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1997 cadillac sls

  1. 1997 SLS heater not working.

    Cadillac Seville / Cadillac Eldorado Forum
    Can anyone help me with this? It's a hazard on cold nights, because my windshield fogs up. The heater blows out cold air when I select the "front Defrost" button, and set the thermostat to 70 degrees. The rear defroster works fine, of course, and it feels like the driver's side blows out...