Chrstopher C St. Louis , MO December 29, 2014 Appliance: Model GE CAFE DUAL FUEL CONVESTION OVEN Ge repair personnel had condemmed our cafe' dual fuel range because the oven would not work and the display kept flashing a loc code I found a Wiring Diagram for the range online and figured out that the only part that the repairmen had not replaced was the Oven Lock. This lock has (4) microswitches on it that feed back into various parts of the brain telling the brain that it is OK to operate the oven. Read More... 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes Tools: Nut Drivers, Screwdrivers