Robert P Escondido , CA August 27, 2018 F9 error code I replaced the cooling fan for the lower oven. This fan is located in the space between the top and bottom ovens. I also chose to replace both the BAKE and TCO thermostats. Read More... Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Nut Drivers, Pliers, Screwdrivers, Socket Set