Question about Rheem MR105245 Marathon Electric Water Heater 105 Gal
Check 240 circuit breaker.
Open top cover on water heater and push in ECO red reset button.
If reset button will not reset, then replace thermostat.
If reset is not tripped out, then either upper thermostat is bad, upper element is bad, or water heater might be getting 120V instead of 240V.
If you have some hot water, then best suspect is lower element.
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Posted on May 26, 2011
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Posted on Jan 02, 2017
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