E12
FLO
Real-Time Clock (RTC) or Timekeeping Failure
Charger indicates E12 / ‘RTC Error’ or ‘Clock Failure’ and may have issues with scheduled charging.
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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 RTC chip on control board, Depleted RTC backup battery (if present), Firmware bug affecting timekeeping, Power interruptions corrupting time data
How to Fix / Troubleshooting
Safety first: Turn OFF power before opening the charger. This fault usually does not affect basic safety but can disrupt scheduling.
- Reset time settings: Using the FLO app or web portal, reconfigure the charger’s time, timezone, and any scheduled charging windows.
- Power-cycle: Turn OFF the breaker for 2 minutes, then ON, and verify if the error clears.
- Check for firmware updates: Use FLO’s app or support tools to update firmware, which may correct RTC issues.
- If E12 persists and scheduling is critical: A technician may need to replace the main control board (which contains the RTC). Some models may have a replaceable RTC backup battery; consult FLO documentation.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board
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