Safety first: No mains wiring work is required for pairing.

Steps to troubleshoot:

1. Exclude/reset first:
- Perform a network exclusion or factory reset on the Heatit thermostat as per manual.
2. Bring gateway closer:
- Move the gateway within a few meters of the thermostat during inclusion.
3. Use correct inclusion mode:
- Start inclusion on the gateway, then press the thermostat's inclusion button sequence within the time window.
4. Check frequency and region:
- Ensure the thermostat's Z-Wave frequency matches your gateway's region.
5. Update gateway and device firmware:
- Ensure both are running current firmware versions.

Thermostat cannot be added to Z-Wave or Zigbee network

Possible Causes