The MU30WSU is Thermador’s current 30-inch over-the-range microwave, confirmed on its product page with a left-side opening door, a 2.1 cu. ft. cavity, 1550-watt output on a 120V/15A circuit, and a built-in ventilation system that does double duty as the range hood.
Because it also functions as the cooktop’s exhaust vent, the MU30WSU has a failure mode the drawer and built-in models don’t: reduced airflow from a dirty grease filter or worn blower motor. It otherwise shares the same door-switch, keypad-condensation, and turntable-wear issues documented across Thermador’s current microwave line, and any numeric error code should be recorded and reported when requesting service.
Key Features
- 30-inch over-the-range microwave with a left-side opening door and a built-in ventilation system
- 2.1 cu. ft. cavity (large capacity), 1550-watt output on a 120V/15A circuit
- Home Connect Wi-Fi control, CookSmart auto-programs, and 10 dedicated microwave programs
Most Common Issues on This Model
Built-in exhaust fan/blower wear or a clogged grease filter can reduce venting performance
Side-swing door hinge or latch wear can prevent the interlock switch from being satisfied
Touch/keypad problems after condensation, and turntable/motor wear causing uneven heating