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error Honeywell
Error Code E02
Invalid Wi-Fi password. The thermostat cannot connect to the home network with the entered password.
? What Causes This
Incorrect Wi-Fi network password entered during setup.
✓ How to Fix It
- Re-enter the correct password for your home Wi-Fi network.
- Repeat the setup process and confirm your password is correct.
Source: page 61 of the official manual
From the manual
This error code appears in:
Honeywell RTH6580WF Wi-Fi Smart Thermostat