my Ford Mustang S650 (2024-Present) AC blows hot air, how to troubleshoot

Solution

1. Preparation

• Tools Required: OBD-II scanner, refrigerant gauge, basic socket set, multimeter, safety glasses, gloves.
• Safety Warnings: Disconnect the battery before working on electrical components. Ensure the engine is cool before servicing the AC system.

2. Recharge Refrigerant (if low)

1. Connect Refrigerant Gauge: Attach the low-pressure side gauge to the service port on the AC system.
2. Check Pressure: If the pressure is below the manufacturer’s recommended level, proceed to recharge.
3. Add Refrigerant: Using the correct refrigerant type for your vehicle, connect the refrigerant canister and add refrigerant until the pressure is within the specified range. Monitor the gauge while adding.

3. Replace AC Compressor (if faulty)

1. Remove Drive Belt: Use a socket to relieve tension and remove the serpentine belt from the AC compressor pulley.
2. Disconnect Electrical Connections: Unplug any electrical connectors from the compressor.
3. Remove AC Lines: Use the appropriate wrench to disconnect the refrigerant lines from the compressor. Be prepared for some refrigerant to escape.
4. Unbolt Compressor: Remove the mounting bolts securing the compressor to the engine block using the socket set.
5. Install New Compressor: Position the new AC compressor and secure it with the mounting bolts to the engine block to the manufacturer’s torque specifications.
6. Reattach AC Lines: Reconnect the refrigerant lines and electrical connectors to the new compressor.

4. Test System Functionality

1. Reinstall Drive Belt: Replace the serpentine belt over the AC compressor pulley.
2. Reconnect Battery: Reconnect the battery terminals and ensure all connections are secure.
3. Start the Engine: Turn on the AC system and monitor for cold air and proper compressor function.