Why wont heat or ac blow air when i turn on ? All the little lights work but when i want heat or ac , no air comes out . What could be wrong ? Could it be a fuse ?
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Could be a blown fuse, but fuses don’t blow for no reason. Most likely a faulty blower motor, which is the thing that drives the fan that creates air flow. If the motor shorts out it will blow the fuse. But this could also be a wiring problem or a fault in the control unit