Volkswagen Golf MK7 (2015-2019) AC not blowing cold air, what could be wrong?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is turned off, and the keys are removed from the ignition.
• Disconnect the battery to prevent any electrical shorts.

2. Refill Refrigerant

• Tools Required: Refrigerant charging kit, pressure gauge.
• Connect the pressure gauge to the low-pressure service port.
• Check the refrigerant level; if it is low, proceed to charge the system.
• Use the appropriate type of refrigerant (R-134a for MK7) and follow the manufacturer's guidelines for the correct pressure levels.

3. Replace AC Compressor (if needed)

• Tools Required: Socket set, torque wrench, AC compressor removal tool.
• Remove the drive belt by loosening the tensioner.
• Disconnect the electrical connector from the AC compressor.
• Remove the refrigerant lines from the compressor (ensure the system is evacuated).
• Unbolt the AC compressor from the mounting bracket and remove it.
• Install the new compressor, making sure to torque the bolts to the manufacturer's specifications.
• Reconnect the refrigerant lines and electrical connector.

4. Replace Cabin Air Filter (if necessary)

• Tools Required: None.
• Locate the cabin air filter housing, usually behind the glove compartment.
• Remove the cover and take out the old filter.
• Install the new cabin air filter in the correct orientation.
• Reattach the housing cover.

5. Final System Check

• Tools Required: OBD-II scanner.
• Reconnect the battery.
• Start the vehicle and turn on the AC system.
• Monitor the system pressure using the gauge to ensure it is within the normal range.
• If the system is functioning correctly, ensure that no leaks are present and that the AC blows cold air.