Question about Williams 2509612 Ceramic Mid-Size Heater

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Gas flows to long before igniting.

My girlfreinds house is old and the furnace is a Royal Jet Flow FG-2-55 Gravity Vented natural gas fired furnace.

I cleaned the thermal coupler and flame sensor and the furnace now burns longer and works great! Except, now when it starts the gas flows for about 1 to 2 seconds before it ignites. This causes a good flash and about a 6-inch flame flashs out of the venting. Needless to say this is not good.

did I do something wrong, or do I need to adjust the pilot flame making it larger or do I need to replace something?

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  • m. mitchell Nov 19, 2008

    I cleaned the burners and crossovers. The furnace ignited great the first two times then began doing the same thing. It seems to be getting worse as far as the length of time from the gas flowing and then burning.

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  • 17 Answers

Try cleaning the crossovers between the burners. Also look closely at the flame and make sure that the burner is firing all the way to the pilot. Sometimes its just a few little holes that vent a little gas to give the flame a path to follow will be stopped up and cause the condition you describe

Posted on Nov 18, 2008

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