Honeywell RTH8500D Operating Guide
Operating Manual
69-1901EF—02 2
About your new thermostat
Congratulations! You’ve just purchased the world’s most advanced, easy-to-use thermo-
stat. It has been designed to give you many years of reliable service and touchscreen
climate control.
stat. It has been designed to give you many years of reliable service and touchscreen
climate control.
Features
• 7-day program schedules maximize comfort and economy.
• Armchair programming: Just pull thermostat from the wall to set schedules.
• Energy-saving settings for maximum cost savings.
• One-touch temp control overrides program schedule at any time.
• Precise comfort control keeps temperature within 1°F of the level you set.
• Change/check reminders let you know when to replace filters and batteries.
• Large touchscreen display with backlight is easy to read—even in the dark.
• Armchair programming: Just pull thermostat from the wall to set schedules.
• Energy-saving settings for maximum cost savings.
• One-touch temp control overrides program schedule at any time.
• Precise comfort control keeps temperature within 1°F of the level you set.
• Change/check reminders let you know when to replace filters and batteries.
• Large touchscreen display with backlight is easy to read—even in the dark.