Kevin S Morrisville , VT October 05, 2020 Appliance: LG Microwave Hood Combo LMV1813ST/00 Lg Microwave Lmv1813st/00: No heat/fan/turntable but still ran. How to replace Microwave Door Switch. Replaced upper door latch switch. It was obvious immediately after removing the cover that the red microswitch plunger wasn't returning when released. Didn't have to chase continuity anywhere. Surprising that a broken switch would lead to the behavior that it did, but a really easy and cheap repair! Ordered extra switches for the next time. AppliancePartsPros FTW again! Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes