how to fix my Honda Accord AC that’s blowing warm air

Solution

1. Preparation

• Gather tools: refrigerant gauge, manifold gauge set, multimeter, socket set, and safety goggles.
• Ensure the vehicle is parked on a level surface and the engine is turned off.

2. Check Refrigerant Level

• Attach the refrigerant gauge to the low-pressure service port.
• Read the pressure; it should fall within the manufacturer's specified range (typically 30-40 psi for R-134a).
• If low, proceed to recharge the system.

3. Recharge the AC System

• Connect the manifold gauge set to both low and high-pressure ports.
• Start the engine and turn on the AC to the highest setting.
• Add refrigerant until the desired pressure is reached. Monitor the gauge to avoid overcharging.
• Disconnect the gauge set and recap the service ports.

4. Inspect AC Compressor

• Locate the AC compressor and check for any visible signs of wear or leaks.
• Use a multimeter to check if the compressor clutch is receiving power when the AC is turned on.
• If the compressor is faulty, it will need to be replaced.

5. Replace Cabin Air Filter

• Locate the cabin air filter compartment (usually behind the glove box).
• Remove the cover and take out the old filter.
• Insert the new cabin air filter according to the airflow direction indicated on the filter.

6. Test the System

• Start the vehicle and allow the AC to run for a few minutes.
• Check to ensure cool air is now coming from the vents and monitor for any unusual noises.