Heating/ventilation control unit
Removing
1. Disconnect the ground wire from the battery (see «Disconnecting the battery»).
2. To access the control box, remove the corresponding panels in the center of the front panel as described in chapter 11.
3. Remove the two top screws on each corner of the control box
4. Using a small screwdriver, release the lock at the bottom center of the control box and remove the box from the front panel (pic. 10.4).
Pic. 10.4. Release the latch at the bottom center of the heating/ventilation control unit and remove the unit from the front panel
5. Pivot the control box up as far as space allows, then release the clamps and disconnect the control cables from the box. Mark the location of the cables to ensure correct installation (pic. 10.5).
Pic. 10.5. Rotate the control box up and then release the clamps (marked with arrows) and disconnect control cables
6. Disconnect the electrical connector on the back of the control box, and then remove the box.
Installation
7. Installation is carried out in the reverse order of removal. Connect the control cables properly according to their original position.
Heating/ventilation control cables
Removing
8. When removing the control box, disconnect the cables from the heating/ventilation control box as described earlier in this paragraph.
9. Working through a hole in the front panel or from under the front panel (depending on which cable is to be removed, it may be necessary to remove some sections of the front panel to gain access (see chapter 11), release the clips and disconnect the cable from the heater assembly. Mark the cable routing to ensure proper installation.
Installation
10. Installation is carried out in the reverse order of removal. Route the cables correctly and fix them securely.
Heater radiator
Note. When installing, use new O-rings for the heater hose fitting.
Note. The design and layout of the heater varies greatly depending on the model, engine type and year of manufacture. The following procedure refers to a typical case.
Removing
11. Drain the coolant from the cooling system (see chapter 1A or 1B).
12. Remove the bezel assembly as described in chapter 11.
13. Working in the engine compartment, disconnect the heater hoses from the heater pipes. If the hoses are connected separately, release the clamps and disconnect the hoses from the fittings of the heater radiator pipes on the bulkhead of the engine compartment. If the hoses are connected to a block connector, remove the metal clip from the top of the connector and then release the plastic clip by pressing it in the direction of the left hose connection. Pull the fitting out of the heater core. Remove the o-rings from the connector and discard them; when installing, use new (pic. 10.13, a-d).
Pic. 10.13 a. If the heater hoses are connected separately, remove the clamp and disconnect the hoses from the heater radiator pipe fittings
Pic. 10.13, b. If the hoses are connected to the block connector, remove the metal clip from the heater core connector...
Pic. 10.13, c....and then release the plastic clip...
Pic. 10.13, g.... and separate the connector from the partition; remove the o-rings (marked with arrows)
14. Turn out two screws of fastening of a cover above a sealing plug in a partition for pipelines of a radiator of a heater. Remove the cover, paying attention to the D-shaped cutout.
15. Remove the rubber sealing sleeve for fixing in the bulkhead from the heater radiator pipelines.
16. Working inside the vehicle, disconnect and remove the air vents on the driver's and passenger's sides.
17. Turn out a bolt of fastening of the basis of a heater to an arm on a floor (pic. 10.17).
Pic. 10.17. Remove the bolt securing the bottom of the heater to the bracket on the floor
18. Make sure that all cables, wires and related elements are disconnected or moved to the side so that the heater can be moved into the vehicle interior.
19. Again working in the engine compartment, unscrew the two nuts securing the heater assembly to the bulkhead.
20. Call an assistant and, working from the side of the engine compartment, release the heater radiator pipes from the bulkhead and pull the heater assembly into the vehicle interior.
21. With the heater assembly removed, release the four clips, and then remove the heater core from the heater housing (pic. 10.21).
Pic. 10.21. Release the four clamps (marked with arrows), and then remove the heater core from the heater housing
Installation
22. Installation is carried out in the reverse order of removal, taking into account the following points:
- A) Before installing the heater assembly, lubricate the heater piping grommet, and then install it on the heater piping.
- b) Move the heater assembly to its normal position and at the same time insert the sealing sleeve of the heater pipelines into the partition (and again ask the assistant to help you from the side of the engine compartment).
- V) When connecting the heater hoses to the pipes, install new O-rings on the heater core pipes, and then connect the hose fittings to the pipes.
Heater fan
Removing
23. The electric fan assembly is located in the vehicle on the passenger side.
24. Disconnect the ground wire from the battery (see «Disconnecting the battery» in the application).
25. If necessary, to gain access to the area under the front panel on the passenger side, remove the corresponding sections of the front panel (see chapter 11).
26. Remove the screws securing the motor assembly to the heater assembly and move the motor downwards from its original place (pic. 10.26).
Pic. 10.26. Turn out screws of fastening of the electric motor to a heater and remove the electric motor from a regular place
27. Cut the cable securing the electrical wiring to the engine cover, then pull out the rubber grommet and disconnect the electrical connector.
Installation
28. Installation is carried out in the reverse order of removal.