Step 1
Unplug your microwave from its power source.
Step 2
Remove the top grill if you have a GE Spacemaker over-the-range model. Removing the grill requires you to remove a series of screws located either in front of the grill or just inside the grill opening. If you do not have an over-ther-ange model, remove the microwave trim. The trim is held in place by numerous screws located on either side of the microwave.
Step 3
Remove the control panel. The control panel is typically held in place by one screw on top of the panel if you have an over-the-range model. For other models, the control panel is held in by one or more screws either on the top or top and bottom.
Step 4
Make note of the control panel connections. If you need to, draw up a schematic or take a picture. Disconnect all wires from the control panel.
Step 5
Look for the door switch on the left side. The switch looks similar to a dog tag and has two to three wires connecting into it, depending on your GE Spacemaker model. If you cannot locate the switch, your model may have a door that hides the switch. Open the door to reveal the switch. The door is usually plastic and opens with a gentle pull.
Step 6
Disconnect all wires connected to the switch. Make note of how they were connected. Remove the switch. The switch is typically held in place by a clip. Insert the new switch in the same position as the old switch. Make sure that the clip is securely holding it in place. Plug in the wires.
Step 7
Connect the wires back to the control panel and replace the control panel. Replace the grill or microwave trim.