why does my Ford Mustang S550 (2015-2023) AC blow warm air

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on the electrical components.

2. Inspect and Replace Refrigerant

• Sub-steps:
  1. Connect the manifold gauge set to the low and high-pressure ports on the AC system.
  2. Check the refrigerant levels; if low, proceed to recharge the system.
  3. Use a refrigerant recovery machine if necessary, following local regulations.
  4. Recharge the system with the correct type and amount of refrigerant (e.g., R-134a or R-1234yf).

Tools Required:

• Manifold gauge set
• Refrigerant recovery machine
• Refrigerant (R-134a or R-1234yf)

3. Replace AC Compressor (if faulty)

• Sub-steps:
  1. Remove the drive belt by releasing tension from the tensioner.
  2. Disconnect the electrical connector from the AC compressor.
  3. Remove the AC lines from the compressor, using a line wrench to prevent damage.
  4. Unbolt and remove the old compressor from its mounting bracket.
  5. Install the new compressor and ensure all bolts are tightened to manufacturer specifications (typically 18-22 ft-lbs).
  6. Reconnect the AC lines and electrical connector, and reinstall the drive belt.

Tools Required:

• Socket set
• Line wrench
• Torque wrench

4. Replace Cabin Air Filter

• Sub-steps:
  1. Locate the cabin air filter compartment (usually under the glove box).
  2. Remove the cover or access panel.
  3. Take out the old cabin air filter and inspect it for dirt and blockages.
  4. Install a new cabin air filter following the airflow direction indicated on the filter.

Tools Required:

• Screwdriver (if necessary)