Why Isn’t My Heater Turning Off?

October 20, 2021
Heater Troubleshooting in Hayden, ID

It is frustrating when your heater won’t turn off. There are a few issues that can cause this situation, and three of them related to your thermostat.

Incorrect Thermostat Setting

Check your thermostat’s settings. The fan can be set to “ON” and “AUTO.” Make sure it’s set to “AUTO” so the fan only runs when the heater is on. It will otherwise run nonstop. Note this doesn’t mean your heater is running, just the fan blower.

Malfunctioning Thermostat

Thermostats can break just like any other electronic device. This can be caused by faulty wiring, a broken heat sensor or a broken switch. You may be able to get it repaired. Otherwise, it needs to be replaced. Fortunately, new thermostats have more features than ever, which makes them wise investments.

At Border Sheet Metal & Heating in Hayden, ID, our technicians repair and replace thermostats. We also carry advanced programmable and smart thermostats.

Temperature Set Too High

Ensure that you don’t have the thermostat set at too high a temperature. Your heater may not be able to reach this temperature and so it will run constantly. Set the temperature no higher than 78 degrees.

Dirty Air Filter

A dirty air filter restricts airflow, which can cause your heater to run nonstop. Check the air filter and replace it if it’s dirty. The problem should resolve within an hour.

Damaged Blower Motor

A constantly running heater can be a sign the blower motor is damaged. As this isn’t a problem you can fix yourself, call an HVAC company to inspect your heating system.

Leaky Ducts

Your ducts may have developed leaks over time, or they may have been incorrectly installed. With too many leaks, a lot of the warm air your heater produces is lost in unconditioned spaces. You can have an HVAC company seal your ducts.

Border Sheet Metal & Heating repairs, tunes up and installs both heaters and air conditioners. We can also handle duct cleaning, indoor air quality, water heaters, solar, geothermal, gas fireplaces, garage heaters and new construction. Please call today to find out more.

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