How to Troubleshoot my Chevy C3500 AC System
Hi all,
I have a 2000 Chevy C3500. I am having probelms with my AC. I noticed the problem awhile back. My compressor would not engage. The AC system worked fine last summer and now that it is getting hot again I can not get it to come on. I have already tested / done the following;
Jumpered relay to engage compressor - it does come on when I do this.
Add refrigerant to the system thinking it was the low pressure safety switch, this did not do anything and now I am afraid I have too much refrigerant and I may slug the compressor. I have commercial / residential grade gauges but they do not fit on the auto style connections. I need to get adaptors for this.
Checked the power across the relay coil - 12vdc and replaced the realy
checked the power at the cylinder (what I believe is the low pressure switch) 12vdc
checked the power at the compressor (connection on top) nothing unless I jumper the relay.
I tried to find a wiring diagram but I have not had any luck on the internet.
Any help you can offer will be great
Thanks
Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.