2000 Buick Park Avenue Intermittent AC

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19NIGHTRIDER55
  • MEMBER
  • 1 POST
I am having problems with my AC. It will work for a day or so, then it will stop. Eventually it will start working again. For example, as I am driving, it will be on and blowing hot air, but then it will start blowing cold air. I took the car to the Dealer. They had my vehicle for three days. They replaced the relay and charged me $212.00. The same day that I picked up the car, the problem returned. I called the Dealer and they said it might be my computer and to bring it back in. I don't think they have the experts to work this problem. Other forums I researched said to check the high pressure switch. What do you think is wrong and what should I do?
Jul 1, 2006 at 1:42 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,658 POSTS
Hello,

This kind of problem usually leads to the compressor clutch coil which short out all the time. If the compressor is getting power but not working this is your problem.

Here is a couple of guides that will help you get the problem fixed. Test at the compressor

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/replace-air-conditioner-compressor

and

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Please let us know what happens.

Cheers, Ken

Jul 20, 2017 at 6:30 AM

Suggested Repair

Test for power at the AC compressor. If it has power but does not engage, the compressor clutch coil is likely shorting; replace the compressor and recharge the system.

Conversation Summary

The owner of a 2000 Buick Park Avenue reports intermittent AC that blows hot air and then cold. A dealer replaced a relay without fixing it and later suggested the computer. The expert says a shorted compressor clutch coil is the usual cause and advises testing power at the compressor, replacing the compressor if it has power but does not work, and recharging the system.

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