why does my Volkswagen Passat B8 (2015-2022) have condensation on the inside of windows

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked in a well-ventilated area.
• Disconnect the battery if working on electrical components.

2. Inspect and Replace Cabin Air Filter

• Locate the cabin air filter (usually found behind the glove compartment).
• Remove the glove compartment to access the filter housing.
• Carefully remove the old cabin air filter and inspect for debris.
• Install a new cabin air filter, ensuring proper orientation.

3. Check for Leaks

• Inspect door seals and window seals for wear or damage.
• Use a water hose to simulate rain and check for leaks from outside.
• Tighten or replace seals as necessary to prevent moisture entry.

4. Examine and Test HVAC System

• Turn on the HVAC system and set it to defrost mode.
• Ensure that the fan is operational and air is flowing through the defrost vents.
• Inspect the heater core for leaks; if found, replace it.

5. Remove Moisture Source

• Check for any water pooling in the footwells or under the seats.
• Use a wet/dry vacuum to remove excess water if present.
• If mold is detected, clean the affected areas with an appropriate cleaner.