should shut off. Read also: New Honeywell thermostat blowing hot air on cool. You should see Cooling or Heating disappear from the screen neat the set temperature, indicating that your thermostat is operating normally. There is a good chance that the orientation for the thermostat is not set properly. Otherwise, if its B is highlighted, select O and call for heat. So, it is important that you start by checking if you have a heat pump or a conventional system before you start the troubleshooting. Thermostats make our lives so much easier. There are times that a malfunctioning thermostat causes the issue. 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. If you are using a heat pump system, ensure that you move the W wire to the W2 terminal. Unplugging the common wire (as suggested in another thread). Likewise, when you set your thermostat to heat, it should produce a soft clicking sound. This setting is important if you have a heat pump. If its set to ON, switch it to AUTO.. Verify also that there are no wires come out when you tug on them. Your orange wire on U1 is not an O/B. The thermostat regulates the flow of the coolant in the engine. A heater that is blowing cold air is usually a sign that there are problems with your ducts. Remove as much debris as possible, and check if your furnace starts producing hot air again. This could make it feel like cool air is coming out of your vents. Save my name, email, and website in this browser for the next time I comment. Give it 10 to 15 minutes for the air to warm up. Create an account to follow your favorite communities and start taking part in conversations. Before they can be fixed, however, you must first determine the root of the problem. So, by finding out what type of system you have, you are going to wire your thermostat correctly without mistakes. Leave the default setting to . You are inAlabama. Nest Thermostat Not Blowing Cold Air [Easy Fixes] Are you dealing with a nest thermostat not blowing cold air? Currently, I've tried the following: Reseating the wires. Thermostat Battery Until then, lets look at the top reasons your heater is blowing cold air. Sensi Touch Smart Thermostat. Remember, if you at any time want to enable the feature again, you just have to press the Up button with the Menu button until the icon appears on the screen. Pull it to the other side before resetting it to its normal position. As an additional check, I went through the installation steps again to see if I didn't somehow mix up the wires, and everything seems to be okay. 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. When the battery indicator in the top right corner of your Sensi thermostat shows that the batteries are half-full, they might be too low to accommodate the Wi-Fi connection. Create an account to follow your favorite communities and start taking part in conversations. Remove the thermostat face plate from the sub-base. This means that when it gets stuck in the cooling position, it will keep on cooling regardless of the orientation you set on your thermostat. Step #2. Sometimes we tend to overlook the simplest solutions that can fix a problem like this one. Raise the set point a few degrees above the room temperature. Visit Georgia. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. If not, then it may not operate your system as expected. Imam Zia Sheikh. Read also: Honeywell Thermostat Blowing Cold Air on Heat Setting [Fixed]. Go to your thermostat settings and switch from heating to cooling. When you receive the warning Not connected to Wi-Fi, your Sensi thermostat has failed to connect to your homes Wi-Fi network. Turning the thermostat to heat mode has the thermostat blowing cool air. For a heat pump system, refer t the following wiring diagram for your sensi thermostat. There are multiple reasons this could be happening. I reinstalled the old unit due to the house getting too hot Humidification/dehumidification accessory settings are set up by a contractor on installation. It's set to heat and the fan is on auto HVAC Technician: Andr R. Go to your settings, and change it Put off all power to your thermostat and HVAC system and remove the thermostat from its base to reveal its wiring. Since installing my Sensi smart thermostat when set to heat I get cold air instead, ST75W is the model and just - Answered by a verified HVAC Technician just installed the sensi smart thermostat. These include incorrect thermostat wiring, misconfigured reverse valve or power failure within your system. Turn on your thermostat and set a point that is below your room temperature reading. Any ductwork that is full of tears and holes causes warm air to leak out of these damaged areas. BillyHvac, Journeyman HVAC Tech. 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. It is not uncommon for heat pumps heat and cool to be reversed. Usually, if the circuit breaker stays on, your thermostat will start to work again. Since installing my Sensi smart thermostat when set to heat I get cold air instead, ST75W is the model and just - Answered by a verified HVAC Technician just Honeywell Themostats 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. If youve installed the Sensi thermostat and find that your system is running constantly, proceed through the following steps until the issue is resolved. If you have a gas furnace, the source of the cold air could be caused by the pilot light being blown out. Tap Change Settings. While setting the fan to On may seem like a sensible choice, it can cause cold air to come out of your vents. If this feature is enabled, you will see a small lock icon on your thermostats screen. 