How To Replace Battery In Honeywell Thermostat Chronotherm Iii. When i was replacing its batteries, i dropped it, causing a crack in the plastic window. If you have custom programmed your honeywell to fit your schedule, but your schedule has changed, consider resetting the programmed options and adapting them to your new schedule.
We recommend set the system switch to off. The replace battery display started flashing. Honeywell chrono iii choose adaptive intelligent recovery or conventional recovery using screw on back of thermostat.
The chronotherm iii had only four wires connected r (also jumped to rc), w, y, and g.
Replace the old honeywell thermostat battery or batteries with fresh alkaline aa batteries. For service, contact your local heating and cooling contractor. I'd let it sit without the batteries for an hour or. Chronotherm iii features monitor thermostat operation, read current time and room temperature at a glance.check status lights to see if the thermostat is on and saving energy, even in the dark (some models only).