Rocco P East Northport , NY July 12, 2021 Appliance: Bosch Microwave Oven HMC80252UC/01 Bosch Microwave Hmc80252uc/01: The interlock switch burned out, causing the circuit breaker to trip upon opening the door. How to replace Microswitch. I replaced all three micro switches as well as the plastic supports. I'm glad I ordered the supports as the plastic tabs broke removing the old switches. All the new parts fit perfectly and work as original. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours