This burner access door (part number AS29501-3) is for water heaters.
Burner access door AS29501-3 attaches to the outer cabinet and covers the opening to the burner and pilot.
Wear work gloves to protect your hands when installing this part.
AS29501-3 (or AS29501)
The manufacturer substituted part AS29501 with this new part AS29501-3
Plumbing and Heating