a/c compressor only engages when engine is under load, for example, uphill and over 3000 rpm

Asked by msaddy May 13, 2014 at 04:51 PM about the 1993 Buick Park Avenue FWD

Question type: Maintenance & Repair

I have a 1993 Buick Park Avenue, 3.8, 4 speed automatic. The a/c compressor will
come on, but usually only when there is a load on the engine, for example, going uphill,
rpms go over 3000, and I get cold air. On the downhill side, or at idle, the a/c clutch
does not seem to engage. Mechanic says I am a little low on Freon, but that even
when jumpering the power and the ground, clutch does not engage.Thanks for your
help. I don't want to put $700 for a new compressor into a $700 car!

2 Answers
1,195

Jim answered 10 years ago

If you are low on refrigerant then the low pressure switch will not close and the clutch will not engage. It is the sensor on the side of the receiver/dryer. Remove the connector and jump it with a paper clip. Then see if the clutch engages. If it does either you are low on refrigerant or the switch is bad. You can change the switch without losing Freon.

1 people found this helpful.
Mark helpful

msaddy answered 10 years ago

Thank you, Jim, We tried the jumper, and clutch did not engage. Can you suggest another step? Thanks!

Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Buick Park Avenue Questions

CarGurus Experts

  • #1
    jateen29
    Reputation
    3,210
  • #2
    Joseph King
    Reputation
    2,060
  • #3
    Jim Campbell
    Reputation
    1,120
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Buick Regal
4 Great Deals out of 31 listings starting at $5,990
Used Chevrolet Impala
12 Great Deals out of 113 listings starting at $5,595
Used Buick Century
1 listing
Used Cadillac DeVille
8 listings
Used Lincoln Town Car
6 listings
Used Buick Riviera
1 listing
Used Mercedes-Benz E-Class
46 Great Deals out of 505 listings starting at $5,700
Used Mercury Grand Marquis
1 listing
Used Ford Crown Victoria
5 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.