Thermador Microwaves Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E01
Microwave will not start; display shows E01 shortly after pressing Start.
Door Switch / Door Latch Fault
E02
Microwave stops heating shortly after start and displays E02.
Overheat / Magnetron Thermal Cutout Trip
E03
Microwave runs but does not heat; E03 appears on the display after a few seconds.
Magnetron / High Voltage System Failure
E04
Microwave display shows E04 and unit will not start a cooking cycle.
Touch Control Panel / Keypad Failure
E05
Microwave shows E05 and stops mid-cycle or will not start; sometimes accompanied by a beeping alarm.
Inverter / Power Supply Error (Inverter Models)
E06
Microwave displays E06 and will not run; sometimes occurs after a power surge.
Main Control Board Communication / Logic Error
E07
Microwave shows E07 and stops heating; fan and light may still operate.
Cavity Temperature Sensor (NTC) Fault
E08
Microwave displays E08 and will not start; often associated with turntable not moving.
Turntable Motor / Position Sensor Error
E09
Microwave shows E09 and beeps; interior light may stay on and fan may run.
Stuck Relay / Power Relay Failure on Control Board
E10
Microwave displays E10 and will not start; sometimes after a door slam or impact.
Door Interlock Alignment / Monitoring Circuit Error
E11
Microwave shows E11 and the interior light stays on even when the door is closed; unit may not start.
Door Sensing Circuit Error
E12
Microwave displays E12 and convection or combination cooking will not start (on convection-capable Thermador models).
Convection Fan / Heater Circuit Error
E13
Microwave shows E13 and stops; often associated with steam cooking or sensor cooking modes.
Humidity / Steam Sensor Error
E14
Microwave displays E14 and will not start; sometimes occurs after a long cook cycle.
Cooling Fan / Airflow Error
E15
Microwave shows E15 and beeps; display may dim or flicker.
Low Line Voltage / Power Input Error
E16
Microwave displays E16 and the clock or display behaves erratically.
Display / User Interface Communication Error
E17
Microwave shows E17 and sensor cooking or auto programs fail to start.
Weight / Load Sensor or Program Logic Error
E18
Microwave displays E18 and immediately cancels any attempt to start a cycle.
Child Lock / Safety Lock Circuit Error
E19
Microwave shows E19 and the interior light and fan may run but heating does not start.
High Voltage Relay / Power Control Error
Symptom
Microwave cavity accumulates condensation or water droplets on walls and door after cooking.
Excess Condensation / Ventilation Issue
Symptom
Microwave cavity light and fan come on, but the unit shuts off after a few seconds without heating.
Thermal Protection / Safety Cutoff Activation
Symptom
Microwave clock or display is dim, flickering, or partially missing segments.
Display Module Degradation
Symptom
Microwave convection function does not heat or does not reach set temperature (convection models).
Convection Heating Failure
Symptom
Microwave display is lit but buttons do not respond or respond intermittently.
Unresponsive Keypad / Touch Panel
Symptom
Microwave door glass is fogged, streaked, or has moisture trapped between panes.
Door Assembly Moisture Ingress
Symptom
Microwave door will not open or is very difficult to open after cooking.
Door Latch / Release Mechanism Failure
Symptom
Microwave door will not stay closed or pops open during operation.
Door Latch Retention Failure
Symptom
Microwave emits sparks or arcing inside the cavity during cooking.
Cavity Arcing / Waveguide Contamination
Symptom
Microwave has a burning smell, electrical odor, or smoke during or after use.
Overheating / Electrical Insulation Failure
Symptom
Microwave interior light does not come on when the door opens or during cooking, but the unit otherwise works.
Interior Light Failure
Symptom
Microwave makes a rattling or vibrating noise, especially when the fan is running.
Cabinet Vibration / Loose Components
Symptom
Microwave over-the-range cooktop light does not work or only works intermittently.
Cooktop Light Circuit Failure (OTR Models)
Symptom
Microwave over-the-range vent fan does not run or runs only at one speed.
Ventilation Fan Failure (OTR Models)
Symptom
Microwave produces a high-pitched squeal or chirping noise from the turntable area.
Turntable Support / Roller Ring Wear
Symptom
Microwave runs but does not heat food; turntable, light, and fan operate normally, but food remains cold.
No-Heat Condition (Magnetron / HV System Failure)
Symptom
Microwave runs but food heats unevenly; some spots are very hot while others are cold.
Uneven Heating / Poor Energy Distribution
Symptom
Microwave runs but makes loud buzzing, humming, or grinding noises during operation.
Abnormal Operating Noise
Symptom
Microwave runs with the door open or starts as soon as the door is closed without pressing Start.
Door Interlock Safety Failure
Symptom
Microwave sensor cooking programs end too early or overcook food.
Sensor Cooking Calibration / Humidity Sensor Issue
Symptom
Microwave trips the house circuit breaker or blows a fuse when starting a cook cycle.
Short Circuit / Overcurrent on Startup
Symptom
Microwave turntable does not rotate, but heating still occurs.
Turntable Drive Failure
Symptom
Microwave will not power on at all; display is blank and no lights or sounds occur.
