Hue dimmer switch v2 routine, schedule or automation is not running

The checks in more detail

The brighter and dimmer buttons change the level while held, and the Hue button cycles scenes. If the dimmer does nothing, the assignment may be missing, the battery low or the bridge offline. Automations in the Hue app, such as a routine at sunset, are separate from the dimmer, and a routine can run when a button is pressed. If the dimmer controls the wrong room, reassign it. After a reset or a long battery swap the assignments are gone, so rebuild them. Keep the setup simple, because a dimmer with a tangle of time-based scenes confuses guests.

A good pattern is the on button for the usual light, the off button to turn off the room and the Hue button for a relaxing scene. If the lights respond slowly, check the bridge's connection and the number of devices in the room, since a large group takes a moment to change. The dimmer works without internet because it talks to the bridge locally, so an automation that fails when the internet is down is probably cloud-based and not the dimmer's own. Matter and Apple Home or Google Home can also reach the dimmer's scenes through the bridge.

Review the assignments every few months, especially after adding rooms or changing lights, because new rooms are not assigned to existing buttons automatically. A tip for households is to give each room's dimmer a different default scene, with a warm scene on the bedroom's and a bright one on the kitchen's, so that people know what to expect. Name the dimmers clearly in the app, such as Living room, so that you do not assign the wrong one. If you replace the lights in a room, check that the dimmer's room assignment includes them, because new bulbs are not added to old scenes by default.