A/C compressor will not engage


Asked by Weatherly Aug 10, 2014 at 04:17 PM about the 1992 Oldsmobile Ninety-Eight 4 Dr Regency Elite Sedan

Question type: Maintenance & Repair

A/C system had a freon leak. Replaced accumulator nd o-rings added 3 ozs. of PAG oil.  pulled vacume for 90 minutes.  Added on can of R-134A, startted engine turn on climated control and compressor did not engage.  Checked low pressurre switch (jumped terminals) and compressor did not engaage.  Any ideas?

4 Answers


Loss of compressor voltage, compressor clutch coil circuit open.

1 out of 1 people think this is helpful.

Bad compressor relay? HTH. -Jim


Gents, thanks for your relies. I think first I need to determine if there is 12 volts going to the compressor. There are two sensors on the back of this compressor (High pressure and ???). I need to rule these our as causing the no start condition. If there is power and the sensors are good, I will run a jumper to the clutch to determine if this items has failed, if good then I'll move to the electronics. Is this a good path or have you seen this condition. Thanks for you help. Doug.


Sounds like a good plan of attack, Doug. The other switch on the back of the compressor is most likely the low pressure cut out. HTH. -Jim

Your Answer

Add photo

Related Questions

Looking for a Used Ninety-Eight in your area?
CarGurus has 44 nationwide Ninety-Eight listings and the tools to find you a great deal.

Search Oldsmobile Ninety-Eight Questions

Oldsmobile Ninety-Eight Experts

#1 FordNut
Reputation 110
#2 Travis Willard
Travis Willard
Reputation 90
#2 Jae Wilson
Jae Wilson
Reputation 90
View All

Related Models For Sale

Used Buick LeSabre"
61 Great Deals out of 2,758 listings starting at $1,450
Used Chevrolet Caprice"
151 listings starting at $10,470
Used Lincoln Town Car"
62 Great Deals out of 2,332 listings starting at $1,700
Used Oldsmobile Eighty-Eight Royale"
53 listings starting at $1,988
Used Pontiac Grand Prix"
84 Great Deals out of 4,216 listings starting at $800
Used Buick Park Avenue"
13 Great Deals out of 610 listings starting at $1,995
Used Chevrolet Camaro"
401 Great Deals out of 30,110 listings starting at $2,950
Used Buick Riviera"
137 listings
Used Buick Regal"
121 Great Deals out of 8,619 listings starting at $1,800