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08-26-2012, 12:26 AM
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AO Smith Hot water heater won't stay lit
Brand: -other- Age: 5 - 10 years
I have an AO Smith hot water heater that won't stay lit. The electric element heats up and glows red, then the gas ignites. It stays ignited for about 3 seconds, then shuts off again. This cycle repeats itself about 5 times, then it gives up.
This is a closed system, at least that's what I call it. There is an electric vent system that clicks on for the exhaust gas. Someone told me it could be the high temperature air switch. I wasn't sure if it could be a thermocouple, much like you have on a gas furnace. Any thoughts would be appreciated. Regards, Matt Ads By Google 
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