E014
Siemens
Output Relay / Contactor Control Fault
Siemens wallbox shows E014; unit appears dead to the vehicle but display or LEDs may still be on.
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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
Failed relay driver on main control board, Broken coil wire on main contactor, Loose control wiring between board and contactor, Control board detecting inconsistent contactor feedback
How to Fix / Troubleshooting
Safety first: Isolate power before inspecting internal components.
- Listen for contactor: When starting a charge, listen for a distinct click from the main contactor. No click suggests a control or coil issue.
- Inspect control wiring: With power OFF, check the small-gauge wires from the main control board to the contactor coil and feedback contacts. Ensure terminals are tight and not corroded.
- Coil resistance test: A technician can measure the contactor coil resistance with a multimeter; an open circuit indicates a failed coil.
- Board output check: Using appropriate test equipment, verify that the control board is providing the correct voltage to the coil when a session is commanded.
If the contactor and wiring are good but E014 persists, the relay driver circuitry on the main control board is likely faulty and the board should be replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Power Contactor and Control Wiring
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