Air conditioning

Tiny
TRACY742001
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 51,000 MILES
Why would cold air come out of the two passengers side vents and not the driver side when a/c in on?
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Thursday, May 12th, 2011 AT 1:54 PM

12 Replies

Tiny
DOCFIXIT
  • EXPERT
Is HVAC Automatic? If yes does MAN appear to left of AC control unit and doea it flash?
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Thursday, May 12th, 2011 AT 3:27 PM
Tiny
TRACY742001
  • MEMBER
You have to push the button "a/c" turn turn it on, I assume that when asked if MAN appear to left of A/C control you mean manual. There is not a place to for a MAN to appear or flash
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Thursday, May 12th, 2011 AT 3:54 PM
Tiny
DOCFIXIT
  • EXPERT
Will air come out in heat mode? Do all modes operate? Does air come out floor vent on drivers side in AC mode?
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Thursday, May 12th, 2011 AT 4:21 PM
Tiny
TRACY742001
  • MEMBER
Yes, air blows in heat mode, all modes operate, when control is turned to split air between floor and dash vents with a/c on air is blowing on driver and passenger side, but not cold?
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Thursday, May 12th, 2011 AT 4:44 PM
Tiny
DOCFIXIT
  • EXPERT
Has system charge been checked? Maybe low on freon the evaporator is on pass side so air would be cooler if low
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Thursday, May 12th, 2011 AT 5:24 PM
Tiny
TRACY742001
  • MEMBER
Yes system was charged and new schrader valves put two months ago, just to be clear- there is three vents in center of dash above radio, the farthest right and the one against passenger door are the only two blowing "cold " air
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Thursday, May 12th, 2011 AT 5:44 PM
Tiny
DOCFIXIT
  • EXPERT
Are there an AUTO and DUAL-ZONE buttons?
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Thursday, May 12th, 2011 AT 5:58 PM
Tiny
TRACY742001
  • MEMBER
NO AUTO and DUAL-ZONE buttons
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Thursday, May 12th, 2011 AT 6:49 PM
Tiny
WHEELS_IN_MOTION
  • MEMBER
Have your ac presures checked again you most likely have a small leak most likely at the compressor or the evaporator core
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Thursday, May 12th, 2011 AT 6:59 PM
Tiny
DOCFIXIT
  • EXPERT
All I can think of is a mode door and blend door restriction. HVAC is a sealed box the center vent is feed together don't know why right blows cool others not. Just not possible has any work be done to dash, HVAC unit? What is vent temp of vents blowing cool? When AC charged was it done by professional?
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Thursday, May 12th, 2011 AT 7:01 PM
Tiny
TRACY742001
  • MEMBER
I had a radio installed buy professional during winter, the a/c was working and abrubtly stopped blowing cold air at the end of last summer I waited through winter and this past march had intake manifold gasket replaced at a reputable service station, I also had them check a/c and was told there was no freon in system do to bad schrader valve so they replaced valves and recharged system and that when I noticed it blowing cold out of two right dash vents only. Thank for all your suggestions by the way
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Thursday, May 12th, 2011 AT 7:16 PM
Tiny
DOCFIXIT
  • EXPERT
Well suspect when radio installed duct work was dislodged
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Thursday, May 12th, 2011 AT 7:22 PM

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