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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.
• Easy-to-follow menu programming.
• One-touch temp control overrides program schedule at any time.
• Large, clear, backlit display is easy to read — even in the dark.
• Displays both room temperature and temperature setting.
• Removable battery holder for fast, easy replacement.
• Built-in compressor protection.
Thermostat controls
M28401
Digital display Battery holder
Temperature buttons
Press to adjust
temperature settings.
Hold button
Press to override programmed
temperature control.
Function buttons
Press to select the function displayed just above each button.
(Functions change depending on the task.)