my Porsche 911 992 (2019-Present) AC blows warm air when idling

Solution

1. Preparation

• Tools Required: OBD-II scanner, manifold gauge set, multimeter, basic hand tools.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Recharge the AC System

• Sub-steps:
  1. Connect the manifold gauge set to the AC service ports.
  2. Check the low and high-pressure readings; if low, proceed to recharge the system.
  3. Attach the refrigerant canister to the low-pressure side and open the valve to allow refrigerant into the system until the correct pressure is reached.
  4. Monitor the system while running to ensure no overcharging occurs.

3. Replace AC Compressor (if faulty)

• Sub-steps:
  1. Remove the drive belt from the AC compressor.
  2. Disconnect the electrical connector and refrigerant lines from the compressor.
  3. Unbolt the compressor from its mounting and remove it from the vehicle.
  4. Install the new compressor, ensuring proper alignment and torque specifications (refer to service manual for specific torque values).
  5. Reconnect the refrigerant lines and electrical connector, then reattach the drive belt.

4. Inspect and Replace AC Relay (if necessary)

• Sub-steps:
  1. Locate the AC relay in the fuse box (refer to the owner’s manual for exact location).
  2. Remove the relay and test it with a multimeter for continuity.
  3. If faulty, replace it with a new relay of the same specifications.
  4. Reinsert the relay and test the AC system again.