What is the operating temperature range for the T3 Pro thermostat?
The thermostat's operating ambient temperature range is 32°F to 102°F (0°C to 38.9°C). The heat setpoint range is 32°F to 90°F, and the cool setpoint range is 50°F to 99°F. (Page 10)
From the official Honeywell T3 Pro Programmable Thermostat manual, page 10
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