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EnergyFaults — error codes and troubleshooting for energy devices
EV ChargersWall Connector
Red flashes

Tesla

Tesla Red flashes

Fault detected; charging halted

Severity

High

Safe to continue?

No

Technician required?

Recommended

Last verified

September 2026

First safe check

Count the red flashes and note the pattern before doing anything else — the count identifies the fault.

What does Red flashes mean?

The Wall Connector displays red flash codes when an internal fault is detected, and charging stops until the fault is resolved or cleared. The number of flashes identifies which fault has been reported, so counting them is the first diagnostic step.

Which models use this code?

Verified for

  • Tesla — Wall Connector

Most likely causes

01

Fault condition reported by the indicator pattern

Manufacturer documented

The unit is signalling a specific internal fault through the number of red flashes. Reference the pattern before assuming a wiring problem.

02

High temperature during charging

Possible

Streaming green interrupted by three red flashes indicates the unit has reduced charging current to protect itself at elevated ambient temperature.

03

Overcurrent configuration mismatch

Possible

On Gen 1 units connected to a vehicle requiring a lower current limit, an incompatible configured current can trigger a specific multi-flash pattern.

Safe checks you can perform

  1. 1

    Count the red flashes

    Note the exact number and whether the pattern repeats continuously or only when charging starts.

  2. 2

    Cycle power at the dedicated breaker

    Switch the dedicated circuit breaker off, wait briefly, then restore it — the manufacturer documents this as the first remedy for a persistent red indication.

  3. 3

    Check ventilation

    Confirm the unit is not covered and has clear space around it, since thermal throttling is one of the documented red-flash behaviours.

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?

Documented reset behaviour: sometimes. Use only the manufacturer-approved restart sequence for this device and never bridge or bypass a safety mechanism to clear a fault.

Related symptoms

Red light on chargerNot charging at all

Related fault codes

3 red blinksThermal throttle; current reduced8 red flashesConfigured current incompatible with vehicleSolid red lightMeaning pending official confirmationFlashing red lightMeaning pending official confirmation1 red blinkMeaning pending official confirmation2 red blinksMeaning pending official confirmation

Sources

  • Tesla Wall Connector Support — Troubleshooting

    View
    Manufacturer
    Tesla
    Document version
    —
    Section / page
    Troubleshooting — red indicator
    Verified
    September 2026

    Red flash codes indicate that the Wall Connector has detected a fault and has stopped charging until the fault is cleared.

  • Tesla Wall Connector Installation Manual

    View
    Manufacturer
    Tesla
    Document version
    —
    Section / page
    Indicator lights
    Verified
    September 2026

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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.