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Old 11-01-2010, 04:04 PM   #1
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furnace burners ignite for 30 or 40 sec then shut off


I just replaced the smart valve(sv9541) on my heil furnace under the advice of a hvac friend who I cannot reach now. The inducer motor turns on and the glow plug ignites the pilot and the burners also kick on. The burners stay on for approx 30 or 40 seconds then kick off. Then it does it all over again. I cleaned the flame sensor and it didn't help. Could it be that the blower control board is bad? --Perhaps the smart valve shuts down when it senses the blower has not kicked on?

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