Since furnaces are the most common kind of heating  system in the country, they also happen to have the most common heating problems. This isn’t to say that furnaces experience a greater incidence of problems, simply that furnace problems are the most common by virtue of the systems’ popularity. With that popularity in mind, let’s take a look at 3 common furnace repairs.

Though more modern furnaces have begun using electric intermittent ignition systems, the traditional gas-powered pilot light is still in widespread use. A gas-powered pilot light is controlled by a part called a “thermocouple,” which regulates when to feed gas to the flame. When the pilot flame is lit, the thermocouple produces an electrical current that opens the gas valve and feeds the flame. When the pilot light goes out, the thermocouple’s electrical current stops and the gas valve closes as a safety measure. A faulty thermocouple is one that has lost the ability to keep the gas valve open, smothering the flame for want of fuel. The usual fix for this is to replace the thermocouple completely.

Short-cycling is the name for when your furnace won’t stop turning itself on and off over and over again. It is caused by the furnace’s interaction with a part called the “limit switch.” The limit switch is there to make sure the furnace doesn’t overheat and damage itself. When it detects an internal furnace temperature that is too high, it shuts down the furnace as a safety measure. This doesn’t solve the source of the overheating problem, though, and as soon as the furnace starts up again it will repeat the same cycle. A professional will need to isolate the cause of the overheating problem to solve the short-cycling.

Duct leaks are an especially insidious problem, because they are almost impossible for a homeowner to detect but can cause thousands of dollars of wasted energy. Almost 30% of an average furnace’s heat is lost to leaks in the ducts, according to the US Department of Energy. The only way to solve this is to have a professional examine and seal the home’s ductwork.

If you’re having furnace problems, call Clean Air Act. We provide furnace repair throughout Beavercreek.

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