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How to repair air vent operation on heat , ac system?
1999 Chevrolet S10

How to repair air vent operation on heat , ac system?

(1999 Chevrolet S10)
air flow stays in panel in all selector positions and in heat or ac mode. no defrost or floor air, heat and ac are ok
1 answer & 0 comments
Popular Answer
on January 27, 2011
Often times, air flow is controlled by vacuum. There could be a disconnected or leaking vacuum hose under the dash or under the hood. I would physically inspect for this before anything else.
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General Diagnosis
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on January 27, 2011
Often times, air flow is controlled by vacuum. There could be a disconnected or leaking vacuum hose under the dash or under the hood. I would physically inspect for this before anything else.
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