1-2 of 2 Answers
Hi Lon! The Honeywell 7-Day Programmable Thermostat with Wi-Fi requires a C wire, or “common wire” which enables the continuous flow of 24 VAC power to the thermostat; it does not use batteries. If you have additional concerns or questions, feel free to contact us at 1-800-468-1502 or through live chat at http://www.honeywellhome.com/en/support. - Jerry
Sorry, there was a problem. Please try again later.These thermostats do not have batteries. They have a large capacitor that stores energy for short term power outages. The programs are not lost.
Sorry, there was a problem. Please try again later.
