Although the glass on oven doors seldom gets broken, accidents happen. You can replace the glass door on a Whirlpool oven if the glass breaks or otherwise needs replacement. The glass panels are available at big box hardware stores and appliance repair facilities.
Disconnect the power cord on the Whirlpool oven from the wall outlet. If you can not reach the power cord, you can turn power to the oven off at the circuit breaker inside the home electrical panel.
Open the oven door halfway and insert a nail or screw into the door hinges on the bottom of each side of the door. Close the door as far as the nails will allow. The nails will keep the door hangar from slipping into the oven while the door is off.
Grasp the door on each side with your hands and pull the door straight up until it stops. Push down the top of the door, then pull out to release the door from the hinge. Place a large towel on the floor and place the door on the towel with the handle and glass facing up.
Remove the two screws at the top of the door that secure the handle and the trim to the door liner using a Phillips head screwdriver.
Remove the door handle and the trim from the oven door.
Slide the glass out of the lower trim channel at the bottom of the door. If the glass is badly broken, put gloves on before sliding it out of the trim channel. Use a paint brush to remove dirt and broken glass from inside the trim channel.
Slide the new glass into the trim channel from the bottom of the door. Reattach the trim making sure that the side trim fits under the top edge of the glass. The trim channel will be flush to the side of the glass, not over the top of the glass. (On Whirlpool Roper models the side trim fits over the top edge of the glass.) Secure the handle and trim using the retaining screws.
Grasp the sides of the door and place the bottom of the door over the top of the door hangars on the oven. Push down on the top of the door and push the door in to engage the door hangars into the oven door. Lower the door and push the bottom down until the door hinges lock into place securely. Remove the nail out of each of the door hangars and close the oven door.
Plug the oven back into the wall outlet or turn the circuit breaker back on.
Always disconnect appliances from their power source before attempting repairs. Always wear gloves when handling broken glass.