Question:

Furnace fires for 10 seconds then cuts off

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I have a forced air Weatherking. When I set the thermostat to activate the furnace, the ignitor will begin to glow, after about 10-15 seconds, you can hear the gas kick on. The gas ignites and everything functions as normal. After about 10 seconds the flames shut off, and the furnace tries to ignite again. It will keep doing this cycle for 2 or 3 or 10 attempts, then it will finally fire and stay on. Furnace will run to heat house to desired temp. Just randomly shuts off during start up. Like I said eventually it will stay lit and heat the house. Does anyone have a solution?

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