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Anonymous
Anonymous Posted on Dec 21, 2009
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Gas furnace, main burner ignites the other 2 don't. then shutdn.

Rheem/Ruud Silhouette II gas furnace UGPH07EAUER. HSI (ignitor) lights up at main burner head. Gas flows and is ignited at main burner 1st head. There are three burner heads. The flame sensor is located at the third burner head. the gas is not ignited at the 2nd and 3rd heads and because the flame sensor rod does not detect heat the furnace shuts off the gas and cuts the fan off 90 seconds later. Cleaned the flame sensor. Once the main burner flames up I can manually light the 2nd and 3rd burners and the unit will run until the thermostat shuts it down automatically. Help

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Anonymous

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  • Posted on Dec 21, 2009
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Between the burners is a small rail in the pressed steel where the flame runs across to light the other burners and it sounds like there is dirt or debris in the step over rails causing the problem. You will need to use some compressed air on those rails to clear them out. Once the rails are clear the other two burners should ignite right away.

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  • Anonymous Dec 21, 2009

    Also you can try using a small flatblade screwdriver to clean out and spread open the rail slightly to help the gas flame travel to the other burners.

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Richard Kozlowski

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  • Posted on Feb 09, 2014
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My problem as well thanks for the solution!

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    Jupiterimages/Getty images The electronic ignition system in a gas furnace is a modern development that provides more reliable performance than a standing pilot and offers energy savings through better furnace efficiency. There are two basic types of electronic ignition systems:
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Silhouette 2. Burners come on igniter clicks on but then clicks off then clicks on again and again without the blower ever turning on

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