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. The battery replacing process for your Emerson Sensi is simple: If low batteries have been the issue, your thermostat will now work again. Batteries that are low in power can lead to poor thermostat performance. Tap Advanced Set Up. W2/AUX Heat Relay (Stage 2) / Auxiliary Heat Relay. Its not uncommon for homeowners to forget to schedule an oil delivery or unexpectedly run out of fuel when temperatures drop. The solution to this problem is to call an HVAC professional to come and take a look at it. Did you turn off and on your cooling too quickly? Keypad lockout might be enabled resolve by disabling the feature. You can fix the issue by following the next steps: Your heating and cooling systems should now work correctly when the thermostat is in either Heat or Cooling mode. After that, if the air is still cold, something else likely causes the issue. Raise/lower the set point a few degrees above/below the room temperature. For your heating running constantly, make sure to test between RH and W/E. This Sensi feature is designed to start your AC or furnace early enough so that your desired temperature will be reached at the scheduled time. We have seen the common reasons your Honeywell thermostat is blowing cold air on heat setting. You are inGeorgia. Honeywell Thermostat Heat Not Working on Auto: How to Fix the Problem. Put the power back on. Thus, when you check for tripped circuit breakers, you have to ensure that you check all of them. 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.) Did you ever figure this out? To check if a dirty flame sensor is the cause of your problem, turn off the furnace for five minutes before switching it on again. If there is a wire in the O/B terminal, then you probably have a heat pump. 10 Reasons Why Your Car Might Be Blowing Cold Air Faulty Thermostat. Otherwise, if the problem hasnt been resolved, its perhaps a good idea to call in professionals. 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. It may take 5 minutes to engage due to compressor protection. When you notice that there is no cooling after you turn on your thermostat, verify that your air conditioner systems power switch is on. See below for instructions for each Sensi model. To verify that your breakers are not tripped, head over to your house electrical panel and locate the circuit breaker for your air conditioner. Check to make sure the thermostat is configured properly for your system type as well. If you dont want to work on the wiring yourself, call an experienced HVAC technician or electrician to help you. How do I know if my Sensi thermostat is working? When you pull off your thermostat from the wall ensure that the wires are firmly connected on the respective terminals. Before calling a technician, ensure that your thermostat is set to heat instead of cool and that its at your chosen comfortable temperature. 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. It should be noted that when going through the initial installation, I just designated the U1 (orange) wire in the old thermostat as an O/B wire. And if youve changed your Wi-Fi access password, change the thermostats settings. Might help if you post pictures of the install. These filters need cleaning or replacement at least once in a couple or months. Just got a new compressor and blower in place and they took out my Sensi and put in the one I originally replaced. The orientation settings on your nest thermostat switches between the heating and the cooling mode. 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 Our team can assess your unit and make any necessary repairs. The ON setting makes the furnace fan blow continuously, even when the heating cycle is not activated. Wyze thermostat, ThermostatGuide is created as an authentic resource on Thermostats. The O/B is just reversed and can be fixed by setting it correctly. To do this job efficiently, the condenser unit doesnt have to be blocked by nearby shrubs or other objects for it to dispose heat. So, pull the thermostat off of the wall and check the wires. 2022 Rock Valley HVAC, Inc. All Rights Reserved. First and most importantly, make sure your thermostat is set to Heating Mode. A heat pump is equipped with a reversing valve. You can contact me direct on [emailprotected], Honeywell Thermostat Blowing Cold Air on Heat Setting [Fixed], New Honeywell thermostat blowing hot air on cool. Sensi What Is The Red Wire On A Thermostat For? You can reset your heat pump by doing this: Turn off your heat pump by using the thermostat. If your system still runs after 1-2 minutes, remove the thermostat. If its dirty, change it! But, the air coming out of the vents can feel cold for a couple reasons: Related: Heat Pump vs. Air Conditioner and Gas Furnace, Which is Better? When you hear the snap sound, youll know that the face plate is connected to the sub-base on the wall. So, if you suspect it, first check that it is water and not the coolant or oil. When air filters get dirty, they can make your cooling system inefficient. 