Heater Hose: Description and Operation

Rear Heater Core Description:

The rear heater core is a heat exchanger made of rows of tubes and fins. The rear heater core is located in the rear HVAC housing behind the right interior quarter trim panel and is retained in the housing by a plastic mounting bracket and a screw.

The heater core tubes are attached to the heater core by removable metal retaining clips and are secured to the rear floor panel by a plastic bracket and two nuts.

If the rear heater core is found to be leaking or is damaged, it must be replaced.

Engine coolant is circulated through heater hoses and tubes to the heater core at all times. As the coolant flows through the heater core, heat removed from the engine is transferred to the heater core fins and the air directed through the heater core picks up the heat from the fins. The blend air door allows control of the heater output air temperature by controlling how much of the air flowing through the heater-A/C housing is directed through the heater core. The blower motor speed controls the volume of air flowing through the heater-A/C housing. The heater core cannot be repaired and, if faulty or damaged, it must be replaced.