I went camping last weekend and had an issue with hot water heater. It fired up fine when i first turned it on, but after a few hours the DIS light would be on. If i turned it off and on again, it would heat up again, but would never kick back on...
I replaced the tstat and ECO today. No change. The hot water heater lights the first time it is turned on but one it goes out will not relight. I do here a humming noise from the control box. I guess bthat could be my issue. Any other sug...