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Re: Boiler trouble....
most likely the gas valve or thermal coupling.
the problem is, i dont know how to test either, the cheaper way would be to try the thermal coupling first, about ten bucks.
but usually, if the pilot light stays on, the thermal coupling is ok.
another consideration would be the age of the gas heater. if a gas valve is over $100, which it is, a new heater is two and change. it might be time to replace the unit.
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