Guessing if you have power to the compressor, you're saying it's not working, but that's a broad stroke. Dig deeper!Hi, I am new to Bimmerfest and a noob. I use my E90 in UK where you don't use Air con every day. My aircon didn't work so I topped up gas, but still doesn't work. I checked the connector on top of compressor and it has 12V so apparently compressor is not working. One of my mates got an e46 compressor. I am wondering if compressor in 318i E46 and 320i E90 interchangeable? Is it interchangeable with any other model?