how to fix the air conditioning not blowing cold air in my Toyota RAV4?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Tools Required: A/C manifold gauge set, refrigerant (R134a), socket set, safety goggles, gloves.

2. Inspect and Repair Leaks

• Sub-steps:
  1. Visually inspect all A/C lines, connections, and the condenser for signs of refrigerant leaks (oily residue).
  2. If leaks are found, replace the damaged parts (hoses, seals, or condenser).
  3. Use a leak detection dye if necessary to pinpoint hidden leaks.

3. Recharge the A/C System

• Sub-steps:
  1. Connect the A/C manifold gauge set to the low and high-pressure service ports.
  2. Start the engine and turn the A/C on to the maximum setting.
  3. Check the low and high-pressure readings; if low, proceed to add refrigerant.
  4. Slowly add refrigerant until the proper pressure is reached according to the specifications for the RAV4 model year.
  5. Monitor the gauges to ensure the system does not overcharge.

4. Test and Replace Components

• Sub-steps:
  1. If the compressor is not engaging, check the fuse related to the A/C system and replace if blown.
  2. Test the A/C compressor clutch for continuity using a multimeter; replace the compressor if defective.
  3. Inspect the A/C relay and replace if it is faulty.