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EnergyFaults — error codes and troubleshooting for energy devices
EV ChargersWall Connector
3 red blinks

Tesla

Tesla 3 red blinks

Thermal throttle; current reduced

Severity

Moderate

Safe to continue?

Temporarily

Technician required?

Usually no

Last verified

September 2026

First safe check

Check that the unit has clear ventilation and is not exposed to direct sun during the hottest part of the day.

What does 3 red blinks mean?

Three red flashes interrupting a streaming green pattern indicate that the unit is charging but has reduced the charging current because of elevated temperature. Charging continues at a lower rate, and full current returns as the unit cools.

Which models use this code?

Verified for

  • Tesla — Wall Connector

Most likely causes

01

High ambient temperature

Common

The enclosure is operating in hot conditions, typically a garage or wall in direct afternoon sun.

02

Obstructed airflow

Possible

Stored items or a cover reduce heat dissipation around the unit.

Safe checks you can perform

  1. 1

    Clear the area around the unit

    Remove anything stored against the charger and confirm it is not covered.

  2. 2

    Charge at a cooler time of day

    Schedule charging for the evening or early morning to confirm the behaviour is temperature-related.

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

Related symptoms

Not charging at all

Related fault codes

1 red blinkMeaning pending official confirmation2 red blinksMeaning pending official confirmation4 red blinksMeaning pending official confirmation5 red blinksMeaning pending official confirmation6 red blinksMeaning pending official confirmation8 red flashesConfigured current incompatible with vehicle

Sources

  • Tesla Wall Connector Support — Troubleshooting

    View
    Manufacturer
    Tesla
    Document version
    —
    Section / page
    Troubleshooting — thermal throttling
    Verified
    September 2026

    Streaming green interrupted by three red flashes indicates the unit reduced current due to elevated temperature.

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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.