Why Is Your Furnace Blowing Cold Air?

February 1, 2016

A furnace that blows cold air can prove frustrating, especially when the problem starts in the dead of winter. You want it fixed quickly, so it helps to narrow down the possible cause. There are several reasons the furnace in your Boynton Beach, Florida, home might start blowing cold air.

Dirty Air Filters

Your air filter removes dirt, dust, and particulates from the air to improve indoor air quality (IAQ) and protect your HVAC appliances. When it gets clogged, however, it restricts airflow, which could prevent your furnace from generating a warm flow of air. Change your air filter to see if it will fix the problem.

Faulty Thermostat

If you’ve set your thermostat incorrectly or if the thermostat’s batteries need to be replaced, your system might blow cold air. Also, make sure the device is set to “heat” instead of to “cold” as it could have accidentally been adjusted. If your thermostat is old, it is likely that it is no longer working properly.

Extinguished Pilot Light

Gas furnaces rely on pilot lights to supply the system with fuel. If the pilot light goes out, you might feel cold air streaming through the vents. While it’s easy to relight the pilots on some gas furnaces, don’t attempt this if you lack experience. Instead, give us a call so we can send out one of our experienced HVAC techs to remedy the problem.

Clogged Condensate Pumps

Over time, condensate pumps can get clogged with moisture and dirt. This will prevent the system from generating warm air. The blower will continue working, which is why you will feel cold air rather than nothing at all. This is another issue that requires the professional touch. Only an expert should fix problems with a heat pump.

You rely on your furnace to keep you warm and cozy during the winter. If it starts blowing cold air, call Preferred Air Conditioning & Mechanical, LLC today at (561) 202-1422 in Palm Beach or (772) 905-3358 in Fort Pierce. Our technicians can provide efficient HVAC service to quickly restore comfort.

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