A/C TURNING ITSELF FROM AC

Tiny
KADILLACKAT
  • MEMBER
  • 1996 CADILLAC DEVILLE
  • V8
  • AWD
  • AUTOMATIC
  • 148 MILES
The ac in my 1996 Cadillac randomly switches from AC to Econ. The battery has to be disconnected and then reconnected for ac to work again. Would like to know what is wrong and how I can fix it. Thank you.
Thursday, June 2nd, 2011 AT 6:58 AM

2 Replies

Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
THERE is a pressure problem. Most likely on the hi side pressure line sensors. They need to be checked
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Thursday, June 2nd, 2011 AT 10:27 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
That merely means that the control module has sensed a problem and shut the system down. It then records a code to identify the problem. When you disconnect the battery, you are merely erasing the diagnostic history and starting over which is not the right thing to do. It was shut down to protect the system. This can happen for many different reasons. The most common is simply being low on refrigerant but it needs to be diagnosed properly.
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Thursday, June 2nd, 2011 AT 12:02 PM

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