What are the acceptable temperature setting ranges for the T6 Pro Thermostat?
The acceptable temperature range is 40–90°F for heat and 50–99°F for cool. If your temperature settings are not changing, verify that your desired temperature falls within these ranges. (Page 2)
From the official Honeywell T6 Pro Thermostat manual, page 2
Have a follow-up question?
Answers from the official manual.
Common questions