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I have an AO Smith hot water heater model (GCV 40 100) that was mfg 10/08/2004 but was not installed/used until 2007. The pilot extinguishes when the water reaches temp and shuts off. It can easily be lighted and remains lit until the next cycle. I have removed the burner assembly and cleaned, but same condition exists. There are a series of parts that make up the burner assembly but I don't want to start replacing if this is not the problem. Any help would be appreciated.
Stonerod
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