23 Voltage supply 3 - Coolant control valve and reverting valve (UB3) electrical - Short circuit to Ground UB3 - P20A2 Vent valve (Reductant Purge Control Valve) - Short circuit low
Voltage supply 3 -Coolant control valve and reverting valve (UB3) electrical - Open circuit to B3 - P20A0 Vent valve (Reductant Purge Control Valve) -open circuit
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.