Same issue for me. Code is N416. I restarted the thermostat and the
error message went away. Two days later the error message is back.
Despite the error code, the thermostat appears to be functioning
correctly and heating the space based on the sched...
This started happening to me a few days ago. Found this thread and doing
a restart fixed the issue initially, but two days later it’s back. As
noted in another comment, the thermostat still seems to be working and
heating as scheduled. Not sure where...