furnace fan repair

Why Your Furnace Fan Is Running in Boulder, MT

December 22, 2022

After your Boulder, MT, home’s furnace shuts off, it’s normal for the blower fan to run for a few minutes to distribute the heat and cool down the internal system. If you’ve noticed that the fan continues to run, there are several possible reasons why it refuses to shut off.

Thermostat Switch Isn’t on the Right Setting

One of the most common reasons why the furnace fan continues to run is the setting on the thermostat. If someone has switched the fan setting to “on” instead of “auto,” the fan will run constantly.

Thermostat or Its Wiring Is Faulty

Another possible issue that has to do with the thermostat is that it’s faulty. The thermostat’s wiring may be damaged.

When you suspect the problem with the fan is the thermostat, have it checked out. A repair professional may need to replace the thermostat or change the wiring. You can prevent problems in the future by having your thermostat and its wiring checked during each scheduled preventive maintenance visit.

Fan’s Limit Switch Isn’t Set in the Right Mode

After ruling out problems with the thermostat, another possible reason the furnace’s fan refuses to shut off is the limit switch. If you or someone else has set the limit switch to manual mode, it won’t automatically regulate the temperatures until it’s set to auto mode.

After finding the switch on the outside of the furnace, check to make sure it’s set in the proper mode. If the limit switch is in the right mode and the fan is still running, the switch may be malfunctioning.

If you can’t shut off the furnace’s fan with the simple flip of a switch, there may be an underlying issue with the furnace or thermostat that needs repairing. Contact us today at Superior Heating & Cooling, Inc. to schedule a service call.

Image provided by iStock

You May Also Like

Should My Heat Pump Keep Tripping the Breaker?

Should My Heat Pump Keep Tripping the Breaker?

A circuit breaker detects a power surge and disconnects the power supply to prevent a fire breakout. A heat pump is one of the appliances in your house that can trip the circuit breaker. Find out below why your heat pump is tripping your breaker in Townsend, MT. Your...

What Is That Sound Coming from My Furnace in Clancy, MT?

What Is That Sound Coming from My Furnace in Clancy, MT?

Hearing strange noises from your furnace should concern you, as it signals issues within your system. Here, we highlight furnace sounds you must never ignore, based on our decades of experience in Clancy, MT. Grinding A grinding noise during operation signals dry...

4 Tips for Using Heat Pumps More Efficiently in Clancy, MT

4 Tips for Using Heat Pumps More Efficiently in Clancy, MT

The efficiency of heat pumps depends on several factors, including the quality of installation, regular maintenance, and the age of the system. But there are some measures that home and business owners can take to ensure that their heat pump is running as efficiently...

call to schedule an appointment today

Pin It on Pinterest

Compliance Settings
Increase Font Size
Grayscale
Simplified Font
Underline Links
Highlight Links
Reset
Close