Volvo 850. Manual — part 66

Fig. 17: Identifying Evaporator & Heater Core Connections

Courtesy of Volvo Cars of North America.

COMPRESSOR

Removal & Installation

1) Disconnect negative battery cable. Discharge A/C system,

using approved refrigerant recovery/recycling equipment. Remove air

intake hose and hose connection to fan cover. Remove control box air

intake hoses and Electronic Control Units (ECUs) from control box.

2) Remove control box air intake hoses and disconnect inlet

hose connection from fan cover. Remove fan cover. Disconnect relays

and cables from fan cover (2 tie straps).

3) Remove 4 screws and fan cover. Remove relay shelf and

spacers. Disconnect 2-pin connector from fan relay and connector from

fan motor. Remove fan cover. See Fig. 18.

4) Shield radiator. Disconnect harness connectors from

compressor. Disconnect snap-on connectors on receiver-drier. Remove

right side headlight casing. Remove receiver-drier bracket screw.

5) Remove air guide. With bracket hooked onto side member,

lift receiver/drier out. Plug receiver-drier pipe ends. Disconnect

drive belt.

6) Disconnect compressor connector and temperature sensor.

Remove compressor. To install, reverse removal procedure. Lubricate

NEW "O" rings with compressor oil.

Fig. 18: Removing Cooling Fan Components

Courtesy of Volvo Cars of North America.

CONDENSER

NOTE: When replacing condenser, always replace "O" rings and

snap-on connections.

Removal & Installation

1) Disconnect negative battery cable. Discharge A/C system,

using approved refrigerant recovery/recycling equipment. Disconnect

air intake hose. Remove hose connector to fan cover.

2) Remove Electronic Control Units (ECUs) from control unit

box. Disconnect control unit box air intake hoses. Remove inlet hose

connector to fan cover. Disconnect relays from relay casing. Remove 4

screws to disconnect fan cover, and fold cover back towards engine.

Remove relay shelf and spacers. See Fig. 18.

3) Disconnect pipes from condenser. Disconnect high-pressure

sensor connector. Remove high pressure sensor. Disconnect condenser

screws. Lift condenser out.

4) To install, reverse removal procedure. Transfer high-

pressure sensor and rubber gasket to NEW condenser. Lubricate NEW "O"

rings with compressor oil.

DAMPER MOTOR

Removal & Installation

Turn ignition off. Remove soundproofing from center console.

Remove glove compartment. Disconnect connector from damper motor

(located on A/C control unit). Hold catches in on both sides of damper

motor and pull motor straight out. See Fig. 19. To install, reverse

removal procedure.

Fig. 19: Removing Damper Motor

Courtesy of Volvo Cars of North America.

DASHBOARD

NOTE: Dashboard consists of 5 main sections: upper frame, lower

frame (left and right), defroster duct and dashboard cover.

Except for dashboard cover, all the main sections are glued

together and cannot be separated.

Removal & Installation

1) Disconnect negative battery cable. Disable air bag system.

See AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY

EQUIPMENT section. From engine compartment, remove windshield wiper

nuts, windshield wiper well cover panel screws and wiper well. Remove

wiper motor mountings.

2) From passenger compartment, remove air bag module. Mark

steering wheel position relative to steering wheel shaft. Remove

steering wheel nuts and steering wheel. Remove steering wheel stalks.

3) Remove steering wheel stalk connector. Remove left and

right side sound proofing, side defroster, left and right side speaker

covers, and speakers.

4) Remove dashboard mounting screws and glove box. Remove

radio. Reach underneath ECC control module, and push up on locking

button to release ECC control module. Remove ECC control module from

dashboard. Remove cigarette lighter connector. Lift off dashboard. To

install, reverse removal procedure.

DASHBOARD COVER

NOTE: When adjusting air-mix damper, only the dashboard cover

needs to be removed.

Removal & Installation

1) Remove side defroster cover plate screws. Remove dash

panel vents by rolling vents down and pulling out. Both vents and air

duct on right side must be removed.

2) Remove left and right side speakers. Remove dashboard

cover screws and lift off dashboard cover. To install, reverse removal

procedure. Ensure hook on right side of dashboard cover plate engages

into upper frame section.

DUCT TEMPERATURE SENSOR

Removal & Installation

1) Turn ignition off. Remove radio. Reach under ECC control

module, push up on locking button, and release ECC control module.

Remove ECC control module from dashboard.

2) Remove left and right side sound insulation from center

console. Remove glove box. Remove duct temperature sensor connector

and pull down on duct temperature sensor. To install, reverse removal

procedure.

EVAPORATOR

Removal & Installation

Disconnect negative battery cable. Remove dashboard assembly.

See DASHBOARD. Remove climate control unit. See CLIMATE CONTROL UNIT.

Remove evaporator cover screws and clips. Lift out evaporator. See

Fig. 20. To install, reverse removal procedure.

Fig. 20: Removing Evaporator

Courtesy of Volvo Cars of North America.

HEATER CORE