Low pressure switch open for cumulative 60 seconds (no consecutive requirement)
Decelerator (STD cab) Position potentiometer voltage is too low
Master clutch is not calibrated
Aux 3rd Raise solenoid failed open or short circuit.
Low pressure switch open for > 1 minute
Master clutch is not calibrated
If Air conditioning does not work,possible causes are blown fuse, faulty wiring or loose connections, fxan belt loose or slipping or defective switch or defective compressor clutch.