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HEATER FIRES UP AND SHUTS DOWN AFTER 5 MINUTES

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  • gary miller
    gary miller May 11, 2010

    you need to give a little more info,, what kind of heater, what the name brand is, if possible the year does it have electronic ignitor, or standing piliot, there is to much open in this question,, is it tankless or direct vent or power vent or conventinal water heater,,but from what it has up there I would have to say th gas valve or the flue,, the gas valve could be shutting down, or if the flue pipe is blocked it could cause the gas valve to shut down, this would turn the unit off,, need more info

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Try turning up temp control if that doesnt help, your thermo coupling is probably bad replace that first. also check gas line the shut off valve may have gotten partilaly closed the stem on the valve should be in a line with pipe not perpendicular

Posted on Jul 08, 2009

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