Honeywell T8400C1099 Manuale Utente

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3. Press the ▲ key to raise the temperature setting 

above the room temperature. Cooling system 
should shut down.

NOTE: To bypass the five-minute delay, see the 

Optional System Checkout section.

1. Slide the SYSTEM switch to Off and the FAN 

switch to On. The fan should run continuously.

2. Slide the FAN switch to Auto. In heating, the fan is 

controlled directly by the heating equipment and 
may start a few minutes after the heating equip-
ment turns on (on most systems). When using an 
electric heat thermostat, the fan starts and stops 
with the heating equipment. In cooling, the fan 
starts and stops with the cooling equipment.

Be sure all equipment responds correctly to the 
thermostat.