Chrysler RG Voyager. Manual — part 1233

A/C system is located within the rear HVAC housing,
behind the right quarter trim panel. The rear A/C
evaporator is positioned in the rear HVAC housing so
that all air entering the housing must pass over the
evaporator fins before it is distributed through the
rear heating-A/C system ducts and outlets. However,
air passing over the evaporator fins will only be con-
ditioned when the A/C compressor is engaged and cir-
culating refrigerant through the rear A/C evaporator.

The rear A/C evaporator tubes are connected and

sealed to the rear A/C expansion valve by use of rub-
ber O-rings and a tapping block.

The rear A/C evaporator can only be serviced by

removing and disassembling the rear HVAC housing.

OPERATION

Refrigerant enters the rear A/C evaporator from

the rear A/C expansion valve as a low-temperature,
low-pressure mixture of liquid and gas. As air flows
over the fins of the rear A/C evaporator, the humidity
in the air condenses on the fins, and the heat from
the air is absorbed by the refrigerant. Heat absorp-
tion causes the refrigerant to boil and vaporize. The

refrigerant becomes a low-pressure gas when it
leaves the rear A/C evaporator.

The rear A/C evaporator cannot be repaired and, if

faulty or damaged, it must be replaced.

Fig. 1 Rear A/C Evaporator

1 - REAR A/C EVAPORATOR

PLUMBING - REAR

24 - 99

REMOVAL

REAR A/C EVAPORATOR

WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - FRONT - WARNINGS)
and (Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - FRONT - CAUTIONS). Failure to follow
the warnings and cautions could result in possible
personal injury or death.

(1) Remove the rear HVAC housing from the vehi-

cle (Refer to 24 - HEATING & AIR CONDITIONING/
DISTRIBUTION

REAR/HVAC

HOUSING

REMOVAL).

(2) Remove the rear evaporator line extension from

the rear A/C expansion valve (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING - REAR/
A/C

EVAPORATOR

LINE

EXTENSION - REMOVAL).

(3) Remove the rear A/C expansion valve from the

rear A/C evaporator (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - REAR/A/C EXPAN-
SION VALVE - REMOVAL).

(4) Remove the rubber grommet that seals the

evaporator inlet and outlet tubes to the rear HVAC
housing near the rear A/C expansion valve.

(5) Remove the three screws that secure the upper

half of the rear HVAC housing to the lower half (Fig.
2).

(6) Remove the three metal spring clips that

secure the upper half of the rear HVAC housing to
the lower half.

(7) Carefully separate and remove the upper half

of the rear HVAC housing from the lower half.

(8) Remove the rear A/C evaporator from the lower

half of the rear HVAC housing.

REAR EVAPORATOR LINE EXTENSION

(1) Remove the rear HVAC housing (Refer to 24 -

HEATING & AIR CONDITIONING/DISTRIBUTION
- REAR/HVAC HOUSING - REMOVAL).

(2) Remove the screw that secures the flange to

the rear HVAC housing and remove the flange (Fig.
3).

(3) Carefully remove the foam insulating from the

bottom of the rear A/C expansion valve to gain access
to the evaporator line extension sealing plate (Fig. 4).

(4) Remove the two screws that secure the expan-

sion valve bracket to the lower rear HVAC housing.

(5) Remove the nut that secures the expansion

valve bracket to the expansion valve stud and
remove the bracket

(6) Remove the nut that secures the evaporator

line extension seal plate to the expansion valve stud
and remove the seal plate.

(7) Remove the evaporator line extension from the

rear A/C expansion valve and the lower rear HVAC
housing.

Fig. 2 Rear A/C Evaporator

1 - UPPER REAR HVAC HOUSING
2 - REAR A/C EVAPORATOR
3 - LOWER REAR HVAC HOUSING

Fig. 3 Evaporator Line Extension Plate

1 - LOWER REAR HVAC HOUSING
2 - FLANGE
3 - EVAPORATOR LINE EXTENSION

24 - 100

PLUMBING - REAR

A/C EVAPORATOR (Continued)

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Chrysler RG Voyager. Manual — part 1233

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