Climate Control System 1991 Cadillac Brougham

1991 CADILLAC
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CARL REYNOLDS
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  • 1 POST
The fan runs at constant speed, will not turn off with car. Must un plug fan to make it stop running. Climate control system does not make any differience what it is set at. ie Auto Hi Auto Low, Auto all the same. What could be the problem?
Feb 12, 2007 at 11:31 AM
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2CARPRO JACK
  • ✓ASE Certified Mechanic
  • 11,533 POSTS
  • ASE Certified Mechanic
Either the ECC (Electronic Climate Control Unit) or the Blower Control Unit. I would probably start with the Blower Control Unit, It is basically the old fan speed resistor
Feb 12, 2007 at 1:56 PM
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