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1994 Cadillac DeVille Question: A/c won't blow inside care, only through defrost. Where do I cnnect hose to blow



, Miami, FL, July 25, 2011, 14:24

Need to know where to connect host to get a/c to blow inside.

3 Answers
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  • Answer #1

    donaldautorepair from Donald Auto Repair, July 25, 2011, 15:26

    There probably is a vacuum leak causing the air to blow defrost only. The leak is usually under the hood and is a small hose.

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  • Answer #2

    Visitor, July 28, 2011, 18:32

    I had the same problem on a 97 STS. The system on my car works with 2 small rubber vacuum hoses connected near the air conditioner receiver/dryer to hard plastic tubes. The rubber vacuum hoses had dry rotted and were leaking. The 2 short rubber vacuum hoses go near the firewall and connect to a small diameter hard plastic tube that runs through the firewall to the control unit inside the dash... I replaced the 2 short rubber vacuum hoses and the air flows correctly.

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  • Answer #3

    Aventura Auto Specialist (8 Answers) , Aventura, FL - (305) 748-2072
    philippe July 30, 2011, 17:00

    make sure that you have vacum suplie from the engine to the hose that going in the a/c if not you may have a broking hose

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