E09
Grundig
EEPROM / Configuration Memory Error
Microwave displays E09 and will not start; sometimes occurs after a power surge or outage.
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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
Corrupted EEPROM data on control board, Failed EEPROM IC, Power surge damage to control PCB, Firmware error
How to Fix / Troubleshooting
Safety first: Unplug the microwave before removing panels.
User-level actions:
- 1. Power cycle: Disconnect from mains for at least 10 minutes. Plug back in and check if E09 clears.
- 2. Check supply quality: Ensure the microwave is connected directly to a wall outlet, not through a faulty extension lead or multi-plug adapter. Avoid outlets with known power issues.
Technician-level actions:
- Inspect the control PCB for surge damage (burnt tracks, IC damage).
- Reprogram or replace the EEPROM/control PCB according to Grundig service procedures.
Because EEPROM and firmware handling require specialized tools and data, most users should replace the entire control PCB via a professional service center.
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Repair Difficulty
Professional Required
5/5
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