Bomann
Bomann Microwaves Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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dE
Microwave shows dE or DE and will not start; sometimes accompanied by a beeping sound when closing the door.
Door Error / Door Not Properly Closed
E0
Microwave will not start; display shows E0 immediately after pressing START.
Door Interlock System Fault
E1
Microwave stops shortly after starting and displays E1 on the control panel.
Temperature Sensor / NTC Fault
E2
Microwave runs for a few seconds, then stops and shows E2 on the display.
Magnetron Overheat / Thermal Cut-out Fault
E3
Microwave beeps and shows E3; cooking does not start.
Humidity / Steam Sensor Fault
E4
Microwave displays E4 and will not heat or start any program.
Inverter / High-Voltage Power Supply Fault (Inverter Models)
E5
Microwave shows E5 and stops heating; fan and light may still operate.
High-Voltage Transformer / Power Supply Fault (Non-Inverter Models)
E6
Microwave beeps and shows E6; keypad does not respond correctly or some buttons do nothing.
Keypad / Touch Control Panel Fault
E7
Microwave displays E7 and will not start; clock and basic display still work.
Control PCB Communication / Internal Error
E8
On grill or convection Bomann microwaves, E8 appears and grill/convection will not start.
Grill / Convection Heater Circuit Fault
E9
Microwave shows E9 and stops; turntable and fan may not operate correctly.
Fan Motor / Airflow Fault
H0
Display shows H0 or HO; microwave does not heat but other functions appear normal.
Child Lock / Safety Lock Activated
H1
On some Bomann convection models, H1 appears and the oven stops heating.
Convection Temperature Overheat / Sensor Fault
SE
Microwave beeps continuously and shows SE; some keys may appear stuck.
Keypad Stuck Key / Shorted Membrane
Symptom
Microwave cavity light flickers during operation, independent of door opening.
Intermittent Lamp or Lamp Circuit
Symptom
Microwave continues to run the fan for a long time after cooking has finished.
Extended Cooling Cycle
Symptom
Microwave convection or grill mode takes excessively long to reach temperature or does not brown food properly.
Reduced Grill / Convection Heating Performance
Symptom
Microwave display and lights work, but pressing START does nothing; no relay click or fan noise.
No Start – Control or Door Interlock Issue
Symptom
Microwave display is blank or very dim; unit does not respond, but mains power is present.
No Display / Dead Control Panel
Symptom
Microwave display works but is very dim or some segments are missing.
Display Module Degradation
Symptom
Microwave door glass or outer surface becomes excessively hot to the touch during operation.
Overheating Door / Insufficient Ventilation
Symptom
Microwave door is difficult to open or close, or does not latch smoothly.
Door Mechanism Wear or Misalignment
Symptom
Microwave emits a high-pitched squeal or chirping noise during operation.
Fan or Turntable Motor Bearing Wear
Symptom
Microwave emits sparks or arcing inside the cavity during cooking.
Cavity Arcing / Waveguide Damage
Symptom
Microwave fan runs but there is no turntable movement and no heating.
Partial Power Delivery / Relay or HV Fault
Symptom
Microwave has a strong burning or electrical smell during or after operation.
Overheating or Electrical Insulation Breakdown
Symptom
Microwave interior light does not turn on, but heating and other functions work normally.
Interior Lamp Failure
Symptom
Microwave interior light, fan, and turntable run when the door is closed, even without pressing START.
Door Interlock Switches Miswired or Stuck
Symptom
Microwave keypad buttons are unresponsive or require very hard pressing to register.
Keypad Wear or Contamination
Symptom
Microwave leaks steam or moisture around the door or control panel during cooking.
Excessive Condensation / Door Seal Issue
Symptom
Microwave makes rattling or scraping noises when the turntable rotates.
Mechanical Noise from Turntable Assembly
Symptom
Microwave runs but does not heat food; turntable and interior light work normally.
No Heating – High-Voltage System Failure
Symptom
Microwave runs but makes loud buzzing or humming noises, louder than usual, sometimes accompanied by a burning smell.
Abnormal Noise – High-Voltage Component or Magnetron Arcing
Symptom
Microwave stops mid-cycle and resets, losing the clock and program settings.
Power Interruption / Internal Power Supply Instability
Symptom
Microwave trips the household circuit breaker or blows the main fuse when starting a cooking cycle.
Short Circuit in High-Voltage or Line Circuit
Symptom
Microwave turntable does not rotate, but heating still occurs.
