Sensibo AC Controller Not Connecting or Controlling

Sensibo turns any mini-split, window AC, or portable air conditioner into a smart device by sending infrared commands. The IR-based control introduces unique challenges that traditional smart thermostats do not have. Here is how to troubleshoot the most common Sensibo problems.

Device Not Connecting to WiFi

1. Confirm your WiFi is 2.4GHz. Sensibo does not support 5GHz. Split bands if using a combined SSID.
2. Hold the button until the LED flashes rapidly (about 5 seconds) to enter pairing mode.
3. Keep your phone near the device during setup.
4. Grant location permission on Android -- required for WiFi scanning.
5. If the app says offline but your router shows it connected, check if Sensibo servers are down. Their status page or social media will mention outages.
6. Factory reset: Hold the button for 10 seconds until the LED blinks in a new pattern.

AC Not Responding to Commands

This is the most common Sensibo issue and almost always involves the IR signal:

1. Point the IR transmitter at the AC's receiver -- usually behind a small dark window on the front panel. Line of sight is required.
2. Select the correct AC brand and model in the app. If yours is not listed, try other models from the same brand -- many share IR protocols.
3. Test with the app's Test button. If the AC does not respond, try the next profile.
4. Check for IR interference. Bright sunlight and certain LED bulbs produce IR that drowns out the signal.
5. Learn custom commands if built-in profiles fail. Point your original remote at the Sensibo and press buttons to record signals.

Air Pro vs Air vs Sky

• Air Pro: Temperature, humidity, and PM2.5 air quality sensor.
• Air: Temperature, humidity, and motion sensor for presence-based automations.
• Sky: Basic temperature and humidity only.
• All three have the same IR control and platform support (Alexa, Google, HomeKit, HA).

Climate React Not Working

1. Space out your on/off thresholds. If they are too close (e.g., on at 78, off at 77), the AC cycles constantly.
2. Climate React runs in the cloud, so it requires internet. If WiFi goes down, the AC stays in its last state.
3. Check sensor placement. If the Sensibo is in direct sunlight or near a heat source, it reads high and triggers cooling unnecessarily.

Geofencing Issues

1. Set location to "Always" on iOS. On Android, allow background location and exempt from battery optimization.
2. Adjust geofence radius. Larger radius starts cooling earlier so the room is ready when you arrive.
3. Add household members so the AC stays on when anyone is home.
4. Inconsistent triggers? Usually caused by your phone's OS killing the app in the background. Check battery optimization settings.

Home Assistant Integration

Sensibo has a built-in HA integration using the Sensibo cloud API. Generate an API key at home.sensibo.com/me/api. Each device appears as a climate entity with mode, temperature, and fan speed controls, plus temperature and humidity sensors. Air quality data is included for Pro models.

When to Contact Sensibo Support

Contact Sensibo if the IR LED is not visible through a phone camera when sending commands (it should show a faint purple flash), the device will not enter pairing mode after factory reset, or sensor readings are wildly inaccurate despite proper placement. One-year warranty covers hardware defects.