BMW X3 (F25) Service & Repair Manual: Ac housing/evaporator, switching elements

BMW X3 (F25) Service & Repair Manual / HVAC / Ac housing/evaporator, switching elements

Removing and installing or replacing expansion valve

Special tools required:

  • 00 9 030

WARNING: Danger of injury! Refrigerant circuit is under high pressure! Avoid contact with refrigerant and refrigerant oil.

Read and comply with safety instructions:

  • Handling R 134a tetrafluorethane refrigerant .
  • HANDLING REFRIGERANT FLUID

IMPORTANT: Risk of damage! Restart engine only when A/C system has been correctly filled.

Follow NOTES for opening and replacing parts in refrigerant circuit.

NOTE: If air conditioning system is opened for more than 24 hours:

  • Replace DESICCANT INSERT FOR AIR CONDITIONING.

Necessary preliminary tasks:

  • DRAIN OFF AIR CONDITIONING SYSTEM
  • Remove TENSION STRUT FROM SPRING STRUT DOME ON LEFT

Release screws (1).

Detach refrigerant lines (2) from expansion valve (3).

Installation note:

Replace sealing rings.

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

HVAC

Release screws (1).

Remove expansion valve (2) from retaining clip.

HVAC

Installation note:

Place expansion valve (1) exactly on refrigerant lines (2) and (3).

Fit screws of expansion valve (1) and make sure retaining clip (4) is correctly positioned.

HVAC

After installation:

  • EVACUATE AND FILL AIR CONDITIONING SYSTEM

Removing and installing/renewing evaporator

Necessary preliminary work:

  • Remove HEATER/AIR CONDITIONER

Carefully pull rubber grommet (1) and foam seal (2) over pipes (3) and (4).

NOTE: If necessary, replace rubber grommet (1) and/or foam seal (2).

Release screws (5).

HVAC

Unfasten plug connection (1) and disconnect.

Carefully remove seal (2) and all remnants.

Installation note:

Replace gasket (2).

Turn temperature sensor for cold-air distributor (3) in direction of arrow and detach in upwards direction.

Expose connecting cable (4) of temperature sensor for cold-air distributor (3) towards rear of heater/air conditioner (5).

HVAC

Release screws (1).

Remove upper housing (2) of heater/air conditioner in direction of arrow.

Installation note: Make sure upper housing (2) is correctly seated on heater/air conditioner.

HVAC

Pull evaporator (1) in direction of arrow out of lower housing (2) of heater/air conditioner.

Installation note: Make sure evaporator (1) is correctly seated in lower housing (2) of heater/air conditioner.

HVAC

IMPORTANT: Do not bend radiator fins.

If necessary, clean or straighten radiator fins with slat comb.

Removing and installing/replacing expansion valve (N20, N57)

Special tools required:

  • 00 9 030

WARNING: Danger of injury! Refrigerant circuit is under high pressure! Avoid contact with refrigerant and refrigerant oil.

Read and comply with safety instructions:

  • Handling R 134a tetrafluorethane refrigerant .
  • HANDLING REFRIGERANT FLUID

IMPORTANT: Risk of damage! Restart engine only when A/C system has been correctly filled.

Follow NOTES for opening and replacing parts in refrigerant circuit.

NOTE: If air conditioning system is opened for more than 24 hours:

  • Replace DESICCANT INSERT FOR AIR CONDITIONING.

Necessary preliminary work:

  • DRAIN OFF AIR CONDITIONING SYSTEM
  • Remove acoustic cover

Release screws (1).

Detach refrigerant lines (2) from expansion valve (3).

Installation note:

Replace sealing rings.

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

HVAC

Release screws (1).

Remove expansion valve (2) from retaining clip.

HVAC

Installation note:

Place expansion valve (1) exactly on refrigerant lines (2) and (3).

Fit screws of expansion valve (1) and make sure retaining clip (4) is correctly positioned.

HVAC

After installation:

  • EVACUATE AND FILL AIR CONDITIONING SYSTEM

Removing and installing/replacing expansion valve (N55, N47)

Special tools required:

  • 00 9 030

WARNING: Danger of injury! Refrigerant circuit is under high pressure! Avoid contact with refrigerant and refrigerant oil.

Read and comply with safety instructions:

  • Handling R 134a tetrafluorethane refrigerant .
  • HANDLING REFRIGERANT FLUID

IMPORTANT: Risk of damage! Restart engine only when A/C system has been correctly filled.

Follow NOTES for opening and replacing parts in refrigerant circuit.

NOTE: If air conditioning system is opened for more than 24 hours:

  • Replace DESICCANT INSERT FOR AIR CONDITIONING.

Necessary preliminary tasks:

  • DRAIN OFF AIR CONDITIONING SYSTEM
  • Remove intake silencer housing .

Release screws (1).

Detach refrigerant lines (2) from expansion valve (3).

Installation note:

Replace sealing rings.

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

HVAC

Release screws (1).

Remove expansion valve (2) from retaining clip.

HVAC

Installation note:

Place expansion valve (1) exactly on refrigerant lines (2) and (3).

Fit screws of expansion valve (1) and make sure retaining clip (4) is correctly positioned.

HVAC

After installation:

  • EVACUATE AND FILL AIR CONDITIONING SYSTEM
Air conditioning, leak detection
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Compressor
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