Originally Posted by imnprsd
Right... You are probably right. That being the case what do you recommend for the OP to do relative to his chassis (dash) AC problem?
From Jim's comments, it sounds like he's pretty knowledgeable since he wants to get access to the compressor, but, for the record, here are my thoughts.
1. Is there sufficient airflow? If not, it could be the fan and/or the airflow doors or another glitch in the airflow system
2. Is the compressor is running (ie. Is the belt OK)?
3. Is there an accessible sight glass, if so, what does it show? https://autoacrepair1.com/auto-a-c-s...ass-diagnosis/
Unless 1. or 2. is the problem, I've usually ended up going to an automotive A/C shop. Other than 1. or 2., or a bad compressor, in my experience, the system needs to be checked for leaks and recharged. Most recently, my 2005, Ford E350 had a pinhole leak in one of the refrigerant lines and it took two trips to the shop for them to find it after their initial recharge leaked out over the next few days.