Durango RT 4WD V8-5.9L VIN Z LDC (2002)
Evaporator Core: Description and Operation
Rear
REAR EVAPORATOR
The rear evaporator coil is located in the rear heater-A/C unit housing, in the right rear quarter panel. The evaporator coil is positioned in the
heater-A/C unit housing so that all air that enters the housing must pass over the fins of the evaporator before it is distributed through the system
outlets. However, air passing over the evaporator coil fins will only be conditioned when the compressor is engaged and circulating refrigerant
through the evaporator coil tubes.
Refrigerant enters the evaporator from the rear expansion valve as a low-temperature, low pressure mixture of liquid and gas. As air flows over the
fins of the evaporator, the humidity in the air condenses on the fins, and the heat from the air is absorbed by the refrigerant. Heat absorption causes
the refrigerant to boil and vaporize. The refrigerant becomes a low-pressure gas when it leaves the evaporator. The rear evaporator coil cannot be
repaired and, if faulty or damaged, the rear evaporator coil must be replaced.
