Tuesday, July 23, 2013

What is a electro-thermal heater controller?

This system was used in 1982 to 1984 6.2 liter diesel engines. This electro-thermal heater controller threads into the water jacket, which senses engine coolant pressure and contains some tiny electric heaters to help assist three bi metal switches. Inside the controller there are four electric heaters that alternately heat up and cool down, that cause the bi metal switches to  open and close the glow plug relay circuit.


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