Ya Justin & Mike this system is not the easiest to diagnose.
I agree that we have to look at live data and see if the PCM is getting a request and then try to figure out why it is not.
It started working again today but, we discovered that the compressor was engaging in most modes BUT....
When it was in defrost mode...and you hit VENT button..it would not switch to Vent from Defrost position. The only way to go to Vent is from off position then go to Vent.
Then he says you probably need a new Climate control and I said ya but what else is causing this compressor not to work when requested???
This climate control unit my cost is $658 plus 12 % tax.
Is there an aftermarkert or rebuilt available anywhere?? This really is no fun.