Dodge RAM 1500 1998 Owner's Manual page 2522

DR
HVAC HOUSING (Continued)
DISASSEMBLY
(1) Remove the HVAC housing from the vehicle
and place it on the workbench (Refer to 24 - HEAT-
ING & AIR CONDITIONING/DISTRIBUTION/HVAC
HOUSING - REMOVAL).
(2) Disconnect the electrical connectors from the
blower motor, blower motor resistor block, evaporator
temperature sensor and each actuator (Fig. 10).
(3) Remove the HVAC wiring harness from the
HVAC housing.
(4) If necessary, remove the blower motor from
the HVAC housing (Refer to 24 - HEATING & AIR
CONDITIONING/DISTRIBUTION/BLOWER
MOTOR - REMOVAL).
(5) If necessary, remove the blower motor resistor
block from the HVAC housing (Refer to 24 - HEAT-
ING & AIR CONDITIONING/CONTROLS/BLOWER
MOTOR RESISTOR BLOCK - REMOVAL).
(6) Carefully remove the foam seals from the
heater core and evaporator coil tube mounting flange
of the HVAC housing. If the either seal is deformed
or damaged, it must be replaced.
(7) Remove the screws that secure the heater core
in the HVAC housing and carefully remove the
heater core from the housing (Refer to 24 - HEAT-
ING & AIR CONDITIONING/PLUMBING/HEATER
CORE - REMOVAL).
1 - RECIRCULATION HOUSING
2 - RECIRC DOOR ACTUATOR
3 - DRIVER SIDE BLEND DOOR ACTUATOR
4 - FLOOR DISTRIBUTION DUCT
5 - DEFROST DOOR ACTUATOR
6 - PANEL DOOR ACTUATOR
7 - UPPER HVAC HOUSING
8 - PASSENGER SIDE BLEND DOOR ACTUATOR
that help secure the upper and lower HVAC housing
halves together.
lower HVAC housing halves to each other and those
that secure the recirculation housing to the upper
HVAC housing.
and the upper HVAC housing from the lower hous-
ing.
ASSEMBLY
housing. During assembly, be certain of the following:
the upper and lower HVAC housing halves to each
other and those that secure the recirculation housing
to the upper HVAC housing. Tighten the screws to
2.2 N·m (20 in. lbs.).
evaporator coil tubes.
block (Refer to 24 - HEATING & AIR CONDITION-
Fig. 10 HVAC Housing - Disassembled
9 - HEATER CORE
10 - LOWER HVAC HOUSING
11 - HVAC WIRE HARNESS
12 - DRAIN FOAM SEAL
13 - BLOWER MOTOR
14 - EVAPORATOR FOAM SEAL
15 - EVAPORATOR
16 - HEATER CORE FOAM SEAL
(8) Use a screwdriver to pry off the four snap clips
(9) Remove the screws that secure the upper and
(10) Carefully separate the recirculation housing
(1) Position the upper HVAC housing to the lower
(a) That each of the door pivot shaft ends are
properly engaged in there pivot holes.
(b) That the evaporator drain opening is clean
and the drain foam seal is properly installed.
(2) Install the screws and snap clips that secure
(3) Install the foam seals on the heater core and
(4) If removed, install the blower motor resistor
DISTRIBUTION 24 - 35