Evacuating the air conditioning
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
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).
- 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:
- Run the ABL for leaks in the refrigerant circuit.
- Rectify leaks in the refrigerant circuit.
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.
- 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:
- Run the ABL for leaks in the refrigerant circuit.
- Rectify leaks in the refrigerant circuit.