If your furnace seems to be lit and functioning properly, but you aren’t receiving any air flow, then you have a problem with your furnace blower, also called an air handler. The furnace air handler is the part responsible for actually circulating air throughout the house, while the rest of the furnace is devoted to heating. If your air handler stops working, the furnace is essentially useless, as it is unable to deliver its heat to the rest of the house. Let’s take a look at the problems that could be preventing your air handler from working properly.
Broken Fan Belt
The fan belt is a rubber loop that connects the air handler motor to the fan that circulates the air. When the motor turns on, it rotates the fan belt, which in turn rotates the fan. All three of these parts need to work together for the air handler to do its job. Over years of stress, however, the fan belt will begin to stretch out. Cracks will form in the rubber of the belt, increasing the amount of friction between it and the motor. This friction can create a loud squealing sound, which can sometimes be heard across the house through the ductwork. If the fan belt is not replaced, it will eventually break, severing the connection between the motor and the fan. This essentially prevents the fan from turning and disables the air handler.
Burned Out Motor
The motor in an air handler is extremely vulnerable to wear and tear, due to the level of stress that it’s constantly under during operation. To prevent the motor from burning out, it is equipped with bearings that are lubricated to decrease the resistance on the motor. However, these bearings can occasionally dry out, increasing the resistance on the motor. This often manifests as a loud grinding noise coming from the furnace. If the bearings aren’t fixed, the motor will overheat and burn out, once again crippling the entire air handler.
If your furnace blower isn’t working, call Shaw’s Air Conditioning. We provide heating repair throughout Clovis.