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FURNACE-A/C THERMOSTAT OPERATION CHART
The following chart shows the system functions with the "Heat/Cool" thermostat. Disregard references
to heat functions when using the "Cool Only" thermostat in the rear bedroom.
X = Switch Position
FAN MODE
SWITCH
Auto
On
X
X
X
O
O
X
X
X
X
X
X
* NOTE: These instructions include the optional heat pump, which may not be equipped on your model. If you
do not have a heat pump, the Thermostat Switch Gas position is the same as the Heat position on your
thermostat. In this case, ignore the Electric Heat Switch settings, which apply to the heat pump only.
O = Switch position does not matter or is inactive for this feature
THERMOSTAT SWITCH
Cool
Off
Gas * Elect *
X
X
X
X
X
X
X
X
X
X
APPLIANCES AND SYSTEMS
FAN SPEED
SWITCH
WHAT HAPPENS
Lo
Hi
If the Thermostat Switch is Off and the Fan
O
O
Switch is on Auto, the whole heating and
cooling system is off - nothing is happening.
X
A/C Fan runs continuously at Low Speed.
X
A/C Fan runs continuously at High Speed.
Gas Furnace Heating:
Furnace Blower runs along with the LP Gas
O
O
Furnace, which turns on and off as needed
according to thermostat setting.
Heat Pump Heating: *
A/C Fan runs at Low Speed along with the
O
O
Heat Pump, which turns on and off as
needed according to thermostat setting.
A/C Fan runs continuously at Low Speed
while the Heat Pump turns on and off as
O
O
needed according to thermostat setting.
A/C Cooling:
A/C Fan runs at Low Speed along with the
X
Air Conditioner, which turns on and off as
needed according to thermostat setting.
A/C Fan runs at High Speed along with the
X
Air Conditioner, which turns on and off as
needed according to thermostat setting.
A/C Fan runs continuously at Low Speed
X
while the Air Conditioner turns on and off
according to thermostat setting.
A/C Fan runs continuously at High Speed
while the Air Conditioner turns on and off
X
according to thermostat setting.
SECTION 4 -
4-11
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