Sanders H Avon , IN December 28, 2015 The convection fan was making a humming noise and quite turning a couple times This was a piece of cake. A phillips screwdriver and 15 minutes to remove six screws, pop out the old one and install the new one. The toughest part about the job was reaching into the oven to the back wall to unscrew the screws.The fan assembly is a complete unit and comes with connectors for the fan and the heating element. I did not even have to pull the oven out from the wall since all access was through the open oven door. Read More... Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Screwdrivers