There is a long list of things that can go wrong with a furnace. One of the worst, of course, comes in the form of the furnace not blowing hot air. After all, its purpose is to function as a heater to keep your Newark, Delaware, home warm and cozy. If your furnace is constantly blowing cold air throughout your home, there are several components in the heating system you can check. After checking these components, if the problem still persists, you’ll need to contact a professional HVAC specialist.

Keep reading to learn what to do if the furnace in your home is blowing cold air.

Check the Air Filter

The first thing to check is the air filter. A dirty filter can prevent the furnace from blowing hot air by blocking air from flowing through the unit’s heat exchanger. This can lead to the furnace overheating. When this happens, the limit switch will signal the burners to shut off, and as a result, it will blow cold air. To keep this from happening, change the air filter at least once a month.

Check the Thermostat

The next thing to check if your furnace is blowing cold is the thermostat. The problem could be something as simple as the thermostat being set to "on" instead of "auto." When this happens, the system’s fan will constantly run, but it won’t always blow hot air. Once the thermostat reads that the home is at your desired temperature, the heating element will turn off but leave the fan running. By setting the thermostat to "auto," the furnace will only run when blowing hot air.

Check the Pilot Light

Lastly, check the pilot light. If it lights but doesn’t stay lit, this means the problem is related to the thermocouple. If it doesn’t light at all, it could be that the gas valve switch is turned to "off." Or it could be that it’s time to replace the furnace.

If you’re in need of quality furnace repair services, contact our team of professional HVAC specialists at William G. Day Company at 302-219-5591.

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