Humidifier mode changed

The Humidifier mode changed trigger fires after the operating mode of a humidifier entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more] changes. Modes are device-specific and typically include options like Normal, Eco, Sleep, Auto, or Baby, though the exact modes available depend on your device. Use Humidifier mode changed to react when the mode changes, for example to automatically lower the target humidity on all your humidifiers when one of them switches to Eco mode, keeping your whole home in sync with a single mode change.

You can optionally filter the trigger to fire only when the humidifier switches to a specific mode. Leave the mode option empty to fire on any mode change.

Using this trigger from the user interface

If you prefer building automations visually, Home Assistant walks you through this trigger step by step. You pick what to watch, tweak a few options, and save. No YAML knowledge required.

To use Humidifier mode changed in an automation, follow these steps:

1. Go to Settings > Automations & scenes.
2. Open an existing automation, or select Create automation > Create new automation.
3. In the When section, select Add trigger.
4. Select what you want to monitor. Under By target (see Targets), pick the area your humidifier is in (like your bedroom or living room). You can also select a device, a specific entity, or a label.
5. From the triggers shown for that target, select Humidifier mode changed.
6. Optionally, under Mode, select one or more modes you want to watch for. Leave it empty to trigger on any mode change.
7. Under Trigger when (see Behavior), pick Each, First, or All to control how the trigger behaves when multiple humidifiers are targeted.
8. Under For at least, set how long the humidifier must remain in the new mode before the trigger fires. Leave it at zero to fire immediately.
9. Select Save.

Options in the UI

Using this trigger in YAML

If you work directly in YAML, or you want to know exactly what Home Assistant does under the hood, this section has the technical reference. It lists the field names you use in YAML, their types, and which ones are required.

In YAML, Humidifier mode changed is referred to as humidifier.mode_changed. A basic example looks like this:

trigger: humidifier.mode_changed
target:
  entity_id: humidifier.bedroom

This fires every time the bedroom humidifier switches to a different mode.

To fire only when the humidifier switches to a specific mode:

trigger: humidifier.mode_changed
target:
  entity_id: humidifier.bedroom
options:
  mode: "sleep"

Options in YAML

YAML sometimes provides additional options for more complex use cases that are not available through the UI.

Targets of the trigger

This trigger requires a target. The target is the object that Home Assistant will watch. You can select a single entityAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more], a device, an area, a floor, or a label as a target, and Home Assistant will watch every matching humidifier entity behind that target.

• Entity: one specific humidifier entity, such as humidifier.living_room.
• Device: every humidifier entity that belongs to a device.
• Area: every humidifier entity in a room or area.
• Floor: every humidifier entity on a floor.
• Label: every humidifier entity that shares a label.

You can also select different target types in one trigger. For example, you can add a specific entity and an area as targets in the same trigger to monitor both of them at once.

Behavior with multiple targets

When you target more than one entity (or select an area, floor, or label that contains several), the Trigger when option controls how the trigger responds:

• Each (any in YAML, default): the trigger fires every time any one of the targeted entities transitions. For example, if you monitor three motion sensors in the living room and someone walks past sensor 1, the automation fires. When they walk past sensor 2 a moment later, it fires again. Every individual event counts.
• First (first in YAML): the trigger fires only on the first transition in the targeted group, then waits until all targeted entities have reset before it fires again. For example, if you monitor the same three motion sensors, the automation fires when the first one picks up movement (someone entered the room). The other two firing afterward are ignored, so you get one notification per “someone walked in” event instead of three.
• All (last in YAML): the trigger fires only after the last targeted entity in the group has fired, meaning all of them are now in the expected state. For example, if you monitor the lights in the living room, bedroom, and hallway, the automation fires only once all three have turned off. This is useful for scenarios like “start the robot vacuum only after every light on the floor is off,” so you know the room is truly empty.

Good to know

• The available modes depend entirely on the device. Check your humidifier’s documentation or the Home Assistant entity’s attributes to see which modes are supported.
• If you filter by mode, the trigger only fires when the humidifier enters that mode, not when it leaves it.
• To check whether the humidifier is currently in a specific mode during a condition step, use the Humidifier is in mode condition.

Try it yourself

Ready to test this? Go to Settings > Automations & scenes, create a new automation, and add this trigger. Save the automation, then change the state of the targeted entity to watch the trigger fire on your actual entitiesAn entity represents a sensor, actor, or function in Home Assistant. Entities are used to monitor physical properties or to control other entities. An entity is usually part of a device or a service. [Learn more].

More examples

Real scenarios where this trigger fires in automations and scripts. Copy any example and adapt it to your setup.

Automation: set the scene when the humidifier enters sleep mode

When the bedroom humidifier switches to sleep mode, dim the lights and activate the night scene so the room feels ready for rest.

• Trigger: Humidifier mode changed
• Target: Bedroom humidifier
• Mode: sleep
• Trigger when: Each
• Action: Light: Turn on (night scene)

alias: "Activate night scene on sleep mode"
triggers:
  - trigger: humidifier.mode_changed
    target:
      entity_id: humidifier.bedroom
    options:
      mode: "sleep"
      behavior: any
actions:
  - action: scene.turn_on
    target:
      entity_id: scene.bedroom_night

Automation: notify when any humidifier switches to Eco mode

When a humidifier in the house switches to Eco mode, send a notification confirming that energy-saving operation has started.

• Trigger: Humidifier mode changed
• Target: All humidifiers (by label)
• Mode: Eco
• Trigger when: Each
• Action: Send a mobile notification

alias: "Notify on Eco mode"
triggers:
  - trigger: humidifier.mode_changed
    target:
      label_id: all_humidifiers
    options:
      mode: "eco"
      behavior: any
actions:
  - action: notify.mobile_app_phone
    data:
      message: "A humidifier switched to eco mode."

Still stuck?

The Home Assistant community is quick to help: join Discord for real-time chat, post on the community forum with the trigger you’re using and what you expected to happen, or share on our subreddit /r/homeassistant.

Related triggers

These triggers work well alongside this one:

• Humidifier turned on: Triggers after one or more humidifiers turn on.

• Humidifier turned off: Triggers after one or more humidifiers turn off.