E15
Webasto
Output Overcurrent Protection Trip
Charger shows E15 or ‘overcurrent’; charging stops shortly after start; breaker may trip.
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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
Incorrect maximum current configuration, Short circuit or partial short in cable or connector, Internal contactor arcing, Faulty current sensor calibration
How to Fix / Troubleshooting
Safety first: Repeated overcurrent trips can overheat wiring. Inspect before reusing.
- Check breaker size: Confirm the circuit breaker rating matches the Webasto charger’s configured maximum current.
- Reduce current setting: If your model allows, lower the maximum current via DIP switches or app and test again.
- Inspect cable: Look for hot spots, discoloration, or damage along the Webasto cable and at the plug.
- Test with another EV: If overcurrent only occurs with one vehicle, the car’s onboard charger may be drawing abnormal current.
- Persistent E15: Requires technician to test current sensors, contactor, and internal wiring; replace damaged components as needed.
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Repair Difficulty
Hard
4/5
Required Part
Webasto Output Current Sensor / Main Contactor
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