64 11 206 Removing and installing/replacing heating and air-conditioning unit
Special tools required:
Refrigerant circuit is under high pressure!
Avoid contact with refrigerant and refrigerant oil.
Read and comply with safety information:
- Handling refrigerant R134a (tetrafluorethane). See NOTE FOR HANDLING R134A REFRIGERANT or SAFETY INFORMATIONS FOR HANDLING TETRAFLUORETHANE REFRIGERANT R134A
- HANDLING REFRIGERANT OIL
Attention!
Risk of damage!
Restart engine only when air conditioning has been correctly filled.
Follow NOTES for opening and replacing parts in refrigerant circuit.
If Air conditioning is opened for more than 24 h: Replace DESICCANT INSERT FOR AIR CONDITIONING SYSTEM .
Required preliminary work for the removal and installation of the heating and air-conditioning unit:
- Drain off AIR CONDITIONING SYSTEM
- Remove BULKHEAD UPPER PART SOUND INSULATION
- Remove blower housing for heating and air-conditioning unit
- Remove LEFT SUSPENSION CROSS-BRACE
- Remove SUPPORT FOR DASHBOARD
- Disconnect plug connections
- Unclip the wiring harness mountings from the heating and air-conditioning unit
Required preliminary work for the replacement of the heating and air-conditioning unit and the subsequent modification of the controller drives:
- Remove RADIO AND AIR CONDITIONING CONTROL PANEL , do not yet disconnect plug connections
- Ignition ON
- Use the BMW diagnosis system to move the controller drives into the installation position as follows:
- Service functions
- Body
- Heating and air conditioning functions
- Flap motors
- Installation position of flap motors
- Disconnect all PLUG CONNECTIONS FROM THE RADIO AND AIR CONDITIONING CONTROL PANEL
- Ignition off
- Disconnect NEGATIVE BATTERY LEAD
- Drain off AIR CONDITIONING SYSTEM
- Remove BULKHEAD UPPER PART SOUND INSULATION
- Remove blower housing for heating and air-conditioning unit
- Remove LEFT SUSPENSION CROSS-BRACE
- Remove SUPPORT FOR DASHBOARD
- Disconnect plug connections
- Unclip the wiring harness mountings from the heating and air-conditioning unit
Recycling
Coolant emerges when coolant lines are detached. Have a suitable collecting vessel ready.
Catch and dispose of escaping coolant.
Observe country-specific waste disposal regulations.
Feed out line feed-through (1) towards top.
Release screws (1) and remove refrigerant lines (2) with associated gasket.
Tightening torque 64 53 1AZ .
Installation note:
Replace sealing rings.
Use special tool 00 9 030 to mount sealing rings without damaging them.
Attention!
Connections must not be mixed up!
Mark connection sequence of water hoses prior to removal.
Release hose clamps (1) with special tool 17 2 050 and detach coolant hoses (2).
Attention!
Carefully blow out coolant connections on heat exchanger for heating system to remove remaining coolant.
Seal openings or lines on heat exchanger for heating system with special tool 32 1 270 to avoid escape of media and contamination.
Equipment specification with electric auxiliary heater only:
Release screw (1).
Remove grounding cable for electric auxiliary heater (2) from floor trim panel (3).
Run excess cable as shown in item (4).
Unlock retaining lug (1) on gaiter (2).
Lever gaiter (2) out of guides.
Installation note:
Make sure retaining lug (1) and adjacent guides are correctly latched.
Unclip left and right air ducts (2) downwards from heating and air-conditioning unit (1).
Feed out heating and air-conditioning unit (1) in direction of arrow.
Installation note:
Water drain (3) must be inserted on both sides into outlet channel (4).
Attention!
In the event of incorrect installation, there is a risk of leakage in the vehicle interior!
Replacement:
- Remount EVAPORATOR
- Remount HEAT EXCHANGER FOR HEATING SYSTEM
- Remount EXPANSION VALVE
- Remount ALL CONTROLLER DRIVES
- If necessary, remount ionizer
- If necessary, remount ELECTRIC AUXILIARY HEATER (FRONT)
After installation:
- Evacuate and fill AIR CONDITIONING
- Bleed and fill COOLING SYSTEM
ATTENTION!
Filling and bleeding must not be performed in ECO-PRO MODE!