Is this furnace open to the room, or is it in an enclosed area, with just an access panel? If it is in an enclosed area, I would consider it technically not in the "bedroom". Plus, as a HVAC tech, the last thing I would want to see is the furnace on an arc fault. The risk of the arc fault tripping out is too great, leaving the home without heat when it is needed the most.
George, I agree this should not be tripping the AFCI. The AFCI is really looking for a series of short, high current events. (on the order of 50a or more). I can't see an igniter doing anything like that.
Iwire, I'm no expert on AFCI design however why do you thing the GFCI side of the AFCI would trip? If it is working properly, the GFCI portions measues power in/power out. If there is a difference of a few millivolts, it trips. If the igniter is grounding out then yes it would trip.
Last edited by sparkyinak; 09/26/0708:54 AM. Reason: Do not know how to spell AFCI