Question about 1991 Buick Park Avenue

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Ac problems 1991 Buick Park Ave Ultra

My ac stopped getting cold, I added some AC fluid (freez on) and nothing. Feels like it wants to get cold but, no. I got dual control and the passenger side comes out warm! What can it be?

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  • deetail39 Oct 21, 2008

    I have the same problem, was told to hook it up to a machine and the shop for $60. Then another $30 for the solution to run through to find the problem.

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  • 23 Answers

May not have proper amount or restricted orfice

Posted on Oct 03, 2008

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1 Answer

Can't get headlights to work on 1991 Buick Park AVE Ultra. All parking lights work fine.


So you have tested nothing.
Headlights don't usually have relays,just a circuit breaker in the light switch.
As I suggested,no one knows your problem,you need to actually start to do something. Get to the light switch and do some testing with a meter. It is either working or it isn't. If it is good then you could use a wiring diagram to continue on,or have a shop do this for you.

Oct 05, 2010 | 1991 Buick Park Avenue

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Look under the hood...left side fuse block....#3 is the A/C.


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RE: 1991 Buick Park Ave. climate control stopped working. Pulled codes 38 & 152 per self diagnostic procedure. What do these codes mean?


IT MEANS U HAVE A LOW SYSTEM REFRIDGERENT CHARGE BECAUSE OF A LEAK AND NEED TO REPAIR IT AND HAVE THE SYSTEM RECHARGED, MOST COMMON SOURCE OF LEAK IS ac COMPRESSOR FRONT SHAFT SEAL

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Oct 03, 2008 | 1991 Buick Park Avenue

1 Answer

Relay center location


Finally located the AC primary small relay in the relay center under the right dashboard site. The relay had burned winding and only the resistor connected parallel to the coil was showing some resistance otherwise it wasn't engaging when I applied power to it. The Buick is actually 1990.

Aug 05, 2008 | 1991 Buick Park Avenue

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