Lennox Furnace. The damper door on the furnace does not open all the way. As soon as as I push it down manually the green led light turns on and the furnace ignites. How can I fix the door or can I just dismantle it and the unit might work anyway?
Thanks

Lennox Furnace G20. The damper door on the furnace does not open all the way. As soon as as I push it down manually the green led light turns on and the furnace ignites. How can I fix the door or can I just dismantle it and the unit might work anyway?
Thanks