why does my Toyota RAV4's air conditioning not blow cold air?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on the electrical components.

2. Check and Replace Refrigerant

• Tools Required: Manifold gauge set, refrigerant canister, safety goggles, gloves.
• Sub-steps:
  1. Connect the manifold gauge set to the A/C service ports.
  2. Check the low and high-pressure readings to determine if refrigerant is low.
  3. If low, add the appropriate type of refrigerant as specified in the owner’s manual.
  4. Monitor the pressure readings while filling to avoid overcharging.

3. Inspect and Replace the A/C Compressor

• Tools Required: Socket set, wrench set, A/C compressor removal tool.
• Sub-steps:
  1. Remove the drive belt from the A/C compressor by loosening the tensioner pulley.
  2. Disconnect the electrical connector and refrigerant lines from the compressor.
  3. Remove the mounting bolts securing the compressor to the engine.
  4. Install the new A/C compressor, tightening the bolts to the manufacturer’s specified torque.
  5. Reconnect the refrigerant lines and electrical connector.

4. Check Electrical Components

• Tools Required: Multimeter.
• Sub-steps:
  1. Inspect the A/C relay in the fuse box for continuity using a multimeter.
  2. Replace the relay if it shows no continuity.
  3. Check the wiring harness for any signs of damage or corrosion and repair as necessary.