The four blinking red lines on the charger signify that your charger is having problems connecting to your WiFi network. Firstly, please check to see if your WiFi router is fully operational and connected to the internet.
If you have changed the password on your router recently you’ll need to update your charger with the new details. You can do this by following the instructions in the “check that the Tesla Wall Connector is connected to WiFi” section above.
If your router is fully connected and working but you are still experiencing problems with your charger connecting to it then your issue might be to do with signal strength in the area of your charger. We do ask customers to check the signal strength at the charger location before install but it’s also good practice to check the signal strength afterward too if you’re experiencing connectivity issues, especially if you’ve recently moved your router.
You can do this by bringing any WiFi enabled mobile device to the area where the charger is installed and checking the number of bars on the signal strength indicator (usually located on the top right corner of the screen if using a smartphone).