Dodge Journey: Description, Operation

DESCRIPTION

Heating & Air Conditioning
Fig. 238: Evaporator Description

NOTE: LHD model shown. RHD model similar.

The A/C evaporator (1) for the heating-A/C system is mounted in the HVAC housing, which is located behind the instrument panel. The A/C evaporator and its insulator (2) are positioned within the HVAC housing so that all air entering the housing must pass over the evaporator fins before it is distributed through the heating-A/C system ducts and outlets.

A tapping block (3) and O-ring seals (4) are used to connect and seal the A/C evaporator tubes (5) to the A/C expansion valve.

The A/C evaporator can only be serviced by removing and disassembling the HVAC housing assembly.

OPERATION

Refrigerant enters the A/C evaporator from the A/C expansion valve as a low-temperature, low-pressure mixture of liquid and gas. As air flows over the fins of the A/C 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 A/C evaporator.

NOTE: Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line or expansion valve is disconnected. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.

The A/C evaporator has no serviceable parts except for the O-ring seals. The O-ring seals used on the connections are made from a special type of rubber not affected by R-134a refrigerant. The O-ring seals must be replaced whenever the A/C expansion valve is removed from the A/C evaporator.

The A/C evaporator cannot be repaired and must be replaced if leaking or damaged.

    Removal, Installation
    REMOVAL WARNING: Refer to the applicable warnings and cautions for this system before performing the following operation. Failure to follow the warnings and cautions may result in po ...

    See also:

    WINDOWS
    Power Windows The window controls on the driver’s door trim panel control all of the door windows. Power Window Switches There are single window controls on each passenger door trim panel, wh ...

    MAINTENANCE SCHEDULE
    The oil change indicator system will remind you that it is time to take your vehicle in for scheduled maintenance. On Electronic Vehicle Information Center (EVIC) equipped vehicles “Oil Change Re ...

    Installation
    LEFT-HAND DRIVE 1. Clean any debris off the mating surfaces of the HCU and ABM. CAUTION: When installing new O-rings or solenoid valve stem seals, do not use any type of lubricant. ...

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