Why is My Gas Furnace Blowing Cold Air?

Heating

As the temps change, the more you feel the colder air gusting outside. And … inside your home? If your gas furnace is blowing cold air and putting a chill to your the Main Line home, it’s time to contact O'Brien Heating & Air Conditioning. Occasionally a lack of warm air from your gas furnace means a major repair, but often it can be an easy fix. Here are a few of the more common reasons your gas furnace may be blowing cold air instead of keeping your home toasty.

Your furnace might be overheating

If you haven’t had routine maintenance done on your gas furnace lately and you’ve forgotten to change your air filter, both could be the reason why your furnace is blowing colder air. A dirty air filter can stop air from flowing freely through your furnace. If this occurs, the furnace might overheat and cause the burner to shut down.

Your pilot light may have gone out

It’s probable a lack of warm air from your gas furnace can be credited to something as simple as a pilot light that’s gone out. It’s possible, specifically with older furnaces, for a draft to put out a pilot light. Other factors when it comes to an extinguished pilot light are defective gas valves or a faulty thermocouple.

Your furnace is dirty

Just as a dirty air filter can cause problems for your gas furnace, so can other furnace components if they aren’t correctly cleaned. A dirty gas burner or flame sensor could cause your furnace to struggle to stay lit and leave you in the cold.

Your ducts may not be properly sealed

If your ducts aren’t properly sealed or if they have any cracks or holes in them, you could be losing a lot of heated air before it even reaches the vents throughout the home.

No matter what the reason for the problem is, O'Brien Heating & Air Conditioning in the Main Line can help you get your gas furnace up and operating at an efficient level again. We can also help keep it running with routine, preventive maintenance. Contact us at 610-257-7035 or schedule an appointment with us online and we’ll be there to help.

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