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error Finder
Error Code ER0
Generic error indicating an unspecified issue with the Wi-Fi connection or other internal errors.
? What Causes This
Unknown specific cause, generic network or internal failure.
✓ How to Fix It
Perform a force sync by long pressing the 'Finder' logo while off until moving dashes appear. Ensure correct settings and proximity to router.
Source: page 20 of the official manual
From the manual
This error code appears in:
Finder IB1C91 Bliss Wifi Chrono Thermostat