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The furnace model# DGAA070BDTB will ignite then almost immediately go out it will the ignite again then go out then the blower motor will come on it will then try to ignite again with blower on til the unit shuts off showing a steady red blink for ignition failure i have replaced flame rod sensor checked voltages at limit switches and induction switch and fan and changed t-stat. I am trying to help a low income family with 4 children and I have already put to much time into this job any advice would be a big help.

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Is the flame spreading all the way across the burners within 2 seconds? If not clean the flame tray. If it is and the flame still goes out, you have either a poor ground wire connection or the circuit board is bad. Keep your chin up and thanks for helping others.

Posted on Dec 11, 2009

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