Furnace Exhaust Fan Keeps Running

If your furnace keeps running when the thermostat is off you could have an issue.

Furnace exhaust fan keeps running.

Also check that you don t have a separate fan setting that is turned on. Furnace fan still running. Well that s not normal. Make sure your thermostat fan setting is on auto not on.

About press copyright contact us creators advertise developers terms privacy policy safety how youtube works test new features press copyright contact us creators. If your furnace fan won t turn off you most likely have one of these 3 problems. When your furnace keeps running after the temperature has been reached. Another issue that could cause your furnace to heat constantly is a house that isn t weatherized properly.

The electronic limit switches are disc shaped and mounted on the exhaust pipe at the. To do this feel the air coming out of the vent with your hand. If so it s likely that you ve set your set temperature too high causing your furnace to heat continuously as it tries to reach that temperature. The furnace s fan limit switch.

Learn more about why these issues can cause your furnace to keep running even when your home is at the right temperature. If the air is warm then the blower motor is not the issue. Have a furnace fan that runs continuously. Your burners are cycling on and off it is the induced draft that is running on until killing poer if i understand you correctly.

Then turn the thermostat to a temperature that s lower than the current room temperature and wait 3 to 4 minutes. One of the limit switches is locked in the open position so the fan runs continuously. Did your furnace fan stop blowing. Exhaust fan should only run when the furnace is on.

The first thing you ll want to do is check the blower motor. If the furnace was in the middle of a heating cycle wait 3 to 4 minutes for the blower fan to stop running. However if the air is cold then you ll want to check to see if your thermostat is set to the on setting. This shuts the furnace down and prevents your thermostat from calling for more heat.

The exhaust fan turns on first a second limit switch senses the fan is on the sends a signal to the control board and the furnace turns on. If you have set your thermostat s fan setting to on the fan is going to run. A dirty furnace or air filter. One of these is an easy fix while the other will require professional assistance.

The high limit in the heat exchanger if tripped will initiate lock out and will auto reset after time or killing. There is either an electronic or a vacuum limit switch that turns the exhaust fan on when there is a call for heat. If it is set it back. Check to see whether it s your blower motor or the whole furnace system that s running non stop.