Branden W Tiffin , OH July 18, 2015 Appliance: Kenmore Wall Oven 79048033801 Kenmore Wall Oven 79048033801: Oven started beeping after preheating and flashing an er code the code was only parital showing up so you couldn't read it though. How to replace Controller. I chatted online with a GREAT service rep and he said I should try replacing the controller. He also assured me if that didn't work I could return the part. So I ordered it and had it in place in less than 20 minutes. It totally solved the problem! Great Service and Help from Appliancepartspros!!! I will definitely refer others to them and use them again myself, if need be. THANKS so much! 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes