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Heating, A/C & Refrigeration, Inc.
Quality Assured since 1998 - Family Owned & Operated

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Heating Repair FAQ: Why Is My Furnace Overheating?

You expect your furnace to provide you with heat. But you don’t want the furnace itself to get too hot so that it overheats. Just like a car or any other machine that uses engines to run, a furnace can overheat and suffer serious malfunctions that will eventually lead to a breakdown. (And, on rare occasions, fires.) We’ll look at some of the causes of a furnace overheating and what can be done to prevent it and repair the problems that it causes.

A furnace that overheats during the winter can turn into a very uncomfortable situation for you and your family, so call OASIS Heating, Air Conditioning & Refrigeration, Inc. when you need fast and effective heating repair in Fairfax, VA.

Facts About Furnace Overheating

No matter the type of fuel your furnace uses (natural gas, propane, electricity, etc.), it need motors to run the various blower fans responsible for heat exchange and the distribution of heated air through your ductwork. These motors can begin to undergo extra stress which will lead to them overheating and eventually burning out.

One of the most common reasons for motors overheating is a blocked air filter. Air filters require regular changing during the heating season so they do not become too clogged. Thick clogging will cut off the airflow, forcing the furnace to overwork to compensate. The infiltration of dust from a clogged filter will spread dirt on the motors, which can also lead to overheating.

Blocked vents will also reduce airflow. Make sure that all the vents throughout the house have easy access and aren’t obstructed by furniture or rugs. Too many blocked vents and the strain will make the furnace motors overheat.

Short-cycling is another major cause of overheating: this is when the furnace turns off early in the heating cycle. A short-cycling furnace will turn off and on repeatedly when it shouldn’t, and this puts tremendous pressure on the motors. Furnaces can short-cycle because they were incorrectly sized, from blocked vents, or malfunctioning thermostats. If short-cycling starts to affect your furnace, you need to have it professionally inspected before it overheats and burns out.

Call for Professional Repair

Furnaces are potentially hazardous if you try to repair them yourself, especially a gas furnace. If your furnace starts to overheat or suffer a breakdown because of overheating, call for professional heating repair in Fairfax, VA from OASIS Heating, Air Conditioning & Refrigeration, Inc. We have 15 years of experience working on heating and cooling systems in Northern Virginia, and we’re on call 24 hours a day.

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