i have a problem with my a/c. when i switch it on, the clutch engages for only a couple of seconds and stop then start up again in a couple of seconds. this continues until i switch it off. what seems to be the problem. i read from other post that it may be the superheat switch and that i can bypass this without a problem. should i bypass the switch, if so, where the heck is is. if not, then what else should i do or what else is wrong?