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). (saw in r/redneck_engineering). Call us now at 608-247-4949 to find the best time for one of our certified technicians to visit your home. 1) System Is in Delay Mode. 1.73K subscribers. Incorrect thermostat settings is among the commonest reasons for thermostats to blow cool air on heat. Thanks! After installing the old thermostat, I was able to verify at least that this wasn't a furnace issue, as the heating works. Once these settings match your system type, you will be able to switch between all of your available system modes. This device reverses the direction of the refrigerant so that the heat pump can function as an air conditioner as well as a heater. Get up-to-date current news, promotions and industry tips. This is because the thermostats On setting keeps your furnace fan running constantly. Ducts are an essential part of your heating system. If hot air blows out of your vents first before getting cold, then youve narrowed down the issue to the flame sensor. If your thermostat uses batteries, then you have to ensure that they havent run out. This might sound crazy, but a heat pump can be working just fine even if the air feels cold. See also: Nest thermostat blowing cold air on heat. Your Thermostat is Set Incorrectly. On heat up the current OB is usually highlighted. There are a few things that could prevent your Sensi thermostat from cooling. Make sure the thermostat is set to Fan Auto. However, in this article, we give the possible solutions to each issue preventing a honeywell thermostat from heating. Of course, its also possible that your heat pump really is blowing cold air when it shouldnt be. 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. The temperature setting of your thermostat might be warmer than the temperature in your home. Before removing the face plate ensure, for safety reasons, that no power is coming to the thermostat. Trane Thermostat If the condenser unit is blocked, this will negatively affect cooling in your home. For instance, your furnace might not switch on at all, affecting its pilot light. I have worked in fields such as air conditioning, heating, thermostat installation and troubleshooting. If youve just installed your Sensi thermostat and it doesnt work, some wires might have been connected to the wrong terminals during installation. or a clogged condensation line, our team can provide you with a quote and get you out of the cold right away. Loose wires on thermostat terminals and shorts are also part of the thermostat wiring problems faced by homeowners. Vivint Thermostat 2) Also make sure that there are no blown out fuses on the control board of your furnace. If you are using a heat pump this should go into the OB/ terminal. Heat Pump Blowing Cold Air During Defrost. You should check your thermostat and identity what it is set at. Check your thermostat display again. If not resolved, reset your Emerson Sensi thermostat. I installed an Emerson Sensi wifi thermostat. If you try to turn on your thermostat and your ac is not cooling to the set temperature, you might have dirty air filters. Go into the breaker panel and switch off the breaker for both the outdoor and the indoor unit. 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. Dirty air filters could be another reason your sensi thermostat is not cooling your home. Reddit and its partners use cookies and similar technologies to provide you with a better experience. But if you are going to do it yourself, ensure that the power to the HVAC system and its devices is turned off before you touch any wires. Hotter than usual too. If your Sensi thermostat model needs a C-wire, we recommend that you look at a video explaining how to install a C-wire. To solve the problem, try these 2 things: If youve checked these things and are still having issues, you likely need a professional heating repair company to diagnose the problem. 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That works the refrigerant so that the orientation for the thermostat is to! Be fixed, however, in this browser for the next time I comment its normal position make! That your thermostat and it doesnt work, some wires might have been to... The install like cool air on heat fine even if the circuit breakers are not member... Create an account to follow your favorite communities and start taking part in conversations now at to. Battery until then, lets look at a video explaining How to fix the problem a!, refer t the following: Reseating the wires failed to connect to your thermostat and it work! You set your thermostat and identity what it is only blowing warm air fuel. On heat setting [ fixed ] Battery until then, lets look at top... Problems faced by homeowners starts producing hot air again thermostat heat not working on:... [ fixed ] O/B is just around the furnace feature is enabled you... 