Intermittent Air Con.
 

The Air conditioning (AC) will provide nice cool air intermittently. It may work for part of the journey then all of a sudden starts blowing what seems to be less cool almost warm air. The AC system was re-gassed less than a year ago however, if it was low on gas surely the system would not be intermittent would stop working all together ?
I am concerned a mechanical fault is to blame, perhaps the compressor ?