how to troubleshoot Honda Pilot YF3 (2016-2022) AC not blowing cold air

Solution

1. Preparation

• Gather tools and parts required for repair.
• Disconnect the battery's negative terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Recharge Refrigerant

• Sub-steps:
  1. Connect the manifold gauge set to the low and high-pressure service ports on the AC system.
  2. Check the pressure readings to determine if they are low.
  3. If low, follow the refrigerant manufacturer's instructions to recharge the system with the appropriate refrigerant (R-134a or R-1234yf).
  4. Monitor pressure during the fill process to avoid overcharging.
  5. Disconnect the manifold gauge set and securely cap the service ports.

3. Replace AC Compressor (if faulty)

• Sub-steps:
  1. Remove the drive belt from the AC compressor.
  2. Disconnect the electrical connector from the compressor and the refrigerant lines (ensure the refrigerant is evacuated by a certified technician).
  3. Remove the AC compressor mounting bolts with a socket set.
  4. Install the new AC compressor in reverse order, ensuring all bolts are torqued to manufacturer specifications (typically around 15-20 ft-lbs).
  5. Reconnect the refrigerant lines and electrical connector.

4. Test the AC System

• Sub-steps:
  1. Reconnect the battery's negative terminal.
  2. Start the engine and turn on the AC to the maximum setting.
  3. Monitor the air temperature at the vents using a thermometer.
  4. Inspect for any unusual noises or leaks around the AC components.