This overheat sensor w/cable for the Hydronic 4 comes complete with harness connections for the water pump, fuel pump and glow pin.
This fuel metering pump is used on both the 12 Volt Hydronic D4WSC and D5WSC. This is a 12 volt fuel pump and is located under the cover, next to the water pump
This control unit fits model 25.1917.05 Hydronic D4W. This is a 12 Volt control unit
This coolant pump fits the older 25.1917.01 Hydronic D4WSC model. This is a 12 volt motor.
This is a complete harness incorporating the overheat sensors, FMP connection, glow plug connection and water pump connection
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