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It's Getting Hot In Here! Reasons Why Your Heater May Not Be Turning Off

by Feride Halma

When you think of issues that can develop with your heater, furnace, or HVAC, one of the problems that comes to mind is the heater not working or heating up your home. Most people do not think of the opposite occurring, and a heater overheating your home because it is not turning off. However, this is an issue that can arise. If you are facing this problem, here are three common reasons why your home may be heating up, but your heater is not shutting off. 

There's an Issue With the Thermostat

One of the top reasons why your heater may not be shutting off is because there is a problem with your thermostat. Your thermostat may not be registering the temperature in your home correctly, and thus, it may not be shutting off. Someone may have also inadvertently raised the temperature in your home, causing it to be hotter than you desire. Check the batteries in the thermostat and the setting to see if that may be causing the issue. 

Your Heater Has a Broken Temperature Control Switch

Another common reason why your heater, furnace or HVAC system may not be shutting off despite it heating your home to your desired setting is because the unit has a broken temperature control switch. The temperature control switch controls how hot the unit heats your air. If the switch is malfunctioning, it may be heating air way too hot, causing your heater to overheat your home. The unit may not recognize there is an issue, and thus, the unit may not shut down as it should. 

The Blower Fan Motor Is Broken

The final reason why your heater may continue running when your home is already heated is because the blower fan motor is broken. The blower fan motor helps to pull outside air into the appliance, allowing the unit to heat up. If the blower fan motor is broken or malfunctioning, it may continue to pull in air when it should not. This air then processes through your heater and is blown into your home. 

If your heater is running and running and you cannot turn it off, you can attempt to turn off the heat by using your thermostat. However, if you cannot shut the heater off using the thermostat, you will manually have to shut it off. Most heaters, furnaces, and HVAC systems have an 'on' and 'off' switch. Also be sure to unplug your unit from its power source or turn off the gas, depending on if it is electric or gas-powered. Once the unit is off, call in a residential heating repair professional to inspect your unit and determine how to fix the problem.