A/C Problem: Doesn't blow cold air thru dash vents - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-20-2007, 09:33 PM   #1
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Default A/C Problem: Doesn't blow cold air thru dash vents

The blower system does not blow any hot or cold air through the dash vents. The air flow is only directed towards the windshield and floor vents no matter what temperature or vent position is selected.

Other than that, it works fine (ie: the air gets cold).

Any ideas?
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Old 05-20-2007, 10:27 PM   #2
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The first thing we need to know is:

Do you have manual (*****) or ECC (digital) climate control? We can't answer you until we know that.
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Old 05-20-2007, 11:27 PM   #3
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Hi, Willwren.

It is the ECC.

BF
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Old 05-20-2007, 11:52 PM   #4
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Look for a vacuum leak. Start at the connections on the vacuum canister between the windshield wiper motor and the maxifuse relay center. Black plastic. Underneath, you'll find the connections.

If you find no problems there, you need to pull the hushpanel from the right front and inspect all the vacuum lines coming from and going to the HVAC controller. All different colors. You'll see them.

The door that directs where the air goes is controlled by vacuum on the ECC-equipped cars.

EDIT. Just realized you're a 98. I think your vac canister is in one or the other front fender.
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Old 05-21-2007, 12:03 AM   #5
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Thx for the clues.

I'll check it out tomorrow.

BF
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