Evaporator Drain Tube: Testing and Inspection

Plenum Chamber Water Drain, Checking and Cleaning

• 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 heating and A/C unit and is blown by the fresh-air blower onto the evaporator together with the air conveyed.






• If both 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.

Checking and Cleaning

- Remove the windshield wipers and the cowl panel (plenum chamber cover).

- Check both water drains - A - (on the right and left sides inside the plenum chamber) and clean them if necessary.