I have a 1996 Dodge Ram 2500 Diesel. The AC has not worked since I bought the truck, I was told it needed a new compressor. The clutch on the old compressor was not engaging at all, so I bought a remanufactured compressor from AutoZone. Now it will not take any freon. I added ester oil and it took some of that, but it will not take any freon at all. I tried to add it at the low pressure point and at the high one, but it will still not take any freon. The AC blows hot air, it is not cool at all. I'm very frustrated as the temps in the daytime are 100 degrees and it's a little warm to drive around with the windows down. I'm not sure what else to look at or try changing- any ideas? Thanks!!

Has the system been "Pumped Down" with a vacuum pump? It should have been drawn down to 25 inches of mercury, after the other compressor was installed, then freon added with a manifold gauge or by weight.