Why Is My Furnace Running Constantly in Cashiers, NC?

Even in places far colder than Cashiers, NC, furnaces shouldn’t run constantly. If they do, it’s usually a signal that something is wrong. Here, you can learn some reasons why your furnace might run constantly.

“On” Instead of “Auto”

The “Auto” setting means that the furnace and it’s blower fan will automatically turn on and off as it adjusts the temperature in your home to the setting on the thermostat. “On” means that the furnace’s fan will run constantly. So, it’s a good idea to check your thermostat to make sure that it’s set correctly.

Dirty Air Filter

A dirty filter restricts the airflow. In addition to regular, professional preventive maintenance, you need to change the air filter every two to three months.

Low airflow from a clogged filter makes the furnace work harder to get the inside of your home to the correct temperature. That means it could run much longer than usual to reach that temperature.

Malfunctioning Limit Switch

This switch controls the burners and the fan. Generally, once the combustion chamber is at an appropriate temperature, the limit switch will engage the blower fan to circulate the warm air through the vents. Sometimes, something goes wrong with the switch, and the fan could continue to run and require repair by an HVAC technician.

Faulty Thermostat

Thermostat problems range from simply needing new batteries to having defective wires inside or difficulty connecting to the furnace. If you have a programmable thermostat, smart or otherwise, then there could also be something amiss with the programming that tells the furnace to keep running when it shouldn’t.

With years of experience in the HVAC industry, we have the qualifications to complete any HVAC work you need for your always-running furnace. If you need furnace repair in Cashiers, NC, then call us at All Service Heating & Air Conditioning, Inc. to set up an appointment.

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