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A/C unit sometimes blow air when set to front vents.

Tiny
GREERMAC
  • MEMBER
  • 2002 GMC ENVOY
  • 240,000 MILES
When set to off, their is a noise(clicking, whining) sound.
There have been times when I don't have the unit on and it still makes
a whining sound. It seems to be coming from the speed cluster section.
when in use, at the max fan speed, the a/c blows no air from the set front vents.
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Sunday, October 9th, 2011 AT 8:50 PM

1 Reply

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Check the relays for the system. Make sure the grounds are solid. When it is set to vent or heater, does the high speed work? If not, Suspect the fan control switch in the dash.
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Sunday, October 9th, 2011 AT 9:17 PM

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