Charger shows E20; internal memory or configuration cannot be read; unit may not start.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn OFF power before opening the charger. Most memory issues are low-voltage but still require caution.
- 1. Power cycle: Turn the breaker off for 2–3 minutes, then back on. Sometimes memory errors clear after a full reset.
- 2. Factory reset: If accessible via display or app, perform a factory reset to reload default configuration. Note that this will erase custom settings and schedules.
- 3. Firmware reload (if supported): Use official Besenergy tools to reload or update firmware, following instructions carefully to avoid interruption.
- 4. Avoid repeated resets: If E20 recurs frequently, the EEPROM or memory section of the main board is likely failing.
- 5. Replace main control board: Persistent E20 after reset and firmware reload indicates a hardware memory fault; replace the main control board.
When to call a professional: For firmware operations and board replacement, contact Besenergy support or a qualified technician.
Repair Difficulty
Required Part
We may earn a commission from links on this page.