E20
Lucid Contact Bounce / Relay Chatter Detection

Display shows E20; charger starts then immediately stops, repeating 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

Weak or failing main contactor coil, Low control voltage from Lucid control board, Loose high-current terminals causing voltage sag

How to Fix / Troubleshooting

Safety first: Turn OFF the breaker. Do not continue to operate a chattering contactor; it can overheat.

Steps:

  • Listen for chatter: Confirm rapid clicking from the Lucid charger when attempting to start.
  • Inspect terminals: With power OFF, tighten all high-current lugs on the contactor and output terminals to Lucid-specified torque.
  • Check supply voltage: Ensure the branch circuit is not undersized or overloaded, causing voltage dips when the contactor closes.

Resolution: If chatter continues, replace the Lucid main contactor or power module. If low control voltage is suspected, the control board may also need replacement.

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Repair Difficulty

Professional Required 5/5

Required Part

Lucid Main Contactor / Power Module
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