Re: A/C in defrost

From: Brett Miller (bamiller@csupomona.edu)
Date: Thu Dec 04 1997 - 10:59:14 EST


Some Ford vehicles do this as well. According to my buddy at Ford it has
the added benefit of using the A/C system to dry the air going onto the
windshield help the process to run quicker.

Brett Miller
Cal Poly Pomona Formula Racing Team
1974 Porsche 914 2.0
Used to have a 94 Dakota
-----Original Message-----

>CC does this on all its vehicles. Has been since the mid/early 70's.
>They claim it keeps the A/C system lubricated and causes fewer
>compressor failures. On the old pushbutton control types, you could
>pull the button back out with your fingers, and it would prevent the
>compressor from running in defrost. Only way I know to keep it from
>running in defrost now is to splice a switch into the line to the
>compressor, or unplug it at the compressor.

>>I've been reading my 1995 Dakota Owner's Manual, and was surprised to
>>read (on page 69) that (in an AC equipped truck) the air conditioning
>>compressor comes on automatically when the air-direction pushbutton is
>>set on Defrost. "To improve fuel economy, leave in Defrost only when
>>necessary," states the manual. Hope this tid-bit is helpful, Greg
>>Schaller<<

>Azie



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