The heater system delivers warm air to the passenger compartment
after the engine reaches the normal operating temperature. Outside air and
the air from the passenger compartment pass through the heater core. The hot
engine coolant heats this air. The heated air travels to the passenger compartment
via the ducts and via the outlets.
The heater control unit allows the operator to operate the heater and
the ventilation system. The heater control unit has 4 levers that control
the following settings:
| • | The fresh position or the recirculation position |
The temperature lever controls the temperature of the air that is delivered
to the passenger compartment. This lever opens and closes the air mix door
that controls the amount of air which passes through and around the heater
core.
The mode lever allows the driver to select the following air outlets:
| • | The heat and defrost mode |
The blower speed lever controls a 4-speed blower motor and a fan. The
blower speed lever allows the driver to regulate the amount of air, cold or
warm, that is delivered to the passenger compartment.
The fresh/recirc lever controls the air inlet of the blower. In the
recirculate mode, the blower takes the inside air, circulates the air through
the heater system, and delivers the air into the passenger compartment. The
recirculate mode heats the passenger compartment faster. However, during the
normal heater operation, use the fresh mode in order to prevent window fogging.
In the fresh mode, the blower circulates outside air through the heater system,
and delivers the air into the passenger compartment.
