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    cherr Posts: 3, Reputation: 1
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    Oct 24, 2011, 06:59 AM
    What causes my goodman furnace 100-3 to start and restart
    Had ignitor and heat seņor replaced. My furnace is about 16 yrs. Old... It starts up normal
    Sometime stays on full cycle. Other times starts fires up and then flame goes out and cycle
    Tries again about 3 time. I then shut down the themastat. Had thermostate checked out also
    All by licensed heating a cooling dudes. One said could be ciruit board. Not sure if we replace and not the problem then we will check blower motor. Other company said blower motor fine. Does not act up when heating and cooling company comes out. Seems to act up after furnace runs awhile. What could be the problem before I get ridpped for a circuit board that I might not need. Any suggestions.

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