Mechanics

AC ONLY BLOWS ON LOW

1996 Cadillac Deville • 150,000 miles

Ac blows on low just fine but when I turn it up it will blow for a second then either cut back to low or wont blow at all. Usually works ok at nigh tand sometimes after the car has been running for a while.
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DUKE2991
May 28, 2012.




It is an automatic system and the blower control is in the programmer. Get a shop with a scan tool to check the system for you to verify a programmer failure.

Roy

ASEMaster6371
May 28, 2012.
This car uses an electronic blower speed controller which, in this case is built into the blower. The programmer sends the signal to it but the blower is a much more common failure.
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Wrenchtech
May 28, 2012.

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