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error Finder
Error Code ER3
Data connection was made but communication with the cloud resulted in failure due to corruption issues or extremely disturbed lines.
? What Causes This
Corrupted connection during cloud interaction, leading to data loss and disturbed signal propagation.
✓ How to Fix It
Check WiFi strength and stability. Update firmware if available through Finder YOU app. Reinitialize WiFi settings on device.
Source: page 20 of the official manual
From the manual
This error code appears in:
Finder IB1C91 Bliss Wifi Chrono Thermostat