Ac blows cool on Max ac :(

[Pwrcummins]

Where is the low pressure switch located at? I wanna replace it to rule that out.

 

[Mdub707]

I'd be interested to see what fixes this. I just had studs done on my truck and I know the A/C was evacuated and refilled. Now I have the same issue as you. Seems like it takes forever to get really cold and only works on max A/C. Seems like it fluctuates between mildly cold and just a little colder, back and forth. When I put it on regular A/C it seems to barely work at all.

I had a low pressure gauge from one of those cheap refill canisters from my gf's escape, and hooked it up... showed I was in the red as well.

 

[Pwrcummins]

Had a friend of mine of works at a body shop do an ac service on my truck and now it blows colder than ever.