Dodge Journey: Description, Operation
DESCRIPTION
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:
Spring(s), valve
Description
The valve springs are made from high strength, chrome-silicon steel. The
springs are common for intake and
exhaust applications. The valve spring seat is integral with the valve stem
...
EMISSIONS INSPECTION AND MAINTENANCE PROGRAMS
In some localities, it may be a
legal requirement to pass
an inspection of this vehicle’s emissions control system.
Failure to pass could prevent vehicle registration.
For states that require a ...
Sensor, infrared temperature
DESCRIPTION
Fig. 37: Infrared Sensor
The infrared temperature sensor is located in the overhead console and
consists of an infrared transducer
concealed behind a clear lens (2) in a molded plas ...