Locate the appliance model number. For older model microwaves, the model number can usually be found on the back of the appliance or on the bottom.
Visit the GE Appliance Store online, and enter your model number in the field labeled "Model Number." Click "Go" to execute the search.
Click on the same model number you entered on the next page of the website.
Select the area of the microwave on which the needed part is located. Options available depend upon the particular model of microwave you have. Click "Go."
Select the correct part from the list of prices and availability by clicking "Add to Cart."
You will then be prompted to select an area of your appliance. Microwave ovens only have one area, microwave.
Click on "Checkout" if you wish to order the part.