Originally Posted by Tyson2busy
My air con compressor will come on every once in a while, then cut out. So I know it works, but what could be causing this?
Don't know what year model Audi..90..Cabriolet..but they work pretty much the same.
Could be low on refrigerant..compressor comes on and the low side pressures drop below the threshold of the low pressure switch..then the compressor kicks off..low side pressure comes back up..compressor come back on line and engages.
An over charged system will do it too. High side pressure switch kicks the compressor out when the high side pressures go up.
Some A/C gauges and an low side adapter (yellow jacket #19153 ACME FEMx13mm) on the compressor port will tell the story.