i have a 2006 ram diesel. the ac has quit working a few times and i have taken it in to the dealer. they have replaced the compressor, drier, h-valve, and recharged it several times. they tell me something is causing the pressure release valve on the compressor to release the freon at times. they have no idea why it keeps doing this. it last anywhere from a couple of weeks to 3-4 months. any ideas or direction for me to go? They want another $550.00 to try the fan clutch assembly on it.

 

Do you hear the fan cycling with the AC?

When I turn on my AC, I hear the fan cycle on & off, seemingly with the compressor cycling. If you don't hear the fan, I'd say the fan clutch has a problem.

Tony