2003 Holiday Rambler 22K miles - Dash A/C not working. Last summer in stop and go traffic it would just go to hot air - and then when we started driving it would go back to cold. A few months later it would not get cold at all so I had a shop look at it and they said I could be low on freon. They checked it and said it really wasn't low - but evacuated the system and put freon back in - and it cold for a few seconds- and then hot air. So I was told I needed a few parts to replace. So far - expansion valve, receiver/dryer and dryer was replaced and still no cold air. It holds pressure according to gauges so there are no leaks - but still no cold air. I am out of ideas and the shop charges $125/ hr so I am losing my shirt hear. I brought it home and decided to deal with it in the Spring 2013 and just put the cover on it for the winter. Well here we are Spring is here and I am ready to tackle the beast. So many suggestions I have gotten, clutch switch, relays, fuses. I checked the fuses and they are good - haven't checked the relays - but one thing is very odd...... There is NO FREON in the system at all press the schrader valve and nothing comes out and yet the A/C compressor is turning!!!! I cannot understand it it should not be. So - do I replace the compressor?? Help!!