Furnaces are the most common type of home heating system in the country. This means that furnace problems also happen to be the most common type of home heating problem. Since it is likely that you either own or will own a furnace at some point during your life, it pays to know a bit about the kind of repair needs furnaces can run into. Let’s examine some of them.
Broken Fan Belt
The fan belt is a rubber loop that connects the air handler motor to the fan. When the motor turns on, it uses the fan belt to actually turn the fan and circulate the air. Over time, the fan belt stretches and cracks from the stress of regular usage. Eventually, it can snap and render the fan unable to turn. You can tell that the fan belt is failing by the squealing sound that happens when the furnace turns on. If your furnace is on, but air doesn’t seem to be circulating, it is possible that the fan belt has already broken.
Faulty Pilot Light
The pilot light is a small, continuous flame responsible for lighting the burners and starting the furnace. Every once in a while, the pilot light may blow out and have to be relit. If the pilot light is refusing to stay lit, however, you may have a more serious problem. In older furnaces, the likely culprit is the thermocouple. The thermocouple is the part that senses when the pilot light is lit, and allows fuel to be supplied to it to keep it burning. A faulty thermocouple is one that has lost the ability to sense the pilot light, and so never opens the gas line to supply fuel to it.
Furnaces can overheat for any number of reasons, but the most common cause is actually the one most homeowners never expect. When the furnace’s air filter is not replaced often enough, it can become clogged with dust and debris, blocking air flow into the furnace. This traps heat inside the furnace itself, causing it to overheat and shut down as a safety measure. You can tell that your furnace is overheating when it starts turning itself on and off rapidly throughout the day, which is called “short-cycling.”
If you are experiencing furnace problems, contact AAction Air. We provide heating repair throughout Bluffton.