Mechanics

VENTS BLOW HOT ON FRONT

1989 BMW 635

Air Conditioning problem
1989 BMW 635 6 cyl Two Wheel Drive Automatic 149000 miles

My 89 635csi is blowing ice cold air from the rear vents, but the front is blowing warm or ambient temperature air. Any ideas on what could cause this?
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Fastshivy
August 24, 2010.



Perhaps a stuck expansion valve in the front system. I recommend starting with checking the Freon amount and pressures, this will give us an idea of what is next.

Dr. Hagerty
Aug 24, 2010.


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