E18
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Overtemperature Shutdown
Charger displays E18; app may describe it as overtemperature shutdown.
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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
Ambient temperature above specified limit, Blocked airflow around charger, Failing cooling path from heat sinks to housing, Degraded thermal interface material on power devices
How to Fix / Troubleshooting
Safety: Allow the charger to cool before touching the housing.
- Check installation location: Ensure the charger is not installed in direct sun or in a confined, unventilated space. Provide shade or ventilation if necessary.
- Clear obstructions: Remove any objects blocking vents or covering the charger housing.
- Inspect internal cooling: With power off, open the unit and verify that heat sinks are firmly attached to power components and that any thermal pads or paste are intact.
- Reduce current: Temporarily lower the maximum charging current in the app to reduce heat generation and test operation.
- Replace power board if overheating persists: If the charger overheats at modest currents in normal ambient conditions, the power board or thermal design components may be compromised and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Power Board Heat Sink Assembly
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