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ADRIUM Service Solutions
(925) 999-4095 · Serving the Bay Area · CSLB #1136642 · BBB A+
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October 26, 2026 Lafayette, CA

Thermador Built-In Microwave Running but Not Heating in Lafayette: Door Switch Replaced

The built-in microwave ran, but it didn't heat the food.

Thermador Thermador built-in microwave, the top unit of a combination wall oven Cooking appliance repair

Thermador built-in microwave repair in Lafayette

Problem: This Lafayette home has a Thermador combination wall oven, with the microwave on top and the oven below. The microwave would start and run like normal, but the food didn’t heat.

Diagnostics: Our technician traced it to a faulty door switch. A microwave has more than one door switch, and the heating circuit only turns on when they say the door is shut. One bad switch can leave the unit running with no heat at all.

Solution: We replaced the door switch and put the microwave back together. Then we ran it through several heating cycles.

Result: It heats again and runs normally. If your microwave runs but stays cold, mention that when you book. It’s a different problem from a microwave that’s completely dead. We repair Thermador microwaves and wall ovens in Lafayette and across the East Bay.

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