I don't know when it started, but I noticed today that my A/C compressor is running continuously (doesn't cycle). Aux fan is also running all the time. System is fully charged with 134a and blows nice cold air in the cabin. If I switch the CCU to a non-AC setting, the compressor does turn off (as it should).

I've read a number of the posts where people can't get their A/C compressor to turn ON (often related to the KLIMA), but I haven't found any posts where it won't turn OFF.

Anyone have any suggestions or experience?

The only thing I can suspect is the Overload Protection Relay was recently replaced by the dealer. If I pull it the compressor does stop running, but I can't figure out if that really means anything.