Removing
1. Remove the refrigerant from the air conditioning system.
2. Reduce the pressure in the cooling system.
3. Drain the coolant.
4. Remove an arm of the panel of devices.
5. Remove the control unit for the heating and ventilation system (except models 638.094/194/294).
6. Remove the air conditioner control button panel (only on models 638.094/194/294).
7. Remove the heater fan relay.
8. Disconnect the wiring connector from the heater housing M40t45.1, M40u77.1, M40g35.1 and M40k17.1 (connector M40k17.1 is not available on models 638.094/194/294) (see fig. 10.1).
Pic. 10.1. Heater body:
1. Heater body,
2. Air duct,
3, 6. Bolts,
4. Pipelines,
5. Radiator,
7. Nut,
8. Drain pipeline,
9. Disconnect the wiring connectors: B29.1, A14.1, B28.1 and A36.1.
10. Unscrew the bolts 3 fastening pipelines 4 to the radiator 5.
11. Unscrew the bolts 6 fastening pipelines 4 to the heater body 1.
12. Turn off a nut 7 fastening the heater case to an arm on a body.
13. Remove expansion valve.
14. Disconnect the drain pipe 8 from the heater body 1.
15. Remove the heater housing 1
Installation
16. Installation is made in an order, the return to removal.