Hey everyone, I have a 2004 Sierra 1500 crew. On Friday I replaced the compressor, orfice tube, and accumulator. I went and got it filled up on Saturday. The tech was saying that the low side was reading high roughly 65psi and the high side was fairly normal for the temp (94* outside), but I don't remember the psi for the high that he told me.

So today I also replaced the low pressure switch and fan clutch.

With a thermometer in a vent, it will be blowing air at 70* at idle and 60* while driving with the temp set for 60*. Vent temps should be around 40* or so.

Everything that was replaced is brand new, so I'm trying to figure out what is going on, because I could really use some AC right now. Haha

The only items that I haven't replaced is the condenser, evaporator (which I really do not want to do), the blend doors, and the actual digital AC controls. Does anyone have any info about this?

 

the blender door could be letting some hot air mix with the cold air

 

I would check pressures again. I've seen, after a compressor failure a brand new orifice tube get clogged two or three times before there was no more debris coming through the line.

 

A clogged orifice causes low suction (low side) pressure. Causes of high suction pressure include high air temperature air blowing through evaporator, and bad valves in compressor.