What are the available system modes on the T4 Pro thermostat?
The T4 Pro offers the following system modes: Auto, Heat, Cool, Off, and Em. Heat (emergency heat, available on TH4210U model only). Press the Mode button to cycle through available modes. Available modes may vary depending on your model and system settings.
From the official Honeywell T4 Pro Thermostat manual, page 2
Have a follow-up question?
Answers from the official manual.
Common questions