64 11 206 Removing and installing/replacing heating and air-conditioning unit: Notes

Necessary preliminary work: 

• Drain off AIR CONDITIONING SYSTEM 
• Remove ACOUSTIC INSULATION FROM BULKHEAD UPPER SECTION
• Remove FAN HOUSING FOR HEATING AND AIR-CONDITIONING UNIT 
• Remove LEFT SUSPENSION CROSSBRACE
• Remove SUPPORT FOR DASHBOARD
• Disconnect plug connections
• Unclip wiring harness mountings from 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 CONTROLS , do not yet disconnect  plug connections
• Ignition ON
• Use the BMW diagnosis system to move the controller drives into the installation position as follows:
  • Body
  • Heating and air conditioning functions
  • Flap motors
  • Installation position of flap motors
• Disconnect all plug connections from the RADIO AND AIR CONDITIONING CONTROLS 
• Ignition off
• Drain off AIR CONDITIONING SYSTEM 
• Remove SOUND INSULATION FOR BULKHEAD UPPER PART
• Remove FAN 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 penetration (1) towards top.

Fig 1: Identifying Feed Out Line Penetration

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Release screws (1) and remove refrigerant lines (2) with associated seal.

Tightening torque 64 53 1AZ .

Installation note: 

Replace sealing rings.

Use special tool 00 9 030 to mount sealing rings without damaging them.

Fig 2: Identifying Refrigerant Lines And Screws

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Release hose clamps (1) with special tool 17 2 050 and detach coolant hoses (2).

Fig 3: Identifying Coolant Hoses And Hose Clamps

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Equipment specification with electric auxiliary heater only: 

Release screw (1).

Remove earthing cable for electric auxiliary heater (2) from floor trim panel (3).

Fig 4: Identifying Electric Auxiliary Heater Earthing Cable, Floor Trim Panel And Screw

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Run excess cable as shown in item (4).

Fig 5: Identifying Earthing Cable Length And Run Excess Cable

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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 engaged.

Fig 6: Identifying Lock Retaining Lug On Gaiter

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Unclip air ducts (2), left and right towards bottom, from heater/air conditioner (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).

Fig 7: Feeding Out Heating And Air-Conditioning Unit In Direction

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