It’s cold this time of year, and you certainly want your furnace to work properly in your Waynesville, North Carolina, home. If your furnace seems to be working fine but only cold air is blowing out, don’t worry. Check out these troubleshooting tips to see if they help to resolve the issue:

Incorrect Thermostat Settings

You have turned your furnace on for the first time this winter. The fan is blowing and everything sounds fine, but only cold air is coming out.

One of the first things to check is your thermostat settings. Make sure the thermostat is set to “auto” rather than “on.” The furnace will blow on a constant basis when set to “on,” but warm air will come out only during the heating cycle. Setting the thermostat to “auto” could solve this issue.

Pilot Light or Ignition Problems

If there’s no heat blowing into your home and you have a gas furnace, the pilot light could be out. You could also be out of fuel, or the gas supply valve may not be in the correct position. The pilot light, ignition and burner systems are tricky, and if you feel at all uncomfortable checking on this, call us immediately.

Regular maintenance on your furnace should prevent any issues with the ignition and burner systems. Investing in a maintenance plan with us will ensure your heating system is properly maintained in a timely manner.

Overheating Furnace

As a safety feature, your furnace has a device called a limit switch. If the furnace overheats, the limit switch will shut the furnace down. If it’s blowing hot air, then cold air, and finally stops working altogether, the limit switch has probably turned the furnace off.

One of the main culprits for a poorly running heating system is a dirty air filter. Dirty filters restrict airflow, causing the system to work harder to deliver warm air. Changing your filter may help. We recommend filter changes about once per month during the peak heating season.

Is your furnace malfunctioning or only blowing cold air? Call Gentry Heating, Inc. today at 828-581-4045 to diagnose and repair the issue.

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