Why Does My Furnace Fan Keep Running?
A furnace fan usually runs only when it is in the middle of a heating cycle. But if you notice that your furnace fan has been running continuously even when the furnace isn’t heating, then that is not a favorable sign. A range of problems might happen, such as using the incorrect thermostat fan setting, a shorted wire at the thermostat, or the fan limit switch.
This article will walk through the troubleshooting steps you can take up if you face furnace fan issues. You will also figure out when you might have to call up the professionals at the HVAC repair Bradenton FL for assistance.
The Reasons and Solutions For The Issue
The Thermostat Settings
First of all, you must check if the settings are not adjusted so that they are calling for continuous heat or forcing the fan of the furnace to blow non-stop. For this, you must adjust the temperature of the thermostat according to the temperature of your room. When you do this, the furnace shuts down and prevents the thermostat from calling off more heat. If the furnace is working between the heating cycle, you need to wait for 4-5 minutes for the blower fan to stop.
If the blower fan stops completely, you may have fixed the set temperature too high, causing the furnace to heat up continuously as it tries to reach that temperature. Furthermore, if your house isn’t insulated correctly, cold air might enter and hot air to escape.
The Fan Limit Switch Settings
There is a separate button for the fan of the furnace; if the button is set to ON, the fan will continue to run regardless of whether the furnace is in the mode of heating or not. Secondly, any problem with the fan limit switch button might also arise the issue of your fan running continuously.
This switch is located directly under the hood of the furnace, and it functions to control the turning on and off of the blower. The problems with the fan limit switch include a faulty switch that has been either damaged or has its wire shorted, or the switch has been set to manual override.
In the second problem, if the switch has been set to manual override, all you have to do is pull out the button and reset your fan limit switch to auto. This will automatically turn the fan on once the heat is produced and off when the cycle is complete.
Finally, even after trying these troubleshooting methods, your fan continues to malfunction, so it is essential to call up professional technicians for your furnace. At air comfort services, we provide you with experienced technicians who will visit your home, inspect your system thoroughly, and resolve the issue in no time. Give us a chance to serve you, and we ensure you won’t be disappointed. Contact us at 941-355-4444.