Heidelberg
Thermal Damage / Component Overheating
Plastic housing or plug emits a noticeable burnt or chemical smell during or after 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 high‑current connection, Overloaded circuit beyond rated current, Degraded plastic near hot components, Internal arcing at terminal or contactor
How to Fix / Troubleshooting
Safety first: A burning smell is a serious warning. Stop charging immediately, unplug the vehicle, and isolate power at the breaker.
- 1. Visual inspection:
- After cooling, open the housing and inspect for discoloration, soot, or melted plastic around the contactor, terminals, and cable entries.
- 2. Tighten connections:
- Check all high‑current terminals and retighten to specified torque.
- 3. Replace damaged parts:
- Any charred or melted components (contactor, terminal block, cable insulation) must be replaced.
- 4. Verify circuit rating:
- Ensure the charger’s maximum current setting does not exceed the supply cable and breaker rating.
- 5. Test under supervision:
- After repairs, perform a supervised test charge while monitoring temperature and smell.
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Repair Difficulty
Hard
4/5
Required Part
Input Terminal Block
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