HomeKit Automations Not Working — Mysa for Mini-Splits

Last updated: June 4, 2026

Applies to: Mysa for Ductless Mini-Split Heat Pumps (and compatible window/portable AC control)

Does not apply to the Mysa Smart Thermostat (24V central HVAC). That product uses a different HomeKit integration path. If you have a Smart Thermostat, use the guides in the Mysa Smart Thermostat collection instead.

Also see the other product guides if you have multiple Mysa devices:

If your device responds to manual temperature changes in the Apple Home app but HomeKit automations do not run, this is often caused by temperature rounding in HomeKit automations.

Quick solution

Change automation target temperatures to half-degree values (for example, 22.5°C instead of 23°C, or 19.5°F offsets where applicable). Whole-number setpoints can prevent automations from firing on some Mysa models.

If the quick solution does not work

Try these steps in order:

1. Reset your HomeKit connection

  • Remove Mysa for Mini-Splits from the Home app.

  • In the Mysa app, confirm the device is online and paired.

  • In the Apple Home app, add the device again using the HomeKit setup code on the device sticker (or scan the QR code).

  • Recreate your automations. Mini-split models do not use the wall-thermostat arrow reset used on baseboard and in-floor products.

2. Check for schedule conflicts

  • Temporarily disable schedules in the Mysa app.

  • Make sure the device is not in Hold during the automation window.

3. Reset your Home hub

  • Restart the Apple TV, HomePod, or iPad that acts as your home hub.

  • In the Home app, confirm it is the primary home hub.

4. Test a simple automation

  • Create one automation affecting a single Mysa device.

  • Use a half-degree target temperature (for example, 21.5°C).

  • Confirm whether the issue affects one room or every Mysa device.

Related guides

For the overview and links to every product line, see HomeKit automations not working with Mysa thermostats.