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Home >> Volvo >> 1994 >> 850 L5-2.4L VIN 55 B5254S >> Repair and Diagnosis >> Heating and Air Conditioning >> Service and Repair >> Climate Control Assembly. Replacing
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Climate Control Assembly. Replacing



Climate control assembly, replacing

Special tools
999 5385
999 5472

Warning! Follow the safety instructions for work on air conditioning systems.

Preparations
- Disconnect battery negative cable

Removal
- Remove dashboard. Complete Dash Board Removal

Applies to cars with air conditioning (A/C)

- Drain refrigerant from system (see "Drainage of A/C System"). Draining Air Conditioning (A/C) System






- To adapt a new climate control system to an old control module or adapt a new EEC cable for an old ECC control module and climate control system, the wiring at connector 24/11 must be modified
- To replace with a new version, (see Wiring for new climate control unit/ECC control module, replacement :Complete climate unit only) and (Wiring for new climate control unit/ECC control module, replacement :Control module and complete climate unit).
- Open the quick-release connectors on the pipes for the evaporator. Use quick-release connector puller 5385, 5472. 999 5385 999 5472
- Plug the pipes
- Remove the cover plate and the rubber seal on the lead-in in the firewall (1 nut).

For all cars:
- Install hose clips on the hoses for the heat exchanger
- Release the quick-release connectors on the hoses by compressing the catch while pulling the hose outwards
- Plug the pipes for the heat exchanger
- Remove the cover plate and the rubber seal for the lead-in in the firewall (2 screws).

Disconnect the following wiring/connectors:





- The connector for the fan motor
- The connector for the motor for the recirculation shutter
- The connector for the blower fan resistor
- Pull out the cable duct on the fan motor
- The connectors on the brackets.
- Remove the fan relay and the relay base from the relay base
- Remove the relay base.
- Disconnect the connector for the control lighting

Note! The control box (2 screws) must be opened to disconnect the connector. Assemble the control box.

Remove the tunnel console (D9):






- First remove the ashtray (2 screws) and the cigarette lighter compartment (2 screws)
- Then remove the 4 screws holding the center console
- Move the gear selector lever to neutral. Apply the parking brake
- Remove the cover plate from the parking brake hole
- Remove the center console by lifting it and moving it forwards slightly.






- Remove the support plates for the floor carpet
- Remove the connection for the rear floor ducts (1 screw)
- Remove the amplifier bracket
- First remove the amplifier if applicable
- Remove the drain hose.






- Disconnect the cable for the right-hand temperature shutter (MCC)
- Cars with cruise control: Disconnect the vacuum regulator for the cruise control from the climate control system (1 screw)
- Remove the 4 screws for the climate control system
- Lift out the climate control system.


Installation
- The climate control system (4 screws)
- The vacuum regulator for cruise control
- The cable for the right-hand temperature shutter (MCC). The casing for the cable must be 15 mm from the mating surface for the clip
- Drain hose
- The bracket for the climate control system
- The connection to the rear floor ducts (1 screw)
- The support plates for the floor carpet
- Center console
- Fan relay, base and relay base
- The connector for the control panel lighting
- The other connectors and the cable duct for the blower fan motor. Do not forget the tiestrap
- The dashboard according to R1. See Dashboard, replacement:Installation
- The cover plate and the rubber seal on the pipe grommet for the heat exchanger (2 screws)
- Connect the hoses for the heat exchanger.
- Top up the coolant as required.

Applies to cars with air conditioning (A/C):
- The cover plate and the rubber seal for the pipe lead-in for the evaporator (1 nut)
- Connect the pipes.
- Fill the system with refrigerant. Test for leaks (see the chapter on Draining/Recycling refrigerant)













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