Auto Air Conditioning & Heater Repair: 1979 Cadillac Deville, cadillac deville, defroster

Question
    The defroster in my 1979 Cadillac Deville does not work. I would like to know what is causing this problem and how to fix it.

Answer
Please ELABORATE in more detail other than  The defroster in my 1979 Cadillac Deville does not work.

What heppens when you switch to defrost.

Doe the air flow come out of the correct vents or where does it come out?


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