Some smart models of the Honeywell thermostats like the RTH9580WF we answer How Do You Lock a Honeywell Thermostat? Doing this keeps curious fingers from adjusting t-stat settings without first punching in a password. You create this secret code when locking your thermostat. Then, the thermostat asks you to enter this code to restore access … Continue reading How Do You Lock a Honeywell Thermostat