E18
FLO
Contactor Feedback / Position Sensing Fault
Charger displays E18 / ‘Contactor Feedback Error’; unit may click but not start charging.
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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 contactor auxiliary contact, Broken feedback wiring to control board, Misaligned contactor mechanism, Faulty feedback input on control board
How to Fix / Troubleshooting
Safety first: Turn OFF the breaker and verify no voltage is present before opening the charger.
- Listen for contactor: When starting a charge, note whether you hear a click. E18 often appears when the board cannot confirm the contactor state.
- Technician inspection: A technician should open the unit and inspect the main power contactor, especially any auxiliary contacts used for feedback.
- Check wiring: Verify that the feedback wires from the contactor to the control board are intact and firmly connected.
- Test auxiliary contact: With power OFF, test continuity of the auxiliary contact in both energized and de-energized states.
- Replace faulty parts: Replace the main power contactor if its auxiliary contact is defective, or the main control board if the feedback input is not functioning.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Power Contactor
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