F6
Bauknecht
Inverter Power Module Fault (Inverter Models)
Microwave displays F6 and does not heat; fan may run briefly then stop.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed inverter board, Shorted magnetron drawing excessive current, Loose or burnt wiring between inverter and magnetron, Control board not communicating with inverter
How to Fix / Troubleshooting
Critical safety warning: Inverter-based microwaves contain very high-frequency, high-voltage circuits. Do not attempt to service the inverter or magnetron unless you are qualified.
- Step 1 – Power reset: Unplug for 10 minutes, then reconnect and test. If F6 returns, internal hardware is likely faulty.
- Step 2 – Ventilation check: Ensure vents are clear; overheating can sometimes trigger inverter protection.
- Step 3 – Professional diagnosis: A technician should test the inverter power module, magnetron, and wiring harness for shorts or opens.
- Step 4 – Replace inverter or magnetron: If the inverter is defective, replace it with the correct Bauknecht inverter module. If the magnetron is shorted, it must be replaced and the inverter rechecked.
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Repair Difficulty
Professional Required
5/5
Required Part
Inverter Power Module
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