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EV ChargersWall Connector
8 red flashes

Tesla

Tesla 8 red flashes

Configured current incompatible with vehicle

Severity

Moderate

Safe to continue?

No

Technician required?

Recommended

Last verified

September 2026

First safe check

Disconnect the vehicle, note the flash count, and do not change the commissioned current yourself unless the manufacturer procedure for your unit documents it.

What does 8 red flashes mean?

Eight red flashes appear when a vehicle that cannot be charged at the configured current is connected to a Gen 1 Wall Connector — for example a vehicle requiring a limit of 48 A or below connected to a unit configured above that value. The unit refuses to start charging until the configured current is compatible.

Which models use this code?

Verified for

  • Tesla — Wall Connector

Most likely causes

01

Configured charging current above the vehicle requirement

Manufacturer documented

The unit was commissioned for a higher current than the connected vehicle supports in this configuration.

Safe checks you can perform

  1. 1

    Disconnect and note the pattern

    Unplug the vehicle and record the number of flashes.

  2. 2

    Contact the installer or manufacturer support

    The configured current is a commissioning parameter tied to the circuit wiring; it should be changed only by someone authorised to do so.

These steps stay outside the enclosure. Never open high-voltage equipment, bypass safety devices or work on live wiring.

When to stop troubleshooting

Stop and contact a qualified technician if the fault returns immediately, the device smells burnt, visible wiring damage exists, the enclosure is hot to the touch, or the manufacturer specifies professional service.

Can a reset clear this fault?

Reset behaviour is not documented for this code. Use only the manufacturer-approved restart sequence described in the device manual, and treat a code that returns immediately as an unresolved fault rather than a reset problem.

Related symptoms

Red light on chargerNot charging at all

Related fault codes

1 red blinkMeaning pending official confirmation2 red blinksMeaning pending official confirmation3 red blinksThermal throttle; current reduced4 red blinksMeaning pending official confirmation5 red blinksMeaning pending official confirmation6 red blinksMeaning pending official confirmation

Sources

  • Tesla Wall Connector Support — Troubleshooting

    View
    Manufacturer
    Tesla
    Document version
    —
    Section / page
    Troubleshooting — current configuration
    Verified
    September 2026

    Eight red flashes indicate that the connected vehicle cannot charge at the configured current of the Wall Connector.

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Disclaimer

EnergyFaults provides informational troubleshooting guidance. Electrical and high-voltage equipment should only be serviced by qualified professionals where required. Always follow the manufacturer documentation for your exact model.