Lectron Overheating Due to Poor Connections or Overload

Lectron charger enclosure becomes very hot to the touch during normal charging, even in mild ambient temperatures.

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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 line terminals at Lectron input block, Undersized supply wiring causing excessive heating, Failing main power contactor with high contact resistance

How to Fix / Troubleshooting

Safety first: If the enclosure is too hot to touch comfortably or there is a burning smell, stop charging immediately and turn OFF the breaker.

  • 1. Check load vs. rating: Confirm that the Lectron charger’s maximum current matches the circuit and that the EV is not configured to draw more than the EVSE rating.
  • 2. Inspect terminals: With power OFF, open the unit and check that all input and output terminals are tight and show no signs of discoloration or melting. Retorque to manufacturer specs if loose.
  • 3. Examine contactor: Look for heat discoloration around the main power contactor. A failing contactor can run hot even at normal current.

Resolution: Replace any overheated components (contactor, terminal block, wiring). If overheating persists, consult an electrician to verify circuit sizing and voltage drop.

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Repair Difficulty

Hard 4/5

Required Part

Lectron Input Terminal Block / Main Power Contactor
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