hey all,
I have an 96 ram 1500 4x4, the A/C is not working. I found the compressor was not engaging (the clutch was bad) so I replaced the compressor unit. I refilled the system, but still no A/C. the compressor clutch engages pulls down the press about 10 psi then the press goes back up to where it started and the compressor clutch is still engaged. I don't have cool air in the cab at all, and the receiver dose not get cool to touch. I know the low pressure switch is working. any help/ ideas?

 

I know on my 98 when I took it into a garage to have my truck looked at for the a/c that there was a leak at the top of the unit that they couldn't get to without taking apart the dash. This does not sound like your issue, but just trying to give something to you.

 

unfortunately its holding pressure for two days, and when I vacuumed the system I was holding at 22" over night. The other thing I noticed was the line going from the compressor to the coils was extremely hot and after the coils is cool to the touch and the reservoir is warm.

I'm almost at the point to take it to some one to have the system checked out.

 

what side pressure are you looking at the high side should be 150psi low side should be 40psi it sounds like the high side may be blocked if it is really hot

 

Did you charge with the correct amount? Undercharged systems will have the compressor working but accumulator wont get cold.

Your supposed pull vacuum at 29.9 (or close to it) in order to boil moisture off. And if you had the system open for too long, the accumulator desiccant will saturate and wont dry the refrigerant/oil.

The line from the compressor to the condenser should be hot, its a high pressure line.

It would also be more helpful if you could get high/low side pressure readings with a good gauge set.

 

I know it dose not have the right amount in it but I can't get it to pull any more, its running about 70% load. I only had the system open for about 20 min just long enough to change the compressor out. I don't have a gage set that reads both sides, I need to get a set eventually

 

have you been filling the low side with liquid?