You have to temporarily change the driver for this thermostat to Virtual Thermostat (the pulldown for Type). After selecting Virtual Thermostat hit Save Device.
Once you do that you need to put this into setSupportedThermostatModes command, and hit that button:
["off","heat"]
Then put this into setSupportedThermostatFanModes command, and hit that button:
["off"]
Then you will see the settings under Current State for supportedThermostatFanModes and supportedThermostatModes showing the words in quotes, unlike what they show now.
Then, change the driver back to your current driver, and hit Save Device.
