1-Week Programmable Thermostat Support; 5-2 Day Programmable Thermostat Support; Single-stage Programmable Thermostat Support; Pro 2000 Horizontal Programmable Thermostat Support; T6 Pro Smart Thermostat Support; T5/T5+ Smart Thermostat Support This thermostat works on 24 volt systems. It will NOT work on 120/240 volt systems. This thermostat contains a Lithium battery which may contain Perchlorate material. Perchlorate Material—special handling may apply. See www.dtsc.ca.gov/hazardouswaste/perchlorate. Get support for your WIFI 7-DAY PROGRAMMABLE THERMOSTAT, from installation and manuals to troubleshooting tips and replacement information. Get support for your T6 PRO PROGRAMMABLE THERMOSTAT, from installation and manuals to troubleshooting tips and replacement information. Operating Manual 69-2727ES—01 2 About your new thermostat Your new Honeywell thermostat has been designed to give you many years of reliable service and easy-to-use, push-button climate control. Features • Backlit display on RTH2300 • Displays ambient (measured) temperature at all times • One-touch access to setpoint temperature wl9wY.