Thermador speed ovens combine microwave and convection cooking in one built-in unit, using a temperature sensor (RTD) and door-latch switches to manage safe operation. Codes like E3/E4 (sensor open/shorted) are common and generally safe to schedule normally, while E9 (door latch) should be checked before continued use.
Because built-in microwaves and speed ovens are integrated into cabinetry, our technicians are experienced working in tight, built-in installations without damaging surrounding trim.
Common Microwave Problems
Microwave or speed oven shuts off partway through cooking
Door won't latch or won't release
Display shows an E-code
No heat, but the display and fan work normally
Unusual arcing or sparking inside the cavity
Control panel unresponsive
Microwave Error Codes
Recognize a code on your display? Look it up before you unplug anything or attempt a repair.
E1
Thermador Speed Oven E1 Error Code
E4
Thermador Speed Oven E4 Error Code
E9
Thermador Speed Oven E9 Error Code
ER4
Bosch Microwave ER4 Error Code
ER11
Bosch Microwave ER11 Error Code
E2
Thermador Speed Oven E2 Error Code
E3
Thermador Speed Oven E3 Error Code
E11
Bosch Microwave E11 Error Code
E17
Bosch Microwave E17 Error Code
ER1
Bosch Microwave ER1 Error Code
Popular Thermador Microwave Models
Thermador MCES301HS
Model # MCES301HS
Thermador MC30WS
Model # MC30WS
Bosch HMV8053U
Model # HMV8053U
Bosch HMD8451UC
Model # HMD8451UC
Why Trust Us With Your Thermador Microwave
- Factory-trained on Bosch microwave 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.