Thermostat cannot be discovered or paired with the Danfoss mobile app during setup.

Safety first: No electrical risk; this is a communication and configuration issue.

Steps to diagnose and fix:

• 1. Update the app: Install the latest version of the Danfoss app from the official app store.
• 2. Check phone connectivity: Ensure your smartphone is connected to the same 2.4 GHz Wi‑Fi network that the thermostat will use. Disable VPNs that may interfere.
• 3. Enable pairing mode: On the thermostat, enter commissioning or pairing mode as described in the manual (often via a specific menu or button sequence). Confirm that a pairing icon appears.
• 4. Enable Bluetooth/NFC: If your model uses Bluetooth or NFC for initial setup, ensure these are enabled on your phone and that you are within a few centimetres of the thermostat when prompted.
• 5. Reset network settings: If pairing repeatedly fails, reset the thermostat's network settings or perform a factory reset, then retry the setup process.

When to call a professional: For large installations or integration with building management systems, commissioning should be done by a trained technician.