Skoda Octavia NFL (2020-Present) why is my AC making a loud noise

Solution

1. Preparation

• Tools Required:
  • Socket set
  • Screwdriver set
  • OBD-II scanner
  • Torque wrench
• Ensure the vehicle is parked on a level surface and the engine is turned off. Disconnect the battery for safety.

2. Inspect and Tighten Components

• Sub-steps:
  1. Use a socket set to check all bolts and brackets securing the AC compressor and associated components.
  2. Tighten any loose bolts to the manufacturer’s specified torque values.

3. Replace Worn or Damaged Parts

• Sub-steps:
  1. If the serpentine belt shows signs of cracks or fraying, use a socket wrench to remove the tensioner and take off the old belt.
  2. Install a new serpentine belt according to the routing diagram found on the engine bay.
  3. If the AC compressor is faulty (verified through noise and inspection), disconnect the electrical connector and remove the compressor using a socket set.
  4. Replace it with a new compressor and ensure all connections are tight and leak-free.

4. Clean or Replace Filter/Debris

• Sub-steps:
  1. Remove the cabin air filter located behind the glove box.
  2. Inspect and replace the filter if it is dirty.
  3. Clear any debris from the evaporator and condenser fins to improve airflow.

5. Reconnect Battery and Test

• Sub-steps:
  1. Reconnect the battery terminals.
  2. Start the engine and run the AC at different settings to check for noise reduction and cooling performance.