Removing, checking and installing condensation drain hose — AUDI

🧭 Before you start

Fits: Audi A3 (8P, 2003–2012)

• Special tools named: VAS 5051

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• When fitting the floor covering, take particular care to ensure that it does not squash the condensation drain (B).

📋 Procedure

1. Water drain for plenum chamber
2. Plenum chamber cover and cover for fresh-air intake housing for correct installation and damage
3. Dust and pollen filter for contamination and correct installation
4. Forced air extraction in luggage compartment
5. Operation of air flow flap and air recirculation flap and "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.

6. Signal for detection of wiper operation at operating and display unit, Climatronic control unit J255 (vehicles with automatically controlled air conditioner only) "Guided fault-finding" function of vehicle diagnostic, testing and information system VAS 5051.
7. Setting at air conditioner controls, air conditioning system control unit J301 (vehicles with manually controlled air conditioner)
8. Setting at operating and display unit, Climatronic control unit J255 (vehicles with automatically controlled air conditioner).
9. If the measured value of the evaporator output temperature sender G263 is too low (at ambient temperature above 0 °C, colder than 0 °C for lengthy period) or too high although the air conditioner is operating properly (e.g. greater than 10 °C), heed the notes on checking the cooling output .
10. Remove the glove compartment and centre console. General body repairs, interior68
11. In the area of the condensation drain hose, carefully fold back the floor covering until the condensation drain is visible. General body repairs, interior68
12. Check the condensation drain (B) for proper routing (eliminate any cross-sectional constriction for example) and for contamination.
13. Cover the area beneath the opening (D) (for the condensation drain (C)) with absorbent paper to stop any water running beneath the floor covering.
14. Remove the condensation drain (B).
15. Use a piece of wire, for example, to check for contamination of the condensation drain of the air conditioning unit (A).
16. Check the distance between the insulating mat in the transmission tunnel and the condensation drain (C) by way of the opening (D) in the floor panel. There must be enough of a gap for condensation to drain out of the condensation drain (C).
17. Install the condensation drain (B) such that it is neither twisted nor crushed.
18. When fitting the floor covering, take particular care to ensure that it does not squash the condensation drain (B).

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