ok i have a major issue, everytime i turn on my heater on anything other than floor the ac compressor causes a nasty vibration and sounds like crap... it started out as intermitently and now it is any time the heater is on... please if anyone can help me find out what the problem is this would be greatly appreciated... the only thing i can think of is the compressor clutch is going out... but not for sure... thanks any advice will help.