Mechanics

WHY DOES THE AIR DUCT MOTORS KEEP RUNNING AND CLICKING AFTER OPENING AND CLOSING

1996 Chevrolet Cheyenne • 245,000 miles

1996 chevy k1500. Heat and ac air ducts make a clicking noise continiously after opening or closing positions
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Bkb1024
June 4, 2012.




Are you talking about the recirculation door?


Saturntech9
Jun 4, 2012.
I think so.I can feel the clicking behind blower motor.I can feel doors openong and closing, but motor acts like it wont stop trying to open or close. Does it have a limit switchor what tells it to stop?


Tiny
Bkb1024
Jun 5, 2012.
So if you change from recirculation to open air does the noise change?It sounds like you may have a broken recirculation door shaft. The recirculation door uses a actuator that depends on the resistance of the door when it reaches its stop toshut off.


Saturntech9
Jun 5, 2012.
Yes. It sounds like it changes tones and locations. Had to change fan switch. Burnt pin reversed polarity in switch


Tiny
Bkb1024
Jun 5, 2012.
Then sounds like the recirculation shaft could be broken.
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Saturntech9
Jun 5, 2012.

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