Ed E Pismo Beach , CA July 04, 2020 Appliance: Magic Chef Microwave MCO160S Magic Chef Microwave Mco160s: Switch membrane was bad. How to replace Switch Membrane (Mco. Replaced the membrane. Easy fix and now I'm pleased to say we have a decent microwave again. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes