Troubleshooting a Wall Connector

Wall Connectors can be identified by the part number on the side label, which will be displayed as TPN: 1529455-##-#. Customers should take a photo of the side label for their records.

To troubleshoot your Wall Connector, you will need the Quickstart Guide, your mobile device and access to Wall Connector.

Tesla Apps for Wall Connector

Use the Tesla app to control, schedule and get data on your Wall Connector, whether you own a Tesla vehicle or another electric vehicle. To complete your Wall Connector setup, follow the recommended steps to register your Wall Connector and connect it to your home Wi-Fi network.

Installers can complete the commissioning process in the Tesla One app, including selecting circuit breaker settings, configuring power sharing and connecting to Wi-Fi.

Commissioning and Connecting to Wi-Fi

Below is a step-by-step guide for the Commissioning and Wi-Fi Connectivity process. If you or your installer have already registered and connected your Wall Connector in the Tesla app, there is no need to continue below.

Wall Connectors automatically receive firmware updates when connected to Wi-Fi. The first step for all troubleshooting is to ensure your Wall Connector is commissioned correctly so that it can charge properly and download the most recent firmware for the best performance and latest features.

Note: Before following the steps below, have your Quickstart Guide and home Wi-Fi network password ready and ensure your Wall Connector is unplugged from your vehicle. Keep your Wall Connector unplugged from your vehicle throughout the entire commissioning process. If you lost your password and cannot access your Quickstart Guide, use the Diagnose button below. Have your Tesla part number and Tesla serial number available.

To commission your Wall Connector, the setup is completed within the Tesla One app.

To successfully commission the Wall Connector, scan the QR code located on the front of the installation Quickstart Guide included with the packaging. This QR code provides the unique credentials to connect to the unit, enable power sharing, connect to Wi-Fi, and set the circuit breaker rating and output amperage.

Once set-up is complete in the Tesla One app, residential customers can register their Wall Connector in the Tesla app to access more features, including charging stats and history.

For more information on how to commission Wall Connector, watch the video below.

Connect the Wall Connector to local Wi-Fi to automatically receive firmware updates. New features and functionality will be rolled out over time.

Offline Firmware Updates

The best way to keep your Wall Connector up to date is to connect to local Wi-Fi. If this is not possible, firmware updates can be manually installed by following these steps:

  1. Download the firmware file.
    Save the file locally on the device you will be using to connect to your Wall Connector. We recommend using a mobile device, tablet or laptop. Download below:
    Firmware 23.24.4
  2. Connect to your Wall Connector Wi-Fi access point.
  • Follow steps one through six above to commission the installation. The network name (SSID) and password (WPA2) details can be found on the Quickstart guide that came with your Wall Connector.
  • Note: If the Quickstart guide is unavailable and you cannot locate your password, use the diagnostic tool. Have your Tesla part number and Tesla serial number available.
  1. Navigate to update page.
  1. Install the firmware file.
  • Select ‘Choose File’ and then upload the Wall Connector firmware file. Click ‘Upload’ and wait for up to one minute.
  1. Confirm the firmware update.
  • A success message will be displayed if the manual firmware update is successful. Your Wall Connector may reboot.
  • If a failure message appears, power cycle your Wall Connector by turning the circuit breaker off and back on again and then try uploading the firmware update again.
Troubleshooting Wall Connector Fault Codes

The table below displays common fault codes and their solutions. Use these codes to diagnose the issue with your Wall Connector.

All red blink codes pause for one second, and then repeat.

Light Status Issue Solution
No lights Power supply issue, charging disabled Verify that the power supply is turned on. If the issue persists, have an electrician remove the Wall Connector from the wirebox and confirm that voltage is present at the terminal block using a multimeter. Record voltage readings:

1. Line 1 to Line 2
2. Line 1 to Ground
3. Line 2 to Ground
Solid red Internal fault, charging disabled Turn the circuit breaker off, wait 5 seconds, and turn it back on. If solid red light remains, document part number and serial number, then contact Tesla.
One red blink Ground fault circuit interruption due to unsafe current path, charging disabled. Inspect the handle, cable, Wall Connector and vehicle charge port for damage or signs of water ingress. Have an electrician check that earth ground is not directly connected to a conductor wire in the branch circuit.
Two red blinks Ground assurance fault, high ground resistance detected, charging disabled. Verify that the Wall Connector is properly grounded. The Ground connection must be bonded in the upstream power supply for proper operation. Check all physical connections, including the wirebox terminals, electrical panel(s), and junction boxes. In residential power supplies, check the bond between Ground and neutral at the main panel. If connected to a step- down transformer, contact the transformer's manufacturer for direction on how to bond the ground connection.
Three red blinks High temperature detected; charging limited or disabled Connect Wall Connector to Wi-Fi so that firmware can update to most recent version.
Check the faceplate and cable handle for excessive warmth. Have an electrician remove the Wall Connector from the wirebox and verify that the conductors used are sized correctly and that the terminal block is torqued to specification.
Three red blinks, with green streaming High temperature detected; charging is limited Charging amperage has been reduced due to high temperatures.
Connect Wall Connector to Wi-Fi so that firmware can update to most recent version.
Four red blinks Internet connection lost, online features disabled Check for objects that could interfere with the area's Wi-Fi signal strength. Confirm that the local Wi-Fi router is operational. If the Wi-Fi password was changed recently, follow the commissioning process on your mobile device to update the Wi-Fi settings.
Five red blinks Power-sharing communication issue, charging reduced Check for objects that could interfere with the area's Wi-Fi signal strength. Follow the commissioning process on your mobile device to re-link the Wall Connectors for power-sharing.
Six red blinks Overvoltage or poor grid quality detected, charging disabled Verify that the power supply is nominal 200-240 volts. If the issue persists, have an electrician remove the Wall Connector from the wirebox and confirm that voltage readings are as expected at the terminal block using a multimeter. Record voltage readings:

1. Line 1 to Line 2
2. Line 1 to Ground
3. Line 2 to Ground
Seven red blinks Vehicle overcurrent detected Reduce the vehicle's charge current setting. If the issue persists and the attached vehicle is manufactured by Tesla, record the vehicle's VIN and approximate time of the fault and contact Tesla. If the vehicle is not manufactured by Tesla, contact the vehicle's manufacturer.

Learn more about Wall Connector installations or how to replace a Wall Connector. If you have additional questions, contact Customer Support.