Why Is My Ecobee Thermostat Not Heating?


If you’re a fan of smart home technology, no doubt you have a smart thermostat installed in your home. Smart thermostats are a handy addition to a home, as they can automatically adjust the temperature in your home to suit your preferences and because they can help you save money on your heating/cooling bills by running your HVAC systems more efficiently. 

Of course, the downside to having a smart thermostat is that it’s relatively complex compared to a manual thermostat, so there’s more that can potentially go wrong. If your ecobee thermostat is experiencing issues, it could be the result of a variety of causes.  

In this article, we’ll go over some of the common reasons why your ecobee thermostat might not be working, and we’ll be giving you some solutions you can use to resolve these issues.  

Reasons Why Your Ecobee Thermostat Isn’t Turning On the Heat:

As we’ve mentioned, there are several reasons why an ecobee thermostat might stop working. If your ecobee appears to be functioning normally but is failing to turn on your heat, then one of these issues might be the cause: 

1. One or More of Your Settings Is Not Adjusted Correctly 

ecobee thermostats allow you to change many aspects of your home’s heating/cooling within their settings. However, sometimes these settings can interfere with your temperature preferences, so it’s always best to check your settings first if your thermostat isn’t working quite as it should. 

First, you should check to see what your heat set point is at. If you don’t have your preferred temperature set to be higher than the current temperature of your house, your thermostat won’t know to make the adjustment. This is an easy enough setting to change, and you can do so either through your thermostat’s interface or through the ecobee app on your mobile device. 

Your ecobee thermostat also allows you to adjust your temperature threshold settings, which will automatically turn on your heating or cooling based on the temperature outside compared to the temperature inside. 

If it’s starting to get cold outside but your heat isn’t turning on, you can try adjusting your thermostat’s heat threshold and see if that makes a difference. If you want to adjust this setting, however, you can only do so through your thermostat’s interface.  

Additionally, your thermostat may not be turning on your heat because of a furnace fan control setting. By default, when you hook up your ecobee to your furnace your ecobee is wired to control your furnace’s blower fan, but due to a common software bug this will prevent your ecobee from being able to communicate with your furnace. 

To fix this, all you need to do is navigate through your thermostat’s settings and find the setting that allows you to switch your furnace fan control back to your furnace itself.  

2. Your Furnace Has No Power 

Your heating issues might not be caused by your ecobee, however; there’s a good chance that it’s your furnace itself that is the issue. If you’ve determined that it’s not your ecobee that is leaving you without heat, you might want to inspect your furnace to see if that’s where the problem lies. 

If your furnace isn’t powering on, first see if the breaker has been flipped, and if it has, try switching it back on again. If that doesn’t fix the issue, you may need to call in an electrician. 

If your furnace appears to be running fine but your ecobee still isn’t picking up any power from it, you may want to try switching the breaker off and on again, as this will essentially reset your furnace. 

3. Your Furnace Is Overheating 

If your furnace works some of the time but keeps shutting down on you, this may be because it’s overheating. If you think this might be the case, there are a few things you can try to fix it: 

  • Check the vents around your home and see if any of them are being blocked by something. If they are, make sure to move whatever’s in front of them. 
  • Check your furnace’s air filter and see if it needs to be cleaned. 
  • Check your furnace’s evaporator coil and and blower fan and see if they need to be cleaned or replaced.  
  • Try and run your furnace at a lower temperature than you normally would. 

4. Troubleshooting Your Ecobee Thermostat 

If your ecobee thermostat stops working completely, this is usually a sign that your furnace has lost power, since your ecobee draws its power from your furnace. 

We’ve already discussed a couple of reasons why your furnace might not have power, but there are more potential causes than just those. Let’s take a quick look at a few of the reasons why your furnace may not be powered on and go over how to resolve them. 

First thing’s first, check your breaker box and see if the breaker for your furnace has been flipped. If it has, switch it back on and see if that works. If your breaker is still on, check your fusebox and see if the fuse for your furnace is blown. If it has, your furnace should start up again once you replace the fuse. 

If your furnace shuts down due to overheating, your ecobee will shut down as well. We’ve already gone over how to deal with an overheating furnace, so if you think that overheating is the cause of your problems, take the necessary steps to maintain your furnace as discussed above. 

Lastly, your furnace may shut down if your float switch is tripped by an excess of water. Your furnace is designed to collect any condensate generated during the heating/cooling process and send it through a drain line to outside your home. 

However, if there’s something in your furnace’s inner workings that is blocking the flow of condensate from leaving your furnace, a float switch will automatically cut power to your furnace if the water level gets too high. 

If you think there is something in your furnace that is preventing it from draining properly, you can try emptying your drip pan and clearing out any blockages in your drainage system that you find, or you can reach out to a furnace technician and see if they can resolve the issue for you. 

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