My compressor doesn't seem to kick on. I saw info on obd in the IHKA unit, it doesn't seem to apply to this one, same with under bonnet relay check for compressor clutch coil. I have an appt. at dealer next week, if I can sort any of this on my own I'd probably be a lot happier. I also noticed last night that when I turned the car off the cooling fan continued to run, as it sometimes does, but seemed much louder.