what is the thumping noise coming from the right side of the motor when i use the heater controls

Asked by rickrock Mar 21, 2013 at 10:56 PM about the 2000 Ford Ranger XLT Extended Cab 4WD SB

Question type: General

i seem to get a thumping noise coming from the right side of the motor when i use the defrost in the morning after the truck has warmed up  and when i shut it off the thumping noise starts after ive shut it off

1 Answer


You could be hearing a mode control or blend motor in the heater unit that is telegraphing the sound. If the engine is shut off nothing is moving in it but the heat/AC system stays active for a few minutes after shut down.

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