my Toyota Corolla E210 (2019-2024) AC is not blowing cold air what could be wrong?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to avoid any electrical issues during the repair.

2. Recharge the AC System

• Tools Required: Manifold gauge set, refrigerant, safety goggles, gloves.
• Connect the low-pressure side of the manifold gauge to the AC service port.
• Check the pressure readings on the gauge; if low, proceed to recharge.
• Add the appropriate refrigerant (R-134a or R-1234yf as per specifications) slowly until the correct pressure is reached.
• Monitor the system while adding refrigerant to avoid overfilling.

3. Inspect and Replace the AC Compressor (if faulty)

• Tools Required: Wrench set, socket set, torque wrench, refrigerant recovery machine.
• Remove the belt from the AC compressor.
• Disconnect electrical connectors and refrigerant lines from the compressor.
• Remove mounting bolts and carefully take out the compressor.
• Install the new compressor by aligning it properly and securing it with mounting bolts to the specified torque.
• Reconnect the refrigerant lines and electrical connectors.

4. Check and Replace AC Relay/Fuse (if faulty)

• Tools Required: Multimeter, replacement relay/fuse.
• Locate the AC relay and fuse in the fuse box.
• Use a multimeter to check for continuity in the relay and fuse.
• If either component is faulty, replace it with a new one.