Evaporator Drain Tube: Service and Repair

Plenum Chamber Water Drain, Checking and Cleaning

Preparation






- Remove wiper arms.

- Remove the rubber seal - 1 - and remove plenum chamber cover - 2 - by carefully pulling it off retainers on windshield.

Checking

• The draining of water from plenum chamber may be impaired by deposits (leaves, diverse tree needles etc.) accumulating in plenum chamber water drains - A -. The water level in the plenum chamber then rises if the vehicle is taken to an automatic car wash or in the event of heavy rain, water enters via intake housing into the A/C unit and is blown by the Fresh Air Blower (V2) onto the evaporator together with the air conveyed.






• If both water grommets - B - in water drains - A - (right and left in plenum chamber) are blocked by leaves and pine needles, it may cause the drains to freeze up in winter and water can no longer drain out. After a short drive, heat emitted from engine and exhaust system melts the ice in the drains again and water may drain off again before vehicle arrives at the workshop.

• The water drain grommets - B - are attached from the top into the openings in the mounts close to the suspension strut tower.

Cleaning

- Perform the preliminary work.

- Clean deposits (leaves, pine needles) and other contaminants from left and right water drains - A - and plenum chamber.

Removing

- Perform the preliminary work.

- Remove the grommets - B - from the openings for the water drain opening - A - in the mount.

Installing

- Install the grommets - B - from above into water drain openings - A - in the mount.

- Check the grommets - B - after installing to make sure they function correctly.

- Install all removed components again in reverse order.