how to fix the AC not blowing cold air in Volkswagen Tiguan First Generation (2007-2018)

Solution

1. Preparation

• Gather necessary tools: manifold gauge set, socket set, OBD-II scanner, and safety glasses.
• Ensure the vehicle is parked on a level surface with the engine off and cool.

2. Check and Replace Fuses

• Locate the fuse box (usually under the dashboard or in the engine compartment).
• Inspect the AC fuse for continuity using a multimeter.
• If blown, replace with a new fuse of the same amperage.

3. Inspect and Repair the AC Compressor

• Remove the drive belt from the AC compressor (use a socket set for tensioner).
• Check the AC compressor clutch for proper engagement when the AC is turned on.
• If the compressor is faulty, replace it:
  1. Disconnect the refrigerant lines (use caution as refrigerant may escape).
  2. Remove mounting bolts and take out the compressor.
  3. Install the new compressor and reconnect refrigerant lines.

4. Recharge the AC System

• Connect the manifold gauge set to the AC service ports.
• Pull a vacuum for at least 30 minutes to remove moisture from the system.
• Recharge the system with the appropriate refrigerant (R-134a) as specified in the owner's manual.

5. Replace the Cabin Air Filter

• Locate the cabin air filter housing (usually behind the glove box).
• Remove the old filter and check for debris.
• Install a new cabin air filter and ensure it is seated properly.