my Volkswagen Golf MK7.5 (2020-Present) AC is blowing warm air what's wrong

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Check and Recharge Refrigerant

• Tools Required: Manifold gauge set, refrigerant canister.
• Connect the manifold gauge set to the AC service ports (high and low).
• Check pressure readings; if low, proceed to recharge.
• Attach the refrigerant canister to the low-pressure service port.
• Open the canister valve slowly and allow refrigerant to enter the system until the correct pressure is achieved as per manufacturer specifications.
• Close the valve and disconnect the manifold gauge set.

3. Inspect and Replace AC Compressor (if necessary)

• Tools Required: Socket set, torque wrench.
• If the AC compressor is not engaging, check the electrical connections and fuses.
• If faulty, remove the AC belt by loosening the tensioner.
• Unbolt the AC compressor from its mounting brackets and disconnect the refrigerant lines (ensure to recover refrigerant if necessary).
• Install the new compressor by reversing the removal steps, ensuring all connections are secure.
• Torque all bolts to manufacturer specifications.

4. Clean or Replace Cabin Air Filter

• Tools Required: None (if filter is accessible).
• Locate the cabin air filter compartment (usually behind the glove box).
• Remove the old filter and clean the housing if necessary.
• Install a new cabin air filter, ensuring it is oriented correctly.