Thread: AC issue

Having an ac issue. Low reads 45psi, high reads 100psi, changed compressor, dryer, hi\low ports, did not do the orifice, seems to be a pain so I figured I could get away with not changing it, or the manifold hose going to the compressor, car has 190,000, the ac stopped working about 100,000 miles ago, never really used it, but now I would like to have working ac. I know my gauges work I just did a complete ac system, compressor, hoses, orifice on my 95 F250. The system also only had 100psi before the compressor change. This was one reason I changed it.

Sorry, 02 Grand Prix 3.1. The compressor runs but does not get cold, no change on the highway, didnt check the equal pressure, I can check that tomorrow. I was just curious there might be a blockage or bad orifice not letting the compressor build pressure.

I figured that with the blocked orifice, but with the variable displacement compressor, I was not sure if the blockage would lower the pressure, I do feel just a little coolness, but not much more than the outside temperature. I do alot of Ford systems with the single displacement compressors, and as I said earlier I just did my Ford truck with no issues, put everything in, charged it, ice cold. This is the first time I am working with a variable displacement compressor, and am trying to learn and diagnose why the compressor is running and not getting cold. I am still trying to find if the compressor manifold has anything to do with it.

Found the issue. Changed orifice, very little change, new low side and high side ports were bad, and my gauges were bad, high side, gauge would not read unless I pushed down on the adapter, the low side would only let a trickle of freon in, and the needle barely moved. New ports and different gauges, high now reads around 225, and the low 40, and blows cold air.

Thanks. We almost never think about failing equipment. We tend to blame the stuff we are working on.