There should be a pressure switch close to your receiver/dryer that signals
the ecu to power the compressor. If you don't have enough gas in the system,
the ecu will not engage the compressor.
You have a leak in the system. Have it tested.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.