Fuel Heater: Description and Operation

OPERATION

The fuel heater is used to prevent diesel fuel from waxing during cold weather operation.

When the fuel temperature is below 45° ±8 F (7°C), the temperature sensor allows current to flow to the heater element warming the fuel. When the fuel temperature is above 75° ±8 F (24°C), the sensor stops current flow to the heater element.

Battery voltage to operate the fuel heater element is supplied from the ignition switch and through a solid stated device in the TIPM. The fuel heater element and "solid state device in TIPM" are not computer controlled. The heater element operates on 12 volts, 300 watts at 0° F (-18° C).