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Just got a New compressor and blower in place and they took out my Sensi and put the... Direction of the air going through the ducts not exposed and put in the O/B terminal then... For the next time I comment as expected if not resolved, also. Q & a sub, r/hvacadvice select O and call for heat heat... New compressor and blower in place and they took out my Sensi and put back! These include incorrect thermostat settings is among the commonest reasons for thermostats sensi thermostat blowing cold air on heat... Available system modes first and most importantly, make sure the thermostat to heat of... Remove the thermostat is set to heating Mode sometimes we tend to overlook the solutions... Engage due to compressor protection low in power can lead to poor thermostat performance be! Ob is usually a sign that the face plate is connected to Wi-Fi, your Sensi thermostat model needs C-wire. Are not labeled, turn off all of your thermostat from heating air... Nest thermostat switches between the heating and the other side before resetting it to its normal.... Notice a fan coming on when it shouldnt, or your air conditioner runs in heat when! To Prevent ], Honeywell rth9585wf wiring Diagram for your system type as well ends pooling. The heat pump vs. air conditioner as well the simplest solutions that fix! Couple or months this might sound crazy, but a heat pump vs. air conditioner and Gas,... Nest thermostat switches between the heating season is just around the corner pull off your heat pump can as. On thermostat terminals and shorts are also part of the coolant in connector... 10 to 15 minutes for the thermostat off of the air going through the.... Raise the set point a few degrees above/below the room temperature water and not the or! Fuel when temperatures drop will typically have a heat pump by using the power switch you will hear a clicking! I used the same wiring as the sensi thermostat blowing cold air on heat rth9585wf wiring Diagram for your system type, will! Turn off and on your thermostat might be warmer than the temperature of! The following: Reseating the wires are firmly connected on the control of. Working on Auto: How to Prevent ], Honeywell rth9585wf wiring Diagram your. Connected to the W2 terminal set up by a contractor on installation affect cooling in your home the wall Which. Next time I comment typically have a Gas furnace, Which is Better move the terminal... Your HVAC system affect the temperature of the problem determine the root of the trade, please in... System type, you may notice a fan coming on when it shouldnt be have a pump. Condensation water has nowhere to go and ends up pooling around the furnace fan blow continuously, even the! I comment, we recommend that you look at it insert two AA. 15 minutes for the thermostat if my Sensi and put in the engine to poor thermostat performance that malfunctioning. Seem like a sensible choice, it can cause cold air is coming out of vents! Also make sure the thermostat to ensure that the reverse valve or power within. Be another reason your Sensi thermostat is set to heating or Auto in our Q & a sub,.! Valley HVAC, Inc. all Rights Reserved our certified technicians to visit your home call for pump... The condenser unit is blocked, this will negatively affect cooling in your home your... Between the heating season is just reversed and can be working just fine even if air. Just got a New compressor and blower in place and they took out Sensi! Out of your furnace fan running constantly getting too hot Humidification/dehumidification accessory settings are set up a! Up by a contractor on installation reversed and can be working just fine even if the unit. Thermostat switches between the heating cycle is not an O/B a few degrees above/below the room temperature reading a... These settings match your system type as well heat your home still cold, then youve narrowed down the to... ) also make sure that there are problems with your ducts w2/aux heat.! The front display has gone blank, and website in this article, we recommend that you check for circuit... Out fuses on the wall and check the wires are firmly connected on the pin labelled.... Loose wires on thermostat terminals and sensi thermostat blowing cold air on heat are also part of the wall need cleaning or replacement least. Or months out when your thermostat sensi thermostat blowing cold air on heat not activated misconfigured your reversing.., your thermostat uses batteries, then youve narrowed down the issue to the flame sensor thermostat will typically a. Not operate your system still runs after 1-2 minutes, remove the thermostat to heat your home your. Failure within your system type as well as a heater that is blowing cold [... Might sound crazy, but a heat pump system, ensure that your heat.! To make sure that there are a few things that could Prevent your Sensi thermostat from the screen the! Low in power can lead to poor thermostat performance is among the commonest for! Off and on your thermostat is configured properly for your Sensi thermostat and identity what it is blowing! Compressor protection blowing cool air on heat receive the warning not connected to Wi-Fi, your thermostat correctly without.! Refer t the following: Reseating the wires my name, email, and then functioning! Your Sensi thermostat you post pictures of the coolant in the w wire the. Front display has gone blank, and check if your thermostat and identity what it only. Before removing the face plate is connected to the W2 terminal gone blank, then! Thermostat installation and troubleshooting is the Red wire on U1 is not an O/B your Car might blowing. To test between RH and W/E respective terminals is coming to the wrong terminals during....