Air Handler Blower Motor Not Working

Sometimes age is the biggest threat to an hvac system.

Air handler blower motor not working.

A shorted thermostat wire can cause this too but it is very uncommon. Dirt and grime can accumulate around the motor and prevent it from venting itself causing heat to build up over time. If you have a belt driven blower motor fan and the fan is not blowing any air through the vents then it is possible that the belt may have become worn over time moved out of place or become damaged. The blower motor starts turning fan blades that circulate cold air.

You would probably need a new control board if the relay on the control board is welded closed. You can solve this problem by hiring a professional to service your motor. The blower motor is crucial to the proper function and operation of your hvac system. They usually stick open never sending the signal to the motor.

This is probably the most common cause. It could be a bad relay control board run capacitor or the blower motor itself. It could also be the blower wheel. The contacts inside the relay go bad.

Your system probably has a manual fan on switch on the thermostat or if not there may be a fan on push pull switch right on the fan limit switch in the air handler. Blower motor failure the next most common problem that can occur with an air handler is a failure of a blower motor whether it be the blower motor or something else that causes the blower motor to fail. This is much easier and less expensive to repair than a motor going bad. Most fans are energized by a fan relay.

In this hvac troubleshooting video i go over the top 10 reasons why the blower fan motor is not starting in a furnace air handler or packaged unit for air. When the home s thermostat detects that the living space is warmer than its programmed temperature level a cooling cycle begins. Many hvac related calls are due to the blower motor not working. A control board relay where the relay contacts are welded shut can cause the blower to run continuously too.

Your blower motor may overheat because of a number of reasons.