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Old 03-03-2016, 08:39 PM   #1
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Knocking when turning off AC.

So today when I turned off my AC I heard a knocking from behind the dash. Turn it back on it stops. Anyone have an idea on what this could be? [YOUTUBE]https://youtu.be/RtcuBDUYoxQ[/YOUTUBE]


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Old 03-03-2016, 08:45 PM   #2
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Plenum door actuator. Sounds like something is sticking and the actuator is freaking out.
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Old 03-03-2016, 09:36 PM   #3
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My car started making the same sound about three months ago. However, whatever is stuck is stuck in the opposite position for me because it happens when I turn the A/C on and when I turn the blower motor off. I am surprised that the clicking sound has not faded over time as the gears, or whatever is making the noise, wear out.

I plan to tear apart my console once the warmer weather comes.
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