| Make sure all connectors are tight at board/module. You may want to remove and reinstall. Make there is a good ground with the ignition control board or module. Be sure flame is around flame sensor, and that burner is not dirty in that area.
Make sure pressure switch is staying closed when you see flame go out. If you find that it went open, then suspect condensate drain line possibly plugging up with water. If flame AND inducer fan go out at same time, you need to see if power from the stat is being interrupted. |