Hello, we are glad you like the Double Electric Wall Oven and completely understand how aggravating receiving an error code may be when using the self clean option. The F9 error code usually means that a component has failed somewhere in the door lock circuit. To fix this issue, simply touch the CLEAR/OFF pad. Allow the oven to cool for one hour then put the oven back into operation. If function error code repeats, disconnect power to the oven and call GE Service at 1-800-432-2737. Thank you for your purchase and we appreciate you for reaching out. Shayla@GEA