4-21
SECTION 4 –
APPLIANCES AND SYSTEMS
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.
HEAT PUMP
–If Equipped
Your coach may be equipped with an air
source heat pump built into the air conditioning
system. Because the heat pump operates on
electricity, it provides economical heat inside
your coach and helps reduce the use of propane
gas for heating in cooler weather.
A heat pump can be thought of as an air
conditioner running in reverse. An air
conditioner absorbs heat from the air on the
inside of the coach and moves it to the outside.
The heat pump does exactly the opposite. Even
cold air contains some heat, so a heat pump will
extract heat from the outside air on a cold day and
carry it to the inside of the coach to maintain a
comfortable temperature.
The efficiency of a heat pump decreases as the
outdoor air temperature drops, so supplementary
heat is often needed when the outside
temperature nears freezing. This system is set to
automatically start the gas furnace to assist the
heat pump if room temperature cools to 5 degrees
or more below the thermostat set temperature.
You may wish to manually switch to furnace heat
to maintain a higher temperature when outside
X = Switch Position
O = Switch position does not matter or is inactive for this feature
FAN MODE
SWITCH
THERMOSTAT SWITCH
FAN SPEED
SWITCH
WHAT HAPPENS
Auto
On
Cool
Off
Gas * Elect *
Lo
Hi
X
X
O
O
If the Thermostat Switch is Off and the Fan
Switch is on Auto, the whole heating and
cooling system is off - nothing is happening.
X
X
X
A/C Fan runs continuously at Low Speed.
X
X
X
A/C Fan runs continuously at High Speed.
Gas Furnace Heating:
O
O
X
O
O
Furnace Blower runs along with the LP Gas
Furnace, which turns on and off as needed
according to thermostat setting.
Heat Pump Heating: *
X
X
O
O
A/C Fan runs at Low Speed along with the
Heat Pump, which turns on and off as
needed according to thermostat setting.
X
X
O
O
A/C Fan runs continuously at Low Speed
while the Heat Pump turns on and off as
needed according to thermostat setting.
A/C Cooling:
X
X
X
A/C Fan runs at Low Speed along with the
Air Conditioner, which turns on and off as
needed according to thermostat setting.
X
X
X
A/C Fan runs at High Speed along with the
Air Conditioner, which turns on and off as
needed according to thermostat setting.
X
X
X
A/C Fan runs continuously at Low Speed
while the Air Conditioner turns on and off
according to thermostat setting.
X
X
X
A/C Fan runs continuously at High Speed
while the Air Conditioner turns on and off
according to thermostat setting.
* 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.
