Robert W Sanford , FL May 28, 2015 Appliance: Samsung Microwave SMH7177STE/XAA Samsung Microwave Smh7177ste/Xaa / : Microwave would not heat had power. How to replace Microwave Door Switch. Utilized a YouTube video to isolate the door switches as the issue. These were easily identified following the isolation process and simple testing. I ordered a door switch and secondary switch on Monday and they arrived on Tuesday via FedEx. 15 Minutes to re-install, re-assemble cover and the unit was working fine. A very good experience with parts availability and shipping. 51 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes