Thermador Microwave: Door switch problem

If you are looking for the reason why your Thermador microwave doesn’t close, look through this short guide. Various models have several switches that must be working properly to close the door. The door interlock circuit is typically at least 3 microswitches which have to close/open in a specific sequence and arrive at a specific end-configuration to convince the controller that the door was actually closed properly, rather than a crude attempt at bypassing the switches being made. The switches themselves are normally very reliable but if the door-latch has worn or broken it may not contact them correctly. As for testing the switches, unplug your microwave. Remove the switch's harness or plastic case by depressing its locking tab lever on the side and lifting the harness away from the terminals. Set a multimeter to a resistance scale of Rx1. Attach one lead to each of the switch's two prongs so that one lead is connected to the common terminal and the other lead is attached to the normally open terminal. The multimeter should show a reading of infinity to indicate that the switch is open. Press the switch's actuator until you hear a click. Check the multimeter for a resistance reading of zero. If you don't hear a click or get a resistance reading other than zero, the switch has failed and must be replaced. Please let us know if you need any help with checking your Thermador microwave for the door switch issue.