my Volkswagen Passat B8 (2015-2022) AC is blowing warm air what’s wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on the AC system.
• Allow the engine to cool before starting work.

2. Check Refrigerant Levels

• Attach the manifold gauge set to the low and high-pressure service ports.
• Read the pressure levels; refer to manufacturer specifications for acceptable ranges.
• If low, proceed to recharge the system.

3. Recharge the AC System

• Use the correct type of refrigerant (usually R-134a for this model).
• Connect the refrigerant can to the low-pressure port of the manifold gauge.
• Open the valve to allow refrigerant into the system, keeping an eye on the pressure gauge.
• Once the system is at the correct level, close the valve and disconnect the canister.

4. Inspect and Replace AC Components (if needed)

• If the pressure is low, inspect for leaks in hoses and connections.
• If a leak is found, replace the affected hoses or components (e.g., O-rings, compressor).
• Ensure all connections are secure and replace any faulty parts as necessary.

5. Reconnect and Test

• Reconnect the battery.
• Start the engine and turn on the AC to check for proper cooling.
• Monitor the system for any unusual noises or behaviors.