West Furnace Access is a room in the Chozo Ruins. It appears in Metroid Prime. It is a curved, round metal tunnel that contains no creatures or other features of interest; it is only a room that connects two others.
A glitch can happen in this room in the original NTSC version of Metroid Prime, as it uses the original, faster loader. The game may crash while it is is loading the Furnace. This bug can be avoided by using a Wii. There is also a way to get around it by strafing along the left wall until you can see the right edge of the door, shoot the door so it becomes active and continue to move along the left wall until the door opens and then you can walk into the room normally.