Intermittent Overheating Electric water heater


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Old 09-15-13, 10:31 AM
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Intermittent Overheating Electric water heater

Okay as the title says the water heater just decides to bump up the temp about 25 degrees. I can hit the breaker and reset and it will be good for a while then do it again. I have flushed the tank- less than a 1/4 cup of filter sediment came out( I use provectr). I checked ohms top and bottom and for grounds(checked every combination for both elements)-everything is spot on. I checked the top t-stat- when on(240 v) the bottom is off(0v) and when the bottom is on(240v) the top t-stat is off(0v). Is this still a thermostat problem? Both t-stats to replace? Thanks.
 
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Old 09-15-13, 11:14 AM
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If you've taken the wires off the elements and confirmed that you have absolutely no resistance to ground then it might be a thermostat issue. It could also be a lack of physical contact between the stat and the tank.
 
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Old 09-15-13, 12:03 PM
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Absolutely no resistance to ground on both elements but I will check to see if t-stats are loose in any way. Thanks.
 
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Old 09-15-13, 01:24 PM
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Do you mean infinite resistance to ground? No resistance to ground denotes a short circuit and would definitely cause the elements to be energized.
 
 

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