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