AC in the GN is BACK

[Little6pack]

I am so Stoked that my AC is working again after a 2 year hiatus.
Tonight Pronto & myself came back from a local cruise night.
It was so muggy out that I wished i had my AC.

We decided to go jiggle the switch on the Accumulator? Evaporator? While turing the AC to MAX.. The Compressor started clicking back to life.

YEEE HA What a way to start my vacation

 

[mar86gn]

Coooool man!!!!

 

[Geoff87]

I refuse to drive a car without A/C!

 

[David65]

If it blows cold, you might have the same problem I had. Bad pressure cycling switch on the side of the accumulator. p/n 3041336 I think, ~$16 fixed it.

Thanks TurboJim

David

 

[Pronto]

David, can you just back that switch out of the accumulator withou losing the refigerant?

 

[David65]

Yup, I PM'd TurboJim about it to see if there was a valve behind it, there was. I loosened the switch a bit, then spun it off real fast. It sounded like just a tiny bit of freon came out. Didn't seem to make a difference in the temp.

http://www.gnttype.org/techarea/airconditioning/ac101/ac101.html

David

 

[Pronto]

Cool Pun intended

 

[Little6pack]

Originally posted by David65
If it blows cold, you might have the same problem I had. Bad pressure cycling switch on the side of the accumulator. p/n 3041336 I think, ~$16 fixed it.

Thanks TurboJim

David

turbo jim did that switch replacement require drain down of the
Freon?
Was that part to be had at buick dealer? or any place like NAPA.

 

[87 Pete]

Originally posted by littlesixsteve
turbo jim did that switch replacement require drain down of the
Freon?
Was that part to be had at buick dealer? or any place like NAPA.

Try disconnecting the harness to the pressure switch, and put the A/C controls in the car to max. With the car running, jump the connector on the harness, and the compressor should start.

If you are getting cold air inside the car, it is likely the switch is bad.

If you are not getting cold air in the car, you are probably low on Freon or have a leak.

You can remove the switch, without losing all the freon, there is a shrader valve behind it, but a very small amount will come out. The manual says to use a new o-ring, and lube with refrigerant oil if replacing the switch. I would think most auto parts stores carry it, it's common on most 80's GM cars. Also, I think you are only supposed to torque it to 8 ft-lbs, the threads on it are plastic.

Good luck!

Pete