KitchenAid KDTM704 dishwasher will not connect to Wi-Fi or the manufacturer's app

The checks in more detail

In the app, add the dishwasher and follow the instructions, which have you press and hold the Wi-Fi button, shown on the panel, until a light flashes; if it never flashes, hold the button longer or check the manual for the exact sequence for this model. Keep the phone close to the dishwasher during setup, and make sure the phone is on the 2.4 GHz network, since many appliances join only that band. The router matters. A dishwasher is usually under a counter, surrounded by metal and stone, and far from the router, so its signal is weak.

Move the router closer, add a mesh node or extender in the kitchen and avoid placing the router behind appliances. Use WPA2 and a simple password, and avoid a merged band name for setup. A router with MAC filtering, a guest network with isolation or a very wide channel can block it. Reserve an address for the dishwasher if the router lets you. After a power cut or a router change, the dishwasher may lose its connection, so reconnect it. If the app shows the dishwasher offline, restart the router, then the dishwasher by switching it off at the breaker for a minute, and add it again if necessary.

Update the app and the dishwasher's software, which it downloads when connected. Remote Start needs the dishwasher to be set to allow it, usually by closing the door and pressing a Remote Enable button, so a remote start that does nothing may need that. If setup fails repeatedly, reset the Wi-Fi settings on the panel, as in the manual, remove the dishwasher from the app and add it again. The dishwasher works fully without Wi-Fi. Contact KitchenAid with the model number if setup never completes.