Symptom

Some of my Zigbee Home Automation (ZHA) devices are now shown as unavailable or have suddenly stopped working.

Resolution

1. Refresh your browser page (Ctrl+Shift+R).
2. Power cycle the device.
3. Ensure you added the device to your network in its final position in your home and not just near the coordinator.
   • Many devices will maintain a weak connection to the router they first joined through instead of picking a new one nearby.
4. When adding new devices, add router devices before adding end devices.
   • Battery-powered devices are end devices.
   • Mains-powered devices are more likely to be router devices.
5. Make sure you have a few router devices distributed over the different areas of your home (depending on the size of your home).
6. End devices select a router when joining the network. This connection is not static. Sometimes the end device selects a router device that is far away or has a bad connection for other reasons. To force a device to connect to a router device nearby, perform the following steps:
   1. Under Settings > Devices & services, in the ZHA integration, select X devices.
   2. Select the router device closest to your end device.
   3. Select Add devices via this device.
   4. Set your end device into pairing mode.
      • The end device should now be connected to the selected router device.
7. Check the best practices to avoid pairing issues with Zigbee devices.

Related topics

• Best practices to avoid pairing issues with Zigbee devices