why does my Volkswagen Golf AC blow warm air only

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle's battery before working on the AC system to prevent electrical shock.
• Ensure the car is on a level surface and the engine is off.

2. Check and Recharge Refrigerant

• Tools Required: Refrigerant gauge set, refrigerant (if low), safety goggles, gloves.
• Sub-steps:
  1. Connect the low-pressure side of the refrigerant gauge to the AC system service port.
  2. Read the pressure gauge to determine refrigerant levels.
  3. If the pressure is low, add refrigerant according to the manufacturer's specifications (usually R-134a for older models).
  4. Monitor the system while adding refrigerant to avoid overcharging.

3. Inspect and Replace AC Compressor (if necessary)

• Tools Required: Socket set, torque wrench, AC compressor replacement part, refrigerant recovery machine.
• Sub-steps:
  1. Recover refrigerant using the recovery machine to prevent environmental damage.
  2. Disconnect electrical connectors and hoses from the AC compressor.
  3. Remove the mounting bolts of the compressor using the socket set.
  4. Install the new compressor by reversing the removal steps, ensuring all connections are secure.
  5. Recharge the system with refrigerant as per specifications.

4. Replace Cabin Air Filter (if blocked)

• Tools Required: Screwdriver or socket set (depending on model), new cabin air filter.
• Sub-steps:
  1. Locate the cabin air filter housing, usually found behind the glove compartment.
  2. Remove the housing cover using the screwdriver or socket set.
  3. Take out the old cabin air filter and clean any debris from the housing.
  4. Install the new cabin air filter, ensuring it is oriented correctly.
  5. Reassemble the housing cover.