The part(s) or condition(s) listed below for the symptom Air conditioner fan not working are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
Try turning the blade by hand. If the blade does not turn freely, this indicates that the motor bearings are worn out. If the motor bearings are worn out, replace the motor. If the blade turns freely, test the incoming power to the fan motor. If power is getting to the fan motor, but the motor won’t run, this also indicates that the motor is defective and should be replaced.
The blower motor may be burned out or worn out. First, check the fan blades. If the blades don’t spin freely, replace the blower motor. Second, make sure that power is getting to the blower motor. If the blower motor is getting power but the motor still won’t run, replace it. It is not possible to repair the blower motor; if it is defective, you must replace it.