AC not working, 92 Bonneville

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Alpha One - 24 Jun 2005 14:55 GMT

The AC in my 92 Bonneville is not cooling at all. The clutch does not
engage. Fuses OK, fan working. The pressure is well into the red on the low
pressure side, but the compressor in not working of course. About a month
ago I charged the
system after I let it finish emptying completely with R-124a which it was
using before. It was leaking through the valve, I replaced it. Any idea what
it may be?

Thank you.

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tom - 24 Jun 2005 23:00 GMT

you need the system evacuated and leak tested. the refrigerant that came
in it was R-12, not R124-A. the newer refrigerant is R134-A

> The AC in my 92 Bonneville is not cooling at all. The clutch does not
> engage. Fuses OK, fan working. The pressure is well into the red on the low
[quoted text clipped - 5 lines]
>
> Thank you.

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Alpha One - 24 Jun 2005 23:50 GMT

The system was changed to R134A a few years ago by an AC shop.

I checked three switches and I think they should be either open or closed. I
tested both states on each and it does not cause the clutch to engage. I am
not sure if this is a way of testing them.

If I apply a voltage directly to the clutch it will engage and the AC works,
cooling the car.

I wonder if it is the thermostatic switch. How can I access it?
Thank yopu,

Tony

> you need the system evacuated and leak tested. the refrigerant that came
> in it was R-12, not R124-A. the newer refrigerant is R134-A
[quoted text clipped - 9 lines]
>>
>> Thank you.

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