James C Clifton , TX May 15, 2015 Appliance: Whirlpool 30`` Built-In Electric Combination Microwave Wall Oven WOC54EC0AS00 Whirlpool Oven Woc54ec0as00: F1e5 error code. How to replace Microwave Electronic Control Board. Replaced Inverter and two control boards but the magnetron was the real problem. Had a hold burned through the element. 10 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes