I have an 06 subaru forester with a little over 130k miles on it. The AC has now become intermittent and when running doesn’t blow super cold air. I had it recharged but that didn’t fix the problem. What happens is that it will run fine for like 15-20 minutes or if not hot. The clutch will start by attaching very firmly but then suddenly for no reason will disengage. It is not slipping the belt at all. I dont think that it is a matter of too much air gap because when it grabs it does so very firmly. Ideas? Also when they were charging it i noticed that the for a moment it was kicking on and off rapidly and then he did something that looked as though he might have released some and it stayed more constant?