Answer Hi Gary. Remove power and then remove the unit. Then place it on a protected table top and remove the outer cover. You will need a torx style;e T-20 security bit because usually one screw has the security style with a raised dimple in the middle so you cannot just use a regular torx tip bit. Now then you have the cover off you will focus at the center of the top. This is the blower hsg. assy. You need to mark all the electrical connectors and even take a cell phone picture of them before removal. You need to remove the entire blower assy. and you now have gained access to the top of the cavity light cover/diffuser. Remove the cover and access the light bulb. Be careful about not at all touching the bulb with your fingers. Use gloves so the bulb cannot react negatively w/oils from the fingers and shorten the life span. Make sure you have good tight electrical connections from the socket to the board in case of no voltage. Bulb part # WP4713-001165. Board part # WPW10127101. Thank You. Read More... Answered by AppliancePartsPros.com | Thursday, January 19, 2012