E12
go-e
Internal Current Measurement Fault
Charger indicates E12; app may describe it as metering or current sensor error.
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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
Open or shorted internal current transformer (CT), Loose CT connector on control board, Damaged CT due to overload, Faulty measurement IC on control board
How to Fix / Troubleshooting
Safety: Turn off power before accessing internal components.
- Locate CTs: Identify the current transformers around the phase conductors on the power board.
- Inspect physically: Check for cracked CT housings, burnt marks, or loose mounting.
- Check connectors: Follow CT leads to the control board and reseat the connectors. Ensure no wires are pinched or broken.
- Compare readings: If the app shows unrealistic current values (e.g., non-zero when idle), the CT or measurement circuit is likely faulty. Replace the CT assembly or control board.
- Recalibrate if supported: Some models allow calibration via service tools. Follow go-e procedures if available.
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Repair Difficulty
Hard
4/5
Required Part
Internal Current Transformer Assembly
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