E18
Gosund Third‑Party Integration / API Token Failure

E18 error and thermostat cannot connect to voice assistants (Alexa/Google) despite being online

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Possible Causes

Expired or corrupted integration token, Cloud account desynchronization, Outdated firmware not supporting current APIs, Region mismatch between Gosund and voice assistant accounts

How to Fix / Troubleshooting

Safety: No electrical work is needed.

  • Step 1 – Relink accounts:
    • In the Gosund app, unlink any existing Alexa/Google integrations.
    • In the Alexa/Google Home app, remove the Gosund skill/service.
    • Re‑add the Gosund skill/service and sign in again to refresh tokens.
  • Step 2 – Check region and language:
    • Ensure your Gosund account region matches the region of your voice assistant account.
    • Set the thermostat name to something simple (e.g., “Hall Thermostat”).
  • Step 3 – Firmware update:
    • Update thermostat firmware via the Gosund app.
  • Step 4 – Contact support if E18 persists:
    • If the thermostat is online and other cloud functions work, but E18 remains, Gosund may need to reset your device’s cloud profile or replace the unit if its integration firmware is corrupted.
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Repair Difficulty

Very Easy 1/5

Required Part

Cloud Integration Firmware (Main Control PCB)
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