There is no heat and the “POWER ON” light on the Power Flame control box is “ON” and “Main Fuel” light is “OFF”.

  • No or not enough make-up air (JD-2 air flow switch located by make-up fan motor is not closing. See #3 above.
  • JD-2 Air Flow Switch wired incorrectly. Should be wired to “C” and “N.O.”
  • JD-2 Air Sensing Tubes are not adjusted correctly. Adjust tubes to correct positions, approximately 3″ away from the nearest wall and facing the incoming air. Refer to owner’s manual for more information.