If you put that Energy Smart water heater on a timer, it still works, but doesn't draw any current for the hours it is not running. If you fish your hand around the cover, you'll find a warm spot toward the right side where most of your continuous 20W is converting from electrical energy to heat energy. I have the Whirlpool version with that brain board, and mine has been living on a timer for over a year. I also downgraded the heating elements in mine after reading numerous reviews indicating the boards (more likely the relays) were not holding up well on the Whirlpool version. I've never had an issue with the brain board in 5+ years.
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