: My water heater will only heat/come on when control is
: rotated full CCW (the highest setting). The heater
: worked perfectly until recently when it was set back to
: vacation setting (low) and then returned to a normal
: (hot)setting.
: In other words, the sensing mechanism does not sense
: that the water in the heater needs to be heated and
: therefore it does not cause the heater to fire up. What
: portion of the operating control has failed
: and can it be replaced?

Sounds like a thermostat. It can be replaced. Terry

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