my Skoda Octavia NFL (2020-Present) has a musty smell coming from AC

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent any electrical issues.

2. Replace Cabin Air Filter

1. Locate the cabin air filter housing, usually behind the glove compartment.
2. Remove the glove compartment by unscrewing the fasteners and gently detaching it.
3. Take out the old cabin air filter. Check for dirt and mold.
4. Insert a new cabin air filter, ensuring it is oriented correctly according to airflow direction.
5. Reassemble the glove compartment.

3. Clean AC Evaporator

1. Access the AC evaporator by removing any necessary panels from the dashboard.
2. Use a specialized HVAC cleaner or a mixture of water and vinegar in a spray bottle.
3. Spray the cleaner onto the evaporator coils and allow it to sit for 10-15 minutes.
4. Use a soft brush to gently scrub the coils and remove any mold or debris.
5. Wipe down with a clean cloth and allow to dry.

4. Clear Drain Tube

1. Locate the AC drain tube, usually found under the vehicle near the firewall.
2. Inspect the tube for blockages; use compressed air to clear it if necessary.
3. Ensure that the drain tube is securely attached and has no leaks.

5. Final Assembly and Testing

1. Reassemble any panels or components that were removed.
2. Reconnect the battery and start the engine.
3. Run the AC on high for several minutes to ensure proper airflow and check for any remaining odors.