Nest thermostat cannot be added to the Nest or Google Home app (pairing fails)

Note: This is a pairing and account issue, not an HVAC wiring problem.

• Phone settings: Enable Bluetooth and location services on your phone. Close and reopen the Nest or Google Home app.
• Reset Nest pairing: On the Nest, go to Settings > Reset > Account connection (or similar) to remove previous account links.
• Restart devices: Restart both the Nest thermostat and your phone.
• Firmware update: If possible, connect the Nest to Wi‑Fi first and allow it to update before pairing.
• Hardware failure: If multiple phones cannot detect the Nest during setup and other radios work, the Nest’s Bluetooth/setup radio may be faulty and the thermostat may need replacement.