my Ford Mustang S550 (2015-2023) AC suddenly stopped blowing cold air what happened

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is off.
• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Check Refrigerant Levels

• Connect a manifold gauge set to the AC service ports (low and high side).
• Read the pressure levels; if low, proceed to recharge the AC system.
• If the pressure is too high, there may be a blockage or overcharge.

3. Recharge AC System

• If refrigerant is low, use a refrigerant canister with the appropriate R-134a refrigerant.
• Attach the canister to the low-pressure service port.
• With the engine running and AC on high, open the valve on the canister to allow refrigerant into the system until appropriate levels are reached.
• Monitor the gauge to ensure correct pressure.

4. Inspect and Replace AC Compressor (if necessary)

• If the compressor does not engage, inspect the electrical connections and replace the compressor if it is faulty.
• Remove the serpentine belt from the compressor.
• Disconnect the AC lines from the compressor (use a line wrench to avoid damage).
• Remove mounting bolts and take out the old compressor.
• Install the new compressor in reverse order, ensuring proper torque specifications are followed.

5. Test the System

• Reconnect all components and the battery terminal.
• Start the engine and run the AC to check for proper operation and cold air flow.