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My boiler will not fire up the pilot light is on, the thermostat clicks when asking for heat but boiler will not go on. What could be the problem ?

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Best case, the gas selector switch is set to the pilot position. Rotate it to the full open position to allow the boiler to fire. If it is already in the normal operating position, you will probably need to replace the gas valve.

Posted on Oct 04, 2009

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