Evacuating the air conditioning

Precondition

The engine is switched off.

Carry out the service function:
- Body
- Heating and air conditioning functions
- Drain/fill up refrigerant circuit
Remove the sealing caps from the refrigerant filler necks.
Connect the high pressure line of the A/C service station with the vehicle's high-pressure connection (red).
Connect the low-pressure line of the A/C service station with the vehicle's low-pressure connection (blue).

Courtesy of BMW OF NORTH AMERICA, INC.
Start the suction process on the A/C service station.
After working on the refrigerant circuit which lasts up to 24 hours, the suction time of at least 30 min must be maintained.
After working on the refrigerant circuit which lasts longer than 24 hours, the suction time of at least 60 min must be maintained.
During suction process, allow the blower of the heating and air-conditioning unit to run at middle blower speed.
If the vacuum does not remain stable during suction process:

Precondition

The engine is switched off.

Remove the sealing caps from the refrigerant filler necks.
Connect the high pressure line of the A/C service station with the vehicle's high-pressure connection (red).
Connect the low-pressure line of the A/C service station with the vehicle's low-pressure connection (blue).
Start the suction process on the A/C service station.
After working on the refrigerant circuit which lasts up to 24 hours, the suction time of at least 30 min must be maintained.

Courtesy of BMW OF NORTH AMERICA, INC.
After working on the refrigerant circuit which lasts longer than 24 hours, the suction time of at least 60 min must be maintained.
During suction process, allow the blower of the heating and air-conditioning unit to run at middle blower speed.
If the vacuum does not remain stable during suction process: