why does my BMW X3 G01 (2018-2024) AC blow warm air

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is turned off.
• Disconnect the battery to avoid any electrical shorts during repairs.

2. Recharge the AC System

• Tools Required: Manifold gauge set, refrigerant can, safety goggles, gloves.
• Check the refrigerant level using the manifold gauge set. If low, proceed to recharge:
  1. Connect the low-pressure side of the manifold gauge to the AC service port.
  2. Start the engine and turn on the AC to the maximum setting.
  3. Add refrigerant slowly until the correct pressure is reached (refer to the service manual for specific pressure values).
  4. Disconnect the manifold gauge and replace the service port cap.

3. Inspect and Replace Components

• If the refrigerant was not low, further inspection is required:
  1. Compressor Check:
     • With the AC on, observe if the compressor clutch engages. If not, check the electrical connections and fuses.
     • If defective, replace the AC compressor.
  2. Condenser Inspection:
     • Inspect the condenser for blockages or damage. Clean or replace as necessary.
  3. Expansion Valve or Orifice Tube:
     • If the system is still not functioning properly, check and replace the expansion valve or orifice tube if clogged or malfunctioning.

4. System Flush

• If debris or contaminants are present:
  1. Use an AC system flush kit to clean the system.
  2. Follow the manufacturer's instructions for flushing and ensure all old refrigerant is purged.

5. Final Checks

• Replace the cabin air filter if clogged, which can impact airflow.
• Ensure all connections and components are secure and leak-free.