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

  • Tiny
  • bkb1024
  • 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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Monday, June 4th, 2012 AT 11:53 PM

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  • Tiny
  • saturntech9
  • Expert
  • 29,444 posts

Are you talking about the recirculation door?

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Monday, June 4th, 2012 AT 11:57 PM
  • Tiny
  • bkb1024
  • Member

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?

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Tuesday, June 5th, 2012 AT 12:57 AM
  • Tiny
  • saturntech9
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  • 29,444 posts

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.

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Tuesday, June 5th, 2012 AT 1:13 AM
  • Tiny
  • bkb1024
  • Member

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

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Tuesday, June 5th, 2012 AT 1:20 AM
  • Tiny
  • saturntech9
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  • 29,444 posts

Then sounds like the recirculation shaft could be broken.

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Tuesday, June 5th, 2012 AT 1:57 AM

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