Honeywell Home Smart RTH6580WF1003 Series User Manual page 37

Troubleshooting
Error Code
E01
During Wi-Fi Setup, the router
lost power.
E02
Invalid Wi-Fi password. This
code displays for 30 seconds,
then the thermostat will re-
enter Wi-Fi Setup mode.
Error Code
E42
Router is not issuing
an IP address to the
thermostat.
E43
No internet con-
nection. Thermostat
cannot communicate
to Total Connect
Comfort.
E99
General error
Action
• Ensure your router has power.
• If trying to connect to a hidden or manually added network,
confirm the router has power and is working.
• Re-enter password for your home Wi-Fi network.
• Repeat setup process and confirm your password for your
home Wi-Fi network.
Action
• Wait for 30 minutes, connection can
take several minutes.
• If still no connection, remove
thermostat from wallplate for 10
seconds, then reconnect it (see
page 16).
• Verify your router is correctly setup to
automatically give IP addresses.
• Make sure the Internet cable is
plugged in.
• Reboot the router.
Remove thermostat from wallplate for 10
seconds, then reconnect it (see page 16).
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