E07
Andersen Output Contactor Welded or Stuck Closed

Charger displays E07; app indicates 'Contactor Welded / Stuck Relay'.

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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

Worn or welded contacts in Andersen output contactor, Short circuit event during previous charge, Faulty contactor drive circuit on main control PCB, Mechanical obstruction in contactor mechanism

How to Fix / Troubleshooting

Critical safety warning: A welded contactor can leave the output live when it should be isolated. Do not use the charger. Turn off the supply at the consumer unit and isolate the circuit.

User actions:

  • Switch OFF the dedicated breaker/isolator for the Andersen charger and leave it off.
  • Do not attempt to open the unit or tap the contactor to free it.

For a qualified EV technician:

  • Verify isolation and confirm no voltage at the output terminals.
  • Open the Andersen enclosure and inspect the output contactor assembly for signs of overheating or welding.
  • Test coil operation and contact resistance; replace the contactor assembly if any fault is found.
  • Check the main control PCB contactor drive circuit for over‑voltage or stuck drive signals.

The contactor assembly is a safety‑critical component and should be replaced with an Andersen‑approved part only.

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Repair Difficulty

Professional Required 5/5

Required Part

Output Contactor Assembly
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