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I own a 1985 Crown Victoria and had the same problem. It started small. It only fogged up when I would stop and leave the engine running. The problem got worse and we discovered the heater core had small pinholes in it and that the fluid was leaking into the heating system and actually putting vaporized steam mixed with the vaporized antifreese into the car and causing the window to gof up. It got so bad that it was actually putting a steam cloud into the cab of the car. You should have your heater core checked first.

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17y ago

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