2007 Chevy Tahoe Air Conditioning Not Working

Reply Subscribe

Thread Tools

Search this Thread

August 13th, 2012, 11:01 AM

#21

rnorman4

CF Junior Member

Thread Starter

Join Date: Aug 2011

Posts: 31

Likes: 0

Received 0 Likes on 0 Posts

R12??

R12?? I did not say R12 anywhere in the post. HC-12a (AKA 12a) is what I would be filling the system with if it were low. If have not added anything to the system as yet.

Reply Like

August 13th, 2012, 8:31 PM

#22

73shark

Administrator

Join Date: Apr 2006

Location: KC, MO area

Posts: 10,916

Likes: 43

Received 158 Likes on 156 Posts

I think he means R134a as that's what he had in the picture anyway. There will be 12V at the compressor clutch if there's a call for cooling and neither the lo or hi pressure cutouts are engaged.

If no R134a has ever been added to the system, then it can't be overcharged. So that leaves either an undercharge or electrical/control problem.

Edit: Oops, didn't see post #21. Why would you put something other than R134a in the system?

Last edited by 73shark; August 13th, 2012 at 8:42 PM. Reason: Added info