Hyundai
Overheating of Connector or Internal Terminals
Charger or cable becomes excessively hot to the touch during normal 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
Loose terminal screws on input or output, Worn or oxidized contacts in Type 2 connector, Undersized supply cable for configured current, Blocked ventilation around Hyundai wallbox
How to Fix / Troubleshooting
Safety first: If the housing or cable is too hot to touch comfortably, stop charging and turn off the breaker.
- Inspect connector: Look for discoloration, melting, or burn marks on the Type 2 plug and vehicle inlet.
- Check terminal tightness: With power OFF, open the wiring compartment and retighten all line, neutral, and earth terminals to the torque specified by Hyundai.
- Verify cable size: Ensure the supply cable cross‑section matches the charger’s maximum current rating per local code.
- Improve ventilation: Clear obstructions and avoid installing the charger in a sealed cabinet.
- If damage is visible: Replace the affected cable, connector, or terminal block. Do not continue using overheated components.
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Repair Difficulty
Medium
3/5
Required Part
Input Terminal Block / Type 2 Connector
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