Heater Core: Description and Operation

Heater Core Housing
The heater core housing contains the following components:
- heater core
- air temperature control door
- panel airflow control door
- defrost/floor airflow control door

Of these components, only the heater core is serviceable. If any of the airflow control components are not working, a new heater core housing must be installed.







Heater Core
The heater core consists of fins and tubes arranged to extract heat from the engine coolant and transfer the heat to air passing through the heater core housing.