Thermador’s own documentation for this category is mostly a generic “E” plus a number, with one specific, named exception: E11, which it identifies as a touch-button problem, often caused by condensation on the keypad, clearable with a dry wipe and a power cycle. Beyond that, Thermador’s guidance is the same as for its ovens — note the exact code, disconnect power at the fuse box, and call support — which is exactly the standard we hold to rather than inventing a specific cause for an unlisted code.
Because a speed oven adds convection heating and a more complex control board on top of standard microwave function, we confirm which platform you have before diagnosing, since the failure points genuinely differ between the two.
Common Microwave & Speed Oven Problems
Microwave or speed oven won't heat, though the display and fan run normally
Touch controls unresponsive (Thermador's documented E11 condensation-related problem)
Display shows a generic numbered "E" error code
Speed oven's convection function doesn't engage
Door won't latch, or a door-sensor problem prevents the cycle from starting
Unusual arcing or sparking inside the cavity
Microwave & Speed Oven Error Codes
Recognize a code on your display? Look it up before you unplug anything or attempt a repair.
Popular Thermador Microwave & Speed Oven Models
Thermador MD24WS
Model # MD24WS
Thermador MD30WS
Model # MD30WS
Thermador MU30WSU
Model # MU30WSU
Thermador MC30WP
Model # MC30WP
Thermador MBES (An American Icon)
Model # MBES
Thermador MCES (An American Icon)
Model # MCES
Why Trust Us With Your Thermador Microwave & Speed Oven
- Trained on Thermador microwave & speed oven control systems and diagnostics.
- Genuine OEM parts stocked for the most common failures.
- Upfront flat-rate pricing, approved by you before we start.
- 30-day workmanship warranty on every repair. Parts may carry the manufacturer's warranty where applicable.