U3
Xiaomi
Program Memory / EEPROM Error
Display shows U3 and the cooker stops or refuses to start, often after a power interruption.
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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 stored settings due to sudden power loss, Failing EEPROM or flash memory on PCB, Firmware bug
How to Fix / Troubleshooting
Safety first: Disconnect from mains before any internal work.
- Factory reset: Perform a factory reset using the key combination described in the user manual (often holding specific buttons while powering on).
- Power cycle: Unplug for 10–15 minutes, then reconnect and try a basic program without custom settings.
- Firmware update: If supported, update the cooker firmware via the Xiaomi Home app to correct potential software bugs.
- Board replacement: If U3 persists and the cooker cannot store or recall programs, the EEPROM or MCU on the PCB is likely faulty. Replace the main control board.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB (MCU / EEPROM)
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