English (EN) KB. Download. Visit here to find the thermostat model you are looking for and get the help you need Download link. T3 thermostat pdf manual download. The Thermostat is powered byx AA batteries, although a battery icon is not shown on the display during normal use. View the manual for the Honeywell T3 here, for free. Looking for a Honeywell thermostat manual? This manual comes under the category thermostat and has been rated bypeople with an average of a This manual is available in t