A water-to-air heat exchanger that provides heat to the passenger compartment airstream. Hot coolant from the engine circulates through the tubes in the heater core.

Cooling System Repair

A system that cools and dehumidifies air entering the passenger compartment. The system uses a refrigerant to cool the air and carry heat away from the passenger compartment. Major system components include a compressor, condenser, evaporator, accumulator or receiver/dryer, and orifice tube or expansion valve. Do not intermix different types of refrigerants in an A/C system. Use the type specified by the vehicle manufacturer (R-12 for most 1994 & older vehicles, or R-134a for most 1995 and newer vehicles).

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