2000 Chevy Venture load Nocking

Tiny
SWRKINGDAD
  • MEMBER
  • 2000 CHEVROLET VENTURE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 103,000 MILES
My AC makes a Nocking noise when we turn it on when we shut it off everything is fine. It is on a 2000 chevy venture. What could be the cause of this?
Sunday, July 19th, 2009 AT 6:13 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Noise from the compressor usually means the compressor is on its way out. But noise can also be caused by cross-contaminated refrigerant (operating pressure too high), air in the system or the wrong type of compressor lubricant.

Noise can also be caused by hoses or other parts rattling against other components in the engine compartment. Check the routing of the hoses, support brackets, etc, to pinpoint the noise.
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Sunday, July 19th, 2009 AT 6:38 PM

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