Turntable Drive Failure
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| dE |
Microwave shows dE or DE and will not start; sometimes accompanied by a beeping sound when closing the door.
|
Door Error / Door Not Properly Closed | View Details |
| E0 |
Microwave will not start; display shows E0 immediately after pressing START.
|
Door Interlock System Fault | View Details |
| E1 |
Microwave stops shortly after starting and displays E1 on the control panel.
|
Temperature Sensor / NTC Fault | View Details |
| E2 |
Microwave runs for a few seconds, then stops and shows E2 on the display.
|
Magnetron Overheat / Thermal Cut-out Fault | View Details |
| E3 |
Microwave beeps and shows E3; cooking does not start.
|
Humidity / Steam Sensor Fault | View Details |
| E4 |
Microwave displays E4 and will not heat or start any program.
|
Inverter / High-Voltage Power Supply Fault (Inverter Models) | View Details |
| E5 |
Microwave shows E5 and stops heating; fan and light may still operate.
|
High-Voltage Transformer / Power Supply Fault (Non-Inverter Models) | View Details |
| E6 |
Microwave beeps and shows E6; keypad does not respond correctly or some buttons do nothing.
|
Keypad / Touch Control Panel Fault | View Details |
| E7 |
Microwave displays E7 and will not start; clock and basic display still work.
|
Control PCB Communication / Internal Error | View Details |
| E8 |
On grill or convection Bomann microwaves, E8 appears and grill/convection will not start.
|
Grill / Convection Heater Circuit Fault | View Details |
| E9 |
Microwave shows E9 and stops; turntable and fan may not operate correctly.
|
Fan Motor / Airflow Fault | View Details |
| H0 |
Display shows H0 or HO; microwave does not heat but other functions appear normal.
|
Child Lock / Safety Lock Activated | View Details |
| H1 |
On some Bomann convection models, H1 appears and the oven stops heating.
|
Convection Temperature Overheat / Sensor Fault | View Details |
| SE |
Microwave beeps continuously and shows SE; some keys may appear stuck.
|
Keypad Stuck Key / Shorted Membrane | View Details |
| – |
Microwave cavity light flickers during operation, independent of door opening.
|
Intermittent Lamp or Lamp Circuit | View Details |
| – |
Microwave continues to run the fan for a long time after cooking has finished.
|
Extended Cooling Cycle | View Details |
| – |
Microwave convection or grill mode takes excessively long to reach temperature or does not brown food properly.
|
Reduced Grill / Convection Heating Performance | View Details |
| – |
Microwave display and lights work, but pressing START does nothing; no relay click or fan noise.
|
No Start – Control or Door Interlock Issue | View Details |
| – |
Microwave display is blank or very dim; unit does not respond, but mains power is present.
|
No Display / Dead Control Panel | View Details |
| – |
Microwave display works but is very dim or some segments are missing.
|
Display Module Degradation | View Details |
| – |
Microwave door glass or outer surface becomes excessively hot to the touch during operation.
|
Overheating Door / Insufficient Ventilation | View Details |
| – |
Microwave door is difficult to open or close, or does not latch smoothly.
|
Door Mechanism Wear or Misalignment | View Details |
| – |
Microwave emits a high-pitched squeal or chirping noise during operation.
|
Fan or Turntable Motor Bearing Wear | View Details |
| – |
Microwave emits sparks or arcing inside the cavity during cooking.
|
Cavity Arcing / Waveguide Damage | View Details |
| – |
Microwave fan runs but there is no turntable movement and no heating.
|
Partial Power Delivery / Relay or HV Fault | View Details |
| – |
Microwave has a strong burning or electrical smell during or after operation.
|
Overheating or Electrical Insulation Breakdown | View Details |
| – |
Microwave interior light does not turn on, but heating and other functions work normally.
|
Interior Lamp Failure | View Details |
| – |
Microwave interior light, fan, and turntable run when the door is closed, even without pressing START.
|
Door Interlock Switches Miswired or Stuck | View Details |
| – |
Microwave keypad buttons are unresponsive or require very hard pressing to register.
|
Keypad Wear or Contamination | View Details |
| – |
Microwave leaks steam or moisture around the door or control panel during cooking.
|
Excessive Condensation / Door Seal Issue | View Details |
| – |
Microwave makes rattling or scraping noises when the turntable rotates.
|
Mechanical Noise from Turntable Assembly | View Details |
| – |
Microwave runs but does not heat food; turntable and interior light work normally.
|
No Heating – High-Voltage System Failure | View Details |
| – |
Microwave runs but makes loud buzzing or humming noises, louder than usual, sometimes accompanied by a burning smell.
|
Abnormal Noise – High-Voltage Component or Magnetron Arcing | View Details |
| – |
Microwave stops mid-cycle and resets, losing the clock and program settings.
|
Power Interruption / Internal Power Supply Instability | View Details |
| – |
Microwave trips the household circuit breaker or blows the main fuse when starting a cooking cycle.
|
Short Circuit in High-Voltage or Line Circuit | View Details |
| – |
Microwave turntable does not rotate, but heating still occurs.
|
Turntable Drive Failure | View Details |
No matching codes found
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