why is there condensation inside my Volkswagen Golf MK7 (2015-2019)?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety during inspection.

2. Inspect Seals

• Remove any trim panels around the doors and windows to access seals.
• Visually inspect rubber seals for cracks, tears, or deterioration.
• Replace any damaged seals with OEM parts, ensuring a snug fit.

3. Clean or Replace Cabin Air Filter

• Locate the cabin air filter housing, usually under the dashboard.
• Remove the filter cover by unscrewing or unclipping it.
• Take out the existing filter and inspect it for dirt and moisture. Clean or replace it with a new one.

4. Check Air Conditioning Drainage

• Locate the A/C drain hose under the vehicle.
• Ensure the drain is clear and unobstructed. If blocked, carefully clean it out.
• Test the A/C system to confirm proper drainage of condensation.

5. Inspect Heater Core

• Check for coolant leaks by feeling for wet spots on the passenger side floor.
• If leaking, drain the coolant and replace the heater core, following the manufacturer's service manual for disassembly and reassembly.

6. Clear Sunroof Drains (if applicable)

• Locate the sunroof drains at the corners of the sunroof frame.
• Use compressed air or a flexible wire to clear any obstructions in the drain tubes.
• Test for correct drainage by pouring a small amount of water into the sunroof tray.