Honeywell International Inc. THX9421R02 Manual De Usuario

 Setting system mode

1 Touch 

 to display system settings.

2  Touch desired option:

Heat: Thermostat controls only the 
heating system.

Cool: Thermostat controls only the 
cooling system.

Off: Heating/cooling systems are off.

Automatic: Thermostat selects heating 
or cooling as needed depending on the 
indoor temperature.

Emergency Heat (heat pumps 
with aux. heat): Controls auxiliary/ 
emergency heat. Compressor is locked 
out.

3 Touch 

 to save and exit.

The Automatic and Emergency 

Heat system settings may not appear, 
depending on how your thermostat was 
installed.