how to fix BMW 3 Series F30/F31 (2012-2019) AC not blowing cold air

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Ensure the vehicle is parked on a level surface.

2. Recover and Recharge Refrigerant

• Tools Required: Manifold gauge set, refrigerant recovery machine
• Connect the manifold gauge set to the AC service ports.
• Recover the existing refrigerant from the system using a recovery machine.
• Evacuate the system for at least 30 minutes to remove moisture.
• Recharge the system with the correct amount of refrigerant (refer to the owner’s manual for specifications).

3. Inspect and Replace AC Compressor

• Tools Required: Socket set, torque wrench
• Remove the drive belt from the AC compressor.
• Disconnect electrical connectors and refrigerant lines from the compressor.
• Unbolt the compressor from its mounting bracket and remove it.
• Install the new compressor by reversing the removal steps, ensuring all bolts are torqued to manufacturer specifications.

4. Check and Replace AC Condenser (if necessary)

• Tools Required: Socket set, pliers
• Remove the front grille and any components obstructing access to the condenser.
• Disconnect the refrigerant lines and electrical connectors from the condenser.
• Unbolt and remove the condenser from the vehicle.
• Install the new condenser, reconnect all lines and connectors, and reassemble any removed components.

5. Test the System

• Reconnect the negative battery terminal.
• Start the engine and activate the AC system.
• Monitor for proper compressor engagement and cooling performance.