FIXED

So the problem was that I recently had the car on the chassis lift to change the oil. I don't know for what reason. The rear air suspension stopped working and the rear sagged to the bottom. Checked the fuse in the back. #79 (7.5) and #87 (30). Went underneather and checked if there was any physical problem to the plastic sensor. Everything was good. So I went to my indy shop and got the ecu resetted. Viola! The compressor started pumping again.

Solution: If there isn't any leaks. Always try to reset first.