Diagnosis
The dishwasher is stuck in pairing mode, usually because the initial setup via the SmartThings app got interrupted or your home network's settings are incompatible (like using WPA3-only security or a 5GHz-only band).
How to Fix It
You need to do a hard reset of the Wi-Fi module. Press and hold the Wi-Fi button on the control panel for about 10 seconds until you hear a beep and the light turns off. This clears the old pairing data. Then, go through the setup in the SmartThings app from scratch. Make sure your phone is on your home's 2.4GHz Wi-Fi network during setup—the dishwasher doesn't connect to 5GHz.
If That Didn't Work
Check your router. If you have a combined network name (SSID) for 2.4GHz and 5GHz, some routers have trouble with IoT devices. Try temporarily creating a separate 2.4GHz network with a different name (like "Home-2G") and WPA2 security, then connect the dishwasher to that. Also, ensure your router isn't using MAC address filtering that's blocking the dishwasher.
Heads Up
The connection process is finicky. Have your Wi-Fi password ready and do the setup close to the dishwasher. If your internet goes down or the router reboots, the dishwasher will usually reconnect automatically, but if it doesn't, you might have to repeat the reset process.