Setting System Switch
System switching positions control thermostat
operation as follows:
COOL: The thermostat controls the air
conditioning system.
OFF: Both the heating and air conditioning
systems are off.
HEAT: The thermostat controls the heating
system.
FAN SWITCH
10
AM
TU
LEAVE
Cool Off Heat
Auto On
System
Fan
69-0803—1
SYSTEM
SWITCH
M5783