Ac not blowing cold

Double post

 

First get a set of gauges that measure both the high and low side of your ac system not those cheapo ones from walmart that only measure low pressure. A little trick I learned is spray down your condensor and see if your ac starts blowing cold, its good to do this trick with gauges hooked up so you can see the line pressure drop. If it does you are not getting enough air through to remove the heat.

 

What make and model of truck are you working on?