E14
Webasto
Firmware Corruption / Software Boot Failure
Charger indicates E14 or ‘firmware error’; unit may reboot repeatedly or refuse to start 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
Interrupted firmware update, Flash memory error on main PCB, Incompatible firmware version loaded, Power loss during software write
How to Fix / Troubleshooting
Safety first: Do not repeatedly power cycle during an update; this can worsen corruption.
- Check update status: If the error appeared after a firmware update, consult the Webasto app or portal for recovery instructions.
- Stable power: Ensure the charger is on a stable circuit with no frequent outages or tripping breakers.
- Attempt recovery: Some models support a forced firmware recovery via USB, SD card, or service tool. Follow Webasto’s official procedure only.
- Service replacement: If the bootloader or flash memory is damaged, the main control PCB may need replacement by an authorized service center.
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Repair Difficulty
Professional Required
5/5
Required Part
Webasto Main Control PCB
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