Miele Dishwasher Error Code F43 — Size / Configuration Error
What this means
Error F43 on Miele dishwashers indicates a configuration or EEPROM data error in the control board. This may occur after a power surge corrupts stored settings, after a control board replacement that has not been properly programmed for the specific model, or if the EEPROM chip itself has failed. The dishwasher may refuse to start any program.
Alternate codes: F 43
Step-by-step fix
4 stepsComplete power reset
Turn off the dishwasher at the circuit breaker for 15 minutes. This allows the EEPROM controller to fully reset. Restore power and try starting a program.
A 15-minute wait is recommended specifically for EEPROM errors.
Check if the error occurred after board replacement
If a new control board was recently installed, it may not have been programmed for your specific model. The board needs to be configured with the correct model parameters.
Miele boards often come pre-programmed for a model range but need final configuration via service tools.
Install a surge protector
If the error was likely caused by a power surge, install a surge protector to prevent future occurrences.
A quality surge protector with at least 1,000 joules of protection is recommended for premium appliances.
Contact Miele service
If the power reset does not clear F43, the control board needs professional reprogramming or replacement.
Have your model number and serial number ready when calling Miele service.
When to call a professional
F43 on dishwashers typically requires Miele service tools to reprogram the EEPROM. This is not a DIY repair.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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