'05 Hemi Quad Cab. 1 week ago, my A/C unit started blowing warm air. I'd turn it off and back on and it would work. Today, it finally quit. Started blowing hot air (hotter than outside air temp). Clutch on compressor starts kicks in and spins for five to ten sec's, then cuts off. This continues to repeat itself. I bought some refrigerant and was about to add, but gauges show psi getting no lower than 65#'s and then kicks up to 150#'s as the compressor kicks off. Doesn't appear to be any leaks anywhere. Do I need a new compressor?