my Porsche 911 992 (2019-Present) AC is blowing warm air, how do I troubleshoot

Solution

1. Preparation

• Gather tools: OBD-II scanner, manifold gauge set, thermometer, basic hand tools, and a vacuum pump.
• Ensure the vehicle is parked on a level surface and the engine is off before starting work.

2. Inspect and Repair Leaks

• Sub-steps:
  • Visually inspect all hoses and connections for signs of refrigerant leaks (oily residue).
  • If leaks are detected, replace the damaged hoses or seals.
  • Use a leak detector or UV dye to confirm any suspected leaks.

3. Recharge the AC System

• Sub-steps:
  • Connect the manifold gauge set to the AC service ports.
  • If refrigerant is low, extract any remaining refrigerant with the vacuum pump.
  • Recharge the system with the appropriate type and amount of refrigerant, typically R-134a or R-1234yf, as specified in the owner’s manual.
  • Monitor the low and high-pressure readings to ensure they are within the manufacturer's specifications.

4. Check and Replace the Cabin Air Filter

• Sub-steps:
  • Locate and access the cabin air filter compartment, usually behind the glove box.
  • Remove the old filter and inspect for dirt and obstructions.
  • Replace with a new cabin air filter as per manufacturer specifications.

5. Test the AC System

• Sub-steps:
  • Start the vehicle and turn on the AC system to the maximum setting.
  • Use a thermometer to measure the temperature at the center vent; it should be around 40°F (4°C) or lower.
  • Listen for any abnormal noises from the compressor during operation.