E10 error and thermostat cannot pair with Gosund app via Bluetooth or AP mode.

Safety: No high-voltage work is needed. Do not open the thermostat unless necessary.

• Step 1 – Confirm pairing procedure:
  • Follow the exact pairing steps in the Gosund app for your thermostat model (EZ mode vs. AP mode).
  • Ensure your phone is on 2.4 GHz Wi-Fi and Bluetooth is enabled.
• Step 2 – Reset pairing data:
  • On the thermostat, go to Settings > Reset > Network/Pairing.
  • In the app, remove any old instance of the thermostat.
  • Attempt pairing again within a few minutes of the reset.
• Step 3 – Reduce interference:
  • Move other 2.4 GHz devices (baby monitors, cordless phones) away from the thermostat during pairing.
  • Stand within 1–2 meters of the thermostat with your phone.
• Step 4 – Firmware update via USB/OTA (if available):
  • Some models allow firmware updates via the app or a service port; follow Gosund instructions to update.
• Step 5 – Replace thermostat if pairing hardware is defective:
  • If E10 persists across multiple phones and networks, the local pairing radio/module on the main PCB may be faulty.
  • Contact Gosund for a replacement.