E13
BYD Contactor Feedback / Stuck Relay Error

Charger displays E13 and charging stops shortly after starting; may repeat several times.

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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

Main contactor not closing fully, Welded or sticking relay contacts, Faulty contactor feedback sensor on main PCB, Mechanical obstruction or coil failure in contactor

How to Fix / Troubleshooting

Safety first: Do not attempt to tap or force the contactor. Turn off power at the breaker.

  • Listen during start: When starting a charge, you should hear a clear click from the internal contactor. No click or a buzzing sound suggests a problem.
  • Do not keep retrying: Repeated attempts can overheat the contactor coil or damage the relay.
  • Professional service: A technician should open the BYD charger, inspect the main contactor for discoloration or mechanical damage, and test coil resistance.
  • Replace contactor: If contacts are welded or the coil is open, replace the contactor with the exact BYD-specified model.
  • Check feedback circuit: If the contactor is good, test the feedback sensing circuit on the main control PCB and replace the board if faulty.
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Repair Difficulty

Professional Required 5/5

Required Part

Main Contactor Relay
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