What are the acceptable temperature setting ranges for heating and cooling?
The heat temperature range is 40° to 90°F (4.5° to 32°C), and the cool temperature range is 50° to 99°F (10° to 37°C). If temperature settings do not change, ensure you are setting temperatures within these acceptable ranges. (Page 11)
From the official Honeywell Pro Th4210D manual, page 11
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