Espar D7W

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Temperature sensor

This sensor is used to measure coolant temperature. Use caution when changing sensor and lubricate o-ring. This sensor is also used in the older D7W model 25.1666.01

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Series resistor - 24 volt

The series resistor is used in the 24 volt D7W model 25.1667.01 heater

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Glow plug screen

This glow plug screen is modified to help reduce carbon build up. It should be changed when you change the glow plug

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Control unit - D7W

This control unit is used on the 25.1807.05 - D7W - 12V heater only. It will not work with the older 25.1666.01 models

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Flame sensor

This flame sensor is used with the D7W coolant heater model 25.1807.05. It will not work with the 15.1666 models

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Seal, overheat safety switch

This seal is used between the heat exchanger casing and the thermal safety cut out switch (overheat switch) on the D7W.

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Temperature sensor

This temperature sensor threads into the outer casing of the heater and monitors coolant temp. Use caution when removing. Sometimes sensor is difficult to remove.

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