No Power / Dead Microwave
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Microwave will not start; display shows E01 shortly after pressing Start.
|
Door Switch / Door Latch Fault | View Details |
| E02 |
Microwave stops heating shortly after start and displays E02.
|
Overheat / Magnetron Thermal Cutout Trip | View Details |
| E03 |
Microwave runs but does not heat; E03 appears on the display after a few seconds.
|
Magnetron / High Voltage System Failure | View Details |
| E04 |
Microwave display shows E04 and unit will not start a cooking cycle.
|
Touch Control Panel / Keypad Failure | View Details |
| E05 |
Microwave shows E05 and stops mid-cycle or will not start; sometimes accompanied by a beeping alarm.
|
Inverter / Power Supply Error (Inverter Models) | View Details |
| E06 |
Microwave displays E06 and will not run; sometimes occurs after a power surge.
|
Main Control Board Communication / Logic Error | View Details |
| E07 |
Microwave shows E07 and stops heating; fan and light may still operate.
|
Cavity Temperature Sensor (NTC) Fault | View Details |
| E08 |
Microwave displays E08 and will not start; often associated with turntable not moving.
|
Turntable Motor / Position Sensor Error | View Details |
| E09 |
Microwave shows E09 and beeps; interior light may stay on and fan may run.
|
Stuck Relay / Power Relay Failure on Control Board | View Details |
| E10 |
Microwave displays E10 and will not start; sometimes after a door slam or impact.
|
Door Interlock Alignment / Monitoring Circuit Error | View Details |
| E11 |
Microwave shows E11 and the interior light stays on even when the door is closed; unit may not start.
|
Door Sensing Circuit Error | View Details |
| E12 |
Microwave displays E12 and convection or combination cooking will not start (on convection-capable Thermador models).
|
Convection Fan / Heater Circuit Error | View Details |
| E13 |
Microwave shows E13 and stops; often associated with steam cooking or sensor cooking modes.
|
Humidity / Steam Sensor Error | View Details |
| E14 |
Microwave displays E14 and will not start; sometimes occurs after a long cook cycle.
|
Cooling Fan / Airflow Error | View Details |
| E15 |
Microwave shows E15 and beeps; display may dim or flicker.
|
Low Line Voltage / Power Input Error | View Details |
| E16 |
Microwave displays E16 and the clock or display behaves erratically.
|
Display / User Interface Communication Error | View Details |
| E17 |
Microwave shows E17 and sensor cooking or auto programs fail to start.
|
Weight / Load Sensor or Program Logic Error | View Details |
| E18 |
Microwave displays E18 and immediately cancels any attempt to start a cycle.
|
Child Lock / Safety Lock Circuit Error | View Details |
| E19 |
Microwave shows E19 and the interior light and fan may run but heating does not start.
|
High Voltage Relay / Power Control Error | View Details |
| – |
Microwave cavity accumulates condensation or water droplets on walls and door after cooking.
|
Excess Condensation / Ventilation Issue | View Details |
| – |
Microwave cavity light and fan come on, but the unit shuts off after a few seconds without heating.
|
Thermal Protection / Safety Cutoff Activation | View Details |
| – |
Microwave clock or display is dim, flickering, or partially missing segments.
|
Display Module Degradation | View Details |
| – |
Microwave convection function does not heat or does not reach set temperature (convection models).
|
Convection Heating Failure | View Details |
| – |
Microwave display is lit but buttons do not respond or respond intermittently.
|
Unresponsive Keypad / Touch Panel | View Details |
| – |
Microwave door glass is fogged, streaked, or has moisture trapped between panes.
|
Door Assembly Moisture Ingress | View Details |
| – |
Microwave door will not open or is very difficult to open after cooking.
|
Door Latch / Release Mechanism Failure | View Details |
| – |
Microwave door will not stay closed or pops open during operation.
|
Door Latch Retention Failure | View Details |
| – |
Microwave emits sparks or arcing inside the cavity during cooking.
|
Cavity Arcing / Waveguide Contamination | View Details |
| – |
Microwave has a burning smell, electrical odor, or smoke during or after use.
|
Overheating / Electrical Insulation Failure | View Details |
| – |
Microwave interior light does not come on when the door opens or during cooking, but the unit otherwise works.
|
Interior Light Failure | View Details |
| – |
Microwave makes a rattling or vibrating noise, especially when the fan is running.
|
Cabinet Vibration / Loose Components | View Details |
| – |
Microwave over-the-range cooktop light does not work or only works intermittently.
|
Cooktop Light Circuit Failure (OTR Models) | View Details |
| – |
Microwave over-the-range vent fan does not run or runs only at one speed.
|
Ventilation Fan Failure (OTR Models) | View Details |
| – |
Microwave produces a high-pitched squeal or chirping noise from the turntable area.
|
Turntable Support / Roller Ring Wear | View Details |
| – |
Microwave runs but does not heat food; turntable, light, and fan operate normally, but food remains cold.
|
No-Heat Condition (Magnetron / HV System Failure) | View Details |
| – |
Microwave runs but food heats unevenly; some spots are very hot while others are cold.
|
Uneven Heating / Poor Energy Distribution | View Details |
| – |
Microwave runs but makes loud buzzing, humming, or grinding noises during operation.
|
Abnormal Operating Noise | View Details |
| – |
Microwave runs with the door open or starts as soon as the door is closed without pressing Start.
|
Door Interlock Safety Failure | View Details |
| – |
Microwave sensor cooking programs end too early or overcook food.
|
Sensor Cooking Calibration / Humidity Sensor Issue | View Details |
| – |
Microwave trips the house circuit breaker or blows a fuse when starting a cook cycle.
|
Short Circuit / Overcurrent on Startup | View Details |
| – |
Microwave turntable does not rotate, but heating still occurs.
|
Turntable Drive Failure | View Details |
| – |
Microwave will not power on at all; display is blank and no lights or sounds occur.
|
No Power / Dead Microwave | View Details |
No matching codes found
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