New Holland 19343 – DCU: Coolant control valve mechanically defective blocked open

The coolant control valve is mechanically defective and is blocked open, which may cause improper coolant flow and potential overheating. The source also mentions a short circuit high in the P20A3 Vent valve (Reductant Purge Control Valve).

1. 1

   Coolant control valve

2. 2

   P20A3 Vent valve (Reductant Purge Control Valve)

1. 1

   Inspect

   Visually inspect the coolant control valve for mechanical damage or obstruction that may be causing it to remain open.

2. 2

   Test

   Test the P20A3 Vent valve (Reductant Purge Control Valve) for a short circuit high, following the service manual procedures.

3. 3

   Replace

   If the coolant control valve is found to be defective, replace it with a compatible component.