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You can always consult the owner’s manual to be sure of the steps you have to take if your Honeywell thermostat is not working. It’s one thing for your Honeywell Thermostat to have issues, and it’s another different thing when it’s not working at all. Although it could be quite disturbing, you can get it fixed with these two simple steps. Installing your thermostat close to warm areas like kitchens, windows, or an air vent isn’t something you should do.

Issues where the thermostat was previously heating normally are addressed in the “Additional Steps” below and may need to be addressed by a local HVAC professional. Check the name or model number of your product to ensure it's correctly written in the search bar above. Some thermostats open easily so that you can clean the inside. Make sure your router hasn’t reached its max number of devices.
Honeywell thermostat says heat or cool but you're not feeling it?
Similarly, the internal parts of your thermostat can break down, loosen or gather dust over time. This can also keep the unit from working like it should. If your thermostat still isn't functioning properly, you will need to manually test the connections. To do this, use a wire nut to attach the red power supply wire to the green fan wire, then turn on the power. If the fan comes on, this is a sign that your thermostat is failing to send the signal to the fan. Your thermostat might act up because of the wrong location.

Your first email containing an exclusive coupon code will be arriving shortly. Speak directly with an agent for help with our products. Turn off your phone’s mobile data and make sure that you are connected and registering through the same Wi-Fi network that your thermostat is on.
Why is my Heating not Working?
If your unit is too small, then it will have trouble getting the right temperature air to all areas of your house. This can particularly be an issue if you have expanded your house by doing something like adding an extra room. If this is the problem, you might consider buying a larger HVAC unit or adding an additional unit to your home.
Dust, nicotine buildup, and other dirt inside can all affect your thermostat’s performance. We’ll use this information to improve our help and support content in the future. If you are attempting to connect and register via a mobile hotspot, your phone and thermostat should be on the same hotspot network.
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Another option is to check all individual components of your HVAC system. There might be a problem with the furnace/boiler or the heat pump. Likewise, for the air conditioning system, the indoor or outdoor fan may be out of order. The first step will be to see if your thermostat is powered properly.

You can set the thermostat five degrees higher than the required one in the winter season. Thermostats get their power from one or more of three different sources, depending on the type of thermostat you have. On most thermostats, you can take off the thermostat by grasping and gently pulling. If you still feel nothing Continue to the “additional steps” located below. Some use a selector switch that closes/blocks the Rc terminal and links the R and Rc terminals together. We hope you find the possible solutions and remedies presented above useful in determining and solving your HVAC issues.
Is It In The Wrong Location?
If it still trips repeatedly, then leave the breaker in “off” mode and call an HVAC company to further investigate. Turn the heat or cold up to full by raising or lowering the temperature respectively. If the fan is not turning on, the problem is either with the wiring of the thermostat or the device is defective and needs replacing. Wiring issues can prevent your thermostat from getting power. This problem can arise especially if you recently took the thermostat off the wall to replace its batteries. Smart thermostat with updated technology, it is time to get a new one.

Give your local HVAC professionals a call — they will advise you on whether or not your thermostat needs to be replaced. Worst case scenario, your thermostat is at the end of its life and simply needs to be replaced. While all thermostats are different, the average device has a life expectancy of about 10 years. If you notice that the sensor has gone off when you check the safety switch, call your local HVAC professionals for an inspection.
Another reason for the thermostat not working may be a clogged air filter inside the furnace. In such a situation, when you turn on heating mode, there will be no warm air coming out of the blower. The thermostat uses battery power when the HVAC system is not running. Sometimes the thermostat faces low battery issues, or the battery is unable to charge. Low battery problems can also affect the regular operation of your thermostat. Smart thermostats use a C-wire that connects the thermostat with an HVAC system and charges the thermostat’s battery.
Even in cases of screen flickering, fading, or completely turning off, replacing the batteries might quickly solve your issue. For problems that are specific to the model you have, you can fetch the manual below. However, before that, go through the guide to see if the problem is one of the common ones. Go to this page to read the Honeywell thermostat instruction manuals. However, there are several reasons why it may be better to leave thermostat installation to the professionals.
Problems can also occur if the fan on the thermostat is set to “on” instead of “auto”. This is because this signals the system to run constantly, even if your house has already reached the correct temperature. Sometimes, homeowners can fix these kinds of problems by doing some simple troubleshooting on their own.
Is the thermostat displaying the temperature accurately? If you observe differences, your temperature sensors need to be replaced. If your thermostat needs a C-wire, check to see if a wire is connected to the usually black-colored C terminal.
We do not recommend attempting wiring repairs unless you are certified to perform the job. This is the simplest explanation for why your room thermostat is giving you problems. If your thermostat is battery-operated, the batteries might be a regular AA or AAA alkaline or 3V disc-style lithium ones. For better performance of your thermostat, it is recommended to change the batteries once every year.
Heat pump systems use the outdoor compressor to provide both cooling and heating. If your outdoor compressor previously ran when your system is heating, you have a heat pump. Go to your home’s circuit breaker and make sure the breaker to the furnace is turned on. Next, go to your furnace or heating system, often located in your basement, attic, or garage.
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