Ac noises
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Joined: Oct 2018
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From: Indianapolis
Ac noises
1997 coupe. Auto. 138k miles.
When I turn my ac on or off there is a loud clunk noise. Is this normal?
also when I have it and low to middle settings there is a rattle but when it’s on full blast there is no rattle. Any idea what that is?
When I turn my ac on or off there is a loud clunk noise. Is this normal?
also when I have it and low to middle settings there is a rattle but when it’s on full blast there is no rattle. Any idea what that is?
Last edited by JLT73; Aug 7, 2019 at 04:58 PM.
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Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Pull the blower motor out and inspect the squirrel cage rotor for trash. Also put your hand inside the air box and feel for the evaporator coil and make sure that there isn't any trash or lint in there.
While the blower is out,, operate the AC and see if you still hear the noise (CLUNK)
Two three things happen when you turn the AC ON. The compressor clutch engages, the blower motor turns on and the Air Box Damper doors get vacuum to position them selves to the correct settings and move.
The clunk could be any of the three or even something I have failed to mention.
Bill
While the blower is out,, operate the AC and see if you still hear the noise (CLUNK)
Two three things happen when you turn the AC ON. The compressor clutch engages, the blower motor turns on and the Air Box Damper doors get vacuum to position them selves to the correct settings and move.
The clunk could be any of the three or even something I have failed to mention.
Bill
