I haven't had AC in my 95 since I bought it. The compressor had went out so the previous owner removed it and put the old compressor and lines in a box. I bought a new Denso compressor, new seal kit and belt. I put new seals in both ends of the lines, vacuumed it out, charged with argon and left it set for 30 min to test for leaks. I even sprayed soapy water around all the fittings to watch for bubbles and nothing. It didn't leak even a smidge on the gauge so filled it with 134a. The AC worked perfect that evening and my drive to and from work the next day. Last night i went to come home from work and its blowing hot. The compressor is on so there's enough freon to keep it working but not produce any cold air. I didn't replace the dryer or condenser but may have to go down that road. I'm just puzzled that the argon didn't leak at all unless its just a super slow leak. I need to put my gauges back on tonight and see how much freon leaked out but does anyone have any opinions on where else to check?