my Porsche 911 992 AC is blowing warm air what could be wrong

Solution

1. Preparation

• Gather tools and parts needed: OBD-II scanner, manifold gauge set, multimeter, replacement refrigerant, cabin air filter (if necessary).
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to avoid electrical issues while working on the AC system.

2. Check Refrigerant Levels

• Sub-steps:

  1. Connect the manifold gauge set to the high and low-pressure ports of the AC system.
  2. Start the engine and turn the AC to the maximum setting.
  3. Monitor the pressure readings. If pressures are below manufacturer specifications, proceed to recharge the system.

• Tools Required: Manifold gauge set

3. Recharge AC System

• Sub-steps:

  1. If the refrigerant is low, connect a refrigerant can to the low-pressure side of the manifold gauge set.
  2. Open the valve to allow refrigerant to flow into the system until the correct pressure is achieved.
  3. Close the valve and disconnect the refrigerant can.

• Tools Required: Refrigerant can

4. Inspect AC Compressor and Clutch

• Sub-steps:

  1. Locate the AC compressor in the engine bay.
  2. Check for any visible signs of leaks or damage.
  3. Use a multimeter to check the resistance of the compressor clutch. If it is not within specifications, replace the clutch.

• Tools Required: Multimeter

5. Replace Cabin Air Filter (if necessary)

• Sub-steps:

  1. Locate the cabin air filter housing, usually behind the glove box.
  2. Remove the glove box to access the filter compartment.
  3. Remove the old filter and install the new one, ensuring it is oriented correctly.

• Tools Required: Screwdriver