Lectron No AC Supply / Internal Fuse Open

Lectron EV home charger has no power at all; display is blank and no LEDs are lit.

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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

Tripped upstream breaker, Loose line connections at Lectron terminal block, Blown internal control fuse on main board

How to Fix / Troubleshooting

Safety first: Treat all wiring as live until proven otherwise. Turn OFF the breaker and verify with a tester before touching conductors.

  • 1. Check the breaker: Locate the dedicated breaker for the Lectron charger in your panel. Reset it fully OFF then ON. If it trips immediately, stop and call an electrician.
  • 2. Test the outlet (plug-in models): Plug another high-load device (e.g., space heater) into the same outlet to confirm power is present.
  • 3. Inspect internal connections: With power OFF and cover removed, verify that line conductors are firmly attached to the Lectron input terminal block and that no wires have pulled out.
  • 4. Check internal fuse (if accessible): Some Lectron models include a small control fuse on the main board. Remove it and test for continuity with a multimeter. Replace only with the exact same type and rating if blown.

Next steps: If power is present at the input terminals but the unit remains dead, the internal power supply on the main control board has likely failed. Replacement of the main control board or entire unit is required.

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Repair Difficulty

Medium 3/5

Required Part

Lectron Main Control Board / Internal Control Fuse
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