I have to change thermo couple and spark electrode in my furnace, but don't know how to access furnace. It's built into wall, so I need to know access door or easiest way. Model #MG8-065-AACWL-05. Any help at all is much appreciated,thanks

The door should life straight up,, opening the door is the easy part, then the hard part begins. Maybe you will have to call someone because it will get even more complicated