Heater Hoses
The heater hoses carry the engine coolant from the engine to the heater
core. The heater hoses attach to the following locations:
| • | The heater core at the front of the dash |
| • | The inlet pipes at the engine |
| • | The outlet pipes at the engine |
Heater Control Assembly
The base heater system consists of the following 5 modes:
The following functional assemblies control the base heater system modes
within the heater module:
| • | 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. |
| • | The heater core transfers heat from the engine coolant to the
inlet air. This transfer heats the inlet air. |
| • | The temperature valve regulates the amount of air that passes
through the heater core. The valve controls following items: |
| - | The mix of heated and ambient air. |
| • | The following valves regulate the flow and distribution of processed
air to the distribution ducts: |
The following components control the operation of these assemblies on
the control assembly:
The temperature knob operates an electrical actuator that opens and
closes the temperature valve. The mode lever operates a vacuum control in
order to select the appropriate mode.
