heater works fine on the electric
element when I'm plugged into shore power
, but if I'm out and need to run the engine
for anything more than in/out of port, the overtemp relief opens. I basically need to turn off the pressure water
pump, wait for the heater to cool down, then everything is ok again.
Is there supposed to be a thermostat in the cooling
water heat exchanger
part of the water heater, that might be broken? If not, does anyone know of how I could fix? I'm thinking of putting a valve in the engine coolant
line to the heat exchanger
that I can shut if I motor
for more than 30 minutes.