AC problems - ZR-1 Net Registry Forums

mhull · 08-25-2007

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!

gbrtng · 08-27-2007

Quote:

Originally Posted by mhull

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!

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 ??

mhull · 08-27-2007

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!

zr1don · 08-29-2007

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).

08-25-2007	#1
mhull Join Date: Apr 2007 Location: New York Posts: 31	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!

08-27-2007	#3
mhull Join Date: Apr 2007 Location: New York Posts: 31	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!

08-29-2007	#4
zr1don Join Date: Jan 2006 Location: Temecula, CA Posts: 92	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).