how to fix the Honda Pilot YF4 (2023-Present) AC blowing warm air

Solution

1. Preparation

• Gather tools: manifold gauge set, multimeter, basic socket set, and safety glasses.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical hazards.

2. Check Refrigerant Levels

• Connect the manifold gauge set to the low-pressure and high-pressure ports of the AC system.
• Start the engine and turn on the AC to the maximum setting.
• Read the pressure gauges; if low, proceed to recharge the system.

3. Recharge the AC System

• Use the correct type of refrigerant (R-134a or R-1234yf as specified in the owner’s manual).
• Attach the refrigerant can to the low-pressure side and open the valve slowly.
• Monitor the pressure on the gauges; refill until reaching the manufacturer’s specified pressure.
• Close the valve on the refrigerant can and disconnect the manifold gauge set.

4. Inspect the AC Compressor

• Locate the AC compressor and visually inspect for any signs of damage or leaks.
• Use a multimeter to check if the compressor clutch is receiving power when the AC is turned on.
• If the clutch does not engage, replace the compressor or repair any electrical issues.

5. Check AC Fuses and Relays

• Locate the fuse box and check the AC fuses using a test light.
• Replace any blown fuses with the correct amperage fuses.
• Test the AC relay with a multimeter; replace it if defective.

6. Verify and Reassemble

• Reconnect the battery and start the vehicle.
• Turn on the AC and check for cold air from the vents.
• Ensure all components are secure and reinstalled properly.