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Old 07-13-2008, 01:17 PM
beaulieub's Avatar
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Join Date: Jun 2006
Location: Alton Bay, NH / Yuma, AZ
Posts: 203
Doesn't "Defrost" Setting automatically start the AC Compressor?

my 87 300D doesn't. Actually, when I have the ac on at the vents and cooling fine, if I switch to defrost, the AC goes off or at least the window gets hit with warm air. My Recir. button also is not functioning. Any ideas?

Bert _ NH

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Old 07-13-2008, 03:11 PM
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Defrost does run the a/c but also puts heat to the windshield regardless of the temp wheel setting. The a/c runs to dry the air so that it can defog the windshield more effectively than just hot muggy air.

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