Checking condensate drain: Audi A4 Cabriolet B6/B7 / A4 B6/B7

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

Don't miss

• Check routing of condensate drain hose; it must not be twisted or crushed.
• In area of hole (E) check gap between noise insulation mat and floor panel (noise insulation mat must not make contact with installed condensate drain valve).
• There is no flap at the condensate drain valve (C). The flap function is assumed by a coil formed by the valve.

📋 Procedure

1. Check routing of condensate drain hose; it must not be twisted or crushed.
2. Remove condensate drain valve and condensate drain hose .
3. In area of hole (E) check gap between noise insulation mat and floor panel (noise insulation mat must not make contact with installed condensate drain valve).
4. Check condensate drain valve (C); it must not be gummed up with wax or underseal. [Note: There is no flap at the condensate drain valve (C). The flap function is assumed by a coil formed by the valve.]
5. Check for contamination of condensate drain hose (B) (pay attention to oval cross-section of hose (D)) and clean if necessary.

6. Use a piece of wire, for example, to check for contamination of condensate drain of air conditioner unit (F) and clean if necessary.
7. Check passenger compartment forced air extraction (via luggage compartment) .
8. Check signal for recognition of wiper operation at operating and display unit, Climatronic control unit J255.
9. Check dust and pollen filter for contamination and corresponding cover for correct installation .
10. Check the various control motors and the corresponding levers. Pay particular attention to position of air flow flap control motor V71 and air recirculation flap control motor V113 as well as the relevant flaps.
11. Check measured value of evaporator outflow temperature sender G263 (Reading measured value block, display group "“010”").
12. If the sender measured value is too low under the usage conditions described by the customer (colder than 0 °C for lengthy period at ambient temperature above 0 °C), pay attention to notes on checking cooling output .
13. If the measured value of the evaporator outflow temperature sender G263 is too high under the usage conditions described by the customer (greater than e.g. 10 °C although air conditioner is functioning properly), check the evaporator outflow temperature sender G263 (incorrect measured value can cause evaporator to ice up).

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