CAN receive frame ET1 (Oil and Water temp engine) - SAE J1939 Check for CAN receive signal : (Oil temperature not in range) - P0600 Serial Communication Link
If Failure to cool in electrical system, Compressor clutch not engaging.Expansion valve not functioning. Restriction in refrigerant system. See your John Deere dealer.Faulty wiring or loose connections.Defective temperature control switch.Outside temperature too low, below 21gets warmer.Condenser is overheating. Clean condenser screens, cores and fins of condenser and radiator.