Heater Core
The heater core (9)
transfers the heat from the engine coolant to the incoming air. The heater
core is located in the lower part of the HVAC module near the front
of the dash.
The switch on the control assembly may control the four blower speeds
in all functional modes.
Ducts in the outboard corners of the instrument panel provide side window
defogging. Maximum air flow from these vents is in the heater mode. Air flow
from these vents reduces in the defrost mode.
In all five heater system modes, the blower drives outside air to the
temperature valve (3). The operator controls the position of the temperature
valve. Depending upon the position of the temperature valve, the valve
distributes all or some of the inlet air through the heater core. The
following actions occur:
- The heater core heats the air.
- The air is mixed with cool air as needed.
- The air is directed to one of the following outlets, depending
upon the position of the defrost and heat valves:
| • | The air distribution duct (14) |
- A small amount of air goes to the side window defogging system.
Operating Tips
| • | Clear snow and ice from the hood and air inlet in front of the
windshield. Clearing snow and ice helps in the following manner: |
| - | The heater and defroster work better. |
| - | The chance of fogging the inside of the windshield reduces. |
| • | Run the fan on HI for a few moments before driving. Running the
fan helps in the following manner: |
| - | The intake ducts are clear of snow and moisture |
| - | The chance of fogging the inside of the windows is reduced. |
| • | Keep the front inlet grilles clear of the following obstructions: |
| • | Keep the underseat air path clear of objects. |
