Heater Assembly
| ITEM | DESCRIPTION |
|---|---|
| 1 | A/C evaporator |
| 2 | Heater coolant pipes |
| 3 | Windshield distribution door motor |
| 4 | RH temperature blend motor |
| 5 | Heater core |
| 6 | LH temperature blend motor |
| 7 | Face and feet distribution door motor |
The heater assembly controls the temperature of the air supplied to the air distribution ducts, as directed by the ATC module. The heater assembly is installed on the vehicle center line, between the instrument panel and the engine bulkhead.
The heater assembly consists of a casing which contains the Air Conditioning (A/C) evaporator, the heater core, 2 air distribution control doors, and 2 temperature blend control doors.
The A/C evaporator is controlled as part of the A/C system. For additional information, refer to: Air Conditioning (Description and Operation).
The heater core provides the heat source to warm the air being supplied to the cabin. The heater core is an aluminium 2 pass, fin and tube heat exchanger, and is installed across the width of the heater housing. Two aluminium tubes attached to the heater core extend through the engine bulkhead and connect to the engine cooling system. When the engine is running, coolant is constantly circulated through the heater core by the coolant pump.
For additional information, refer to: ENGINE COOLING (Description and Operation).