AC SYSTEM MAKES A NOSIE WHEN SYSTEM IS TURNED OFF. FLAPPER VALVE NOT SEATING? on 2000 Acura TL

When AC system is turned off. you hear a sound inside the car below dash. I can see what appears to be a valve / switch moving back and forth as if its stuck on not seating creating a noise. Sounds like plastic on plastic thumping?

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1 answer 5 comments
ITS PROBABLY A BLEND DOOR ACTUATOR THAT HAS BAD GEARS AND CANNOT CLOSE OR OPEN PROPERLY
Not sure, BUT I electrically disconnected and reconnected and its working now! Is the blend door inside the vent system? Sounds like it is something that directs air flow?
yes and it may work now but it will do it again
Its doing it again! How do you fix it? How much?
it depends on which one it is on the labor and the part im not sure. i know chevy's are like 276.00 ea if that helps. call acura and ask for the price on the part.
thanks on line its 131.00