I have a 2004 Ford Expedition , when i first turn the blower/heater on there is a loud noice underneath the car. If the heater/blower is set on 1 before i start the car its ok .
yes the blower motor bushings are worn causing the motor armature to go in a frenzy ,a new unit isn't too costly
Had the same problem and it was a bad motor. Replace it.
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