AC problems
 

The air conditioning in my ZR-1 decided to take the day off today. Anyone familiar with re-charging the system? Since it was working recently, could it be a bad compressor unit? Thanks!

Re: AC problems
 

Could be several things - does the compressor run ? If not, it's probably low on freon. R12 or R134A ? If the compressor does run there could be a problem with the mixing door inside the cabin. Are there any codes set ??

Re: AC problems
 

Could be several things - does the compressor run ? If not, it's probably low on freon. R12 or R134A ? If the compressor does run there could be a problem with the mixing door inside the cabin. Are there any codes set ??

I'm guessing it is R12 freon since it is a 91 Z. The air worked today but when it was 92 degrees out it didn't work. There weren't any diagnostic codes listed and it seems as though the compressor works. Would a faulty thermostat(within the air unit) be a possibility? I am not familiar with the mixing door inside the cabin. I would assume that it is in a similar location to where the cabin filter would be found? I generally don't even use the air but when the boss(wife) comes along, she wants it on. Thanks for your assistance!

Re: AC problems
 

If it is low on freon the low pressure switch will be open (no continuity). If you have an FSM, find the sensor, unplug the connector & check for continuity. If there is continuity, it could be the air conditioner controller under the dash. It can be reset by removing battery power & reconnecting. My 1990 A/C quit, I checked the low pressure switch & it was good, I removed battery power to reset the controller & it has been working scince (about two months).