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Serving Franklin and Washington Counties since 2012





Serving Franklin and Washington Counties since 2012


Premier HVAC Services Blog

Why Is My Furnace Blowing Cool Air?


During a cold winter day, the last thing you need in your home is a second air conditioner. So if your furnace suddenly starts blowing cool air, it is definitely a cause for concern and something you’ll want to have changed immediately.

There are a number of reasons a furnace might blow out cool air. We have outlined several of them below. Please don’t try a deeper diagnosis of the problem on your own if the solution isn’t a simple one. Instead, call for professionals.

Why the Cold Air?

There are several reasons a furnace might stop doing its job and end up doing the reverse of it.

Trouble With the Thermostat

Sometimes the problem isn’t with the furnace itself, but rather with the thermostat. If your thermostat is malfunctioning, it might be misreading indoor temperatures, or it may not be properly regulating the temperature in the furnace.

We recommend checking the thermostat to see if its set to “AUTO” rather than “ON.” When it is set to “ON,” the fan will blow continuously, even if the furnace isn’t heating the air. Room temperature air will come from the vents in this case.

A Clogged Air Filter

A clogged air filter can cause significant problems if ignored, one of which is a lack of heat. A dirty air filter restricts airflow into a furnace, causing it to overheat. When this happens, the system will shut down as a safety measure. The fan, however, will continue to blow air to cool down the heat exchanger. Changing a clogged air filter might just be the way to restore heat to your home.

Broken Heating Elements

This only applies to electric furnaces. When any of the electrical elements responsible for heating the air break, you can expect cooler air from the furnace instead. A professional can inspect each element to pinpoint the source of the problem and repair it accordingly. You want any broken heating elements repaired as quickly as possible.

Ductwork Breaches

When there is a breach in the ductwork, warm air will leak from the ventilation system. Additionally, a breach will cause air from other parts of the house, most of it colder than the air from the furnace, to enter the system, causing a drop in temperature. Fortunately, a certified HVAC professional can locate and seal any ductwork breaches.

Professional Repairs Are a Must!

If your furnace needs repairs, do not hesitate to call a certified HVAC professional for help. Only a professional has the tools, training, and expertise to safely and correctly handle the complex needs of your system, the first time around.

When it comes to your comfort and budget, don’t take any risks. Never trust heating services like these to any old amateur who’s willing to repair the system for a questionably cheap price. Instead, call our team of experts for heating repair in Chambersburg, PA.

To learn more about our comprehensive heating services, or to schedule your repairs, contact the team at Premier HVAC Services today. The experience you deserve.

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