Why does my furnace run non stop when the thermostat is on?
ON makes your furnace’s blower run non-stop but AUTO will tell your furnace’s blower to run only when heat is being produced, so it should shut off once your home reaches the desired temperature. Note: If your thermostat fan is set to ON, your furnace isn’t actually running non-stop—just the blower fan is.
What should I do if my furnace won’t shut off?
This means the furnace blower is pushing out air, whether it’s heated or not, through the vents 24/7. Your thermostat fan setting is set to ON. Turn it to AUTO and see if that helps. Thermostat or fan relay switch problem – Turn the thermostat to OFF.
Why is my furnace blower fan not turning off?
Limit Switch Issue | Furnace Blower Fan Wont Turn Off If the furnace overheats, then a limit switch will open. That will cause the burners or heat source to shut off and the fan to run until the limit switch closes again. In some cases, the limit switch will stick open, and this will cause the fan to run continuously.
How long does it take for Furnace Fan to stop blowing?
This shuts the furnace down and prevents your thermostat from calling for more heat. If the furnace was in the middle of a heating cycle, wait 3 to 4 minutes for the blower fan to stop running. Did your furnace fan stop blowing?
Why is my furnace not kicking on?
There are many reasons why your furnace might not be kicking on. Some of the most common explanations include: Troubles with your thermostat. Your thermostat is responsible for telling your furnace when to turn on and off. So if your thermostat is not set or working properly,…
Why wont my furnace turn off?
If your furnace keeps blowing hot air and won’t stop, the furnace burners aren’t turning off. Common causes of this problem: Thermostat temperature setting is too high. The furnace will run constantly to keep up on a cold night. Air filter is too dirty.
How do you replace an air conditioner thermostat?
Recycle your old outdated air conditioning thermostats and replace them with digital display thermostats for more accurate controls. Turn the power off to the area of the house where the thermostat is located at the main circuit breaker. Locate an electrical outlet near the thermostat that is on the same circuit.
What does a thermostat on a furnace do?
A thermostat is wired to a furnace or air conditioner unit and acts as a switch to turn the unit on and off automatically, based on the thermostat’s temperature setting and/or programmed time schedule.
