The heater hoses carry the engine coolant from the engine to the heater core. The heater hoses attach to the following locations:

The 2.4L engine uses the flow control valve (or H valve) in order to assist in the heater warm up. The valve attaches to the heater hoses. The valve is located between the engine and the heater core.

The base heater system consists of the following 5 modes:

The following functional assemblies control the base heater system modes within the heater module:

1. The motor and fan assembly (blower) provides the air flow from the air inlet. The blower regulates the air flow for further processing and distribution.
2. The heater core transfers heat from the engine coolant to the inlet air. This transfer heats the inlet air.
3. The temperature valve regulates the amount of air that passes through the heater core. The valve controls following items:

3.1.	The temperature

3.2.	The mix of heated and ambient air.

4. The following valves regulate the flow and distribution of processed air to the distribution ducts:

•	The mode valves

•	The defrost valves

•	The heat valves

The following components control the operation of these assemblies on the control assembly:

1. The knobs
2. The switch

The temperature control knob operates a cable. The mode knob operates a vacuum control in order to select the appropriate mode.