E05
Chevrolet
Control Board Overvoltage / Surge Protection Trip
Charger displays E05 and will not initiate charging; may occur after a power surge or lightning event.
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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
Recent power surge or lightning strike, Failed MOV/surge suppressor on control board, Damaged main control PCB, Incorrect line voltage (over 250 V) from utility
How to Fix / Troubleshooting
Safety first: If you suspect a lightning strike or major surge, do not reset repeatedly. Inspect for burning or smoke before re-energizing.
- Step 1 – Disconnect power: Turn OFF the breaker and leave the charger de-energized for at least 10 minutes to allow internal protection circuits to reset.
- Step 2 – Visual inspection: Remove the front cover (if allowed by the manual). Look for charred components, cracked MOVs (disk-shaped surge parts), or burnt smell on the control board.
- Step 3 – Check whole-home surge protection: If your panel has a surge protector, verify its status indicators. A failed protector may have allowed excess energy into the charger.
- Step 4 – Restore power and test: Turn the breaker back ON and see if E05 clears. If the error returns immediately, the control board or surge components are likely damaged.
- Step 5 – Board replacement: Replacement of the Chevrolet charger main control PCB or surge module should be done by an authorized service provider.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB with Surge Protection Network
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