Are you wondering why your furnace keeps running all the time? When winter hits Bremerton and surrounding areas, you can expect your home’s furnace to run quite a bit. But if your furnace keeps running when your home is already warm, there might be a problem. The cause could be one of these issues:
- Thermostat’s settings or wiring
- The furnace’s fan limit switch
- A dirty furnace or air filter
Learn more about why these problems can cause your furnace to keep running even after your home is at a comfortable temperature.
Your Thermostat’s Settings or Wiring
One of these can be fixed easily, but the other calls for professional help. If your thermostat’s fan is set to “On,” the fan will run all the time, regardless of temperature. You can easily fix this by switching it to “Auto.” If the wiring in your thermostat has shorted out, the thermostat can no longer communicate with your furnace. To fix the issue, a trained HVAC professional can replace the wiring.
Your Furnace’s Fan Limit Switch
The fan limit switch is what tells the blower when to turn on and off. If the switch becomes faulty, it’s not going to automate the process the way it should and could make your furnace keep running. This switch is located just inside the furnace panel, so it’s easy to check.
Dirty Furnace or Air Filter
Not sure what is causing it? Our HVAC troubleshooting guide matches common symptoms to the safe checks and the right repair.
When your furnace’s air filter becomes full of dust and debris, it can cause the unit to overheat. When this happens, the fan will kick on in an effort to cool it down. To avoid this, replace the filter. If the old one has no size on it, here’s how to find the right air filter size. If it’s a reusable model, make sure to keep it clean. You can also remove the panel from your furnace and vacuum out the dust.
Get Help From Home Comfort Alliance
If your furnace keeps running after these checks, Home Comfort Alliance can find the cause. Our NATE-certified technicians handle furnace repair across the Puget Sound, including Bremerton and Kitsap County, and our phones are answered 24/7. If the house has no heat on a cold night, see emergency furnace repair. Home Comfort Alliance has served Puget Sound homeowners since 1977.