What are the acceptable temperature ranges I can set for heating and cooling?
The acceptable temperature setting range for Heat is 40°F to 90°F (4.5°C to 32.0°C), and for Cool it is 50°F to 99°F (10.0°C to 37.0°C). If you are unable to change temperature settings, ensure you are within these ranges. (Page 8)
From the official Honeywell T6 Pro Smart Thermostat manual, page 8
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