I have a 2005 9760sts that we have fought the air conditioner on for over 5 years. Started off working intermittently depending in direction in the field and if 1 or 2 people in cab. Worked better in mornings. New compressor on few years back. Worked all last season and first day out of shed this year. Now it won't blow cold and the heat doesn't work either. Both low and high pressure switch are working and the compressor is not engaging. Does anyone know of a circuit or a fuse or had this problem before?