Furnace does not light main burner

Posted by on December 15, 2007, 9:37 pm

I have a honeywill furnance, about 20 years old with electonic
igniter. When I turn the thermostat up, the igniter works and lights
the pilot light, but it does not stop sparking, as it should. The
main burners do not turn on, I presume because the igniter has not
stopped firing. The pilot flame is on the thermocouple as it is
supposed to be. Any suggestions on what the problems is and how to
fix it?

TIA
Denis

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