Hubitat Honeywell T6 Thermostat Driver Not Working

[bertabcd1234]

Did you first use a different driver with this device?

In any case, it sounds like this problem (and fix):

Error since new update

Yes, look at the device detail page for your thermostat device, particularly the "Current States" section in the top right. What are the values for supportedThermostatModes and supportedThermostatFanModes? I'm guessing they are malformed JSON. To fix, you can try something like this with whichever attribute (or both) is in the wrong format (substituting the appropriate values for your device if they are different): Depending on the driver you're using, a "Save Preferences" or "Configure" mig…