John L Selbyville , DE January 21, 2019 Appliance: Samsung Built-In Microwave Oven SMH9207ST/XAA-0001 Samsung Microwave Smh9207st/Xaa-0001 / : Vent fan not working. How to replace Microwave Select Button. Replaced assy key module and button assy. Fan is working great now. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes