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| 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). |
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| 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. |
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| Check for contamination of condensate drain hose -B- (pay attention to oval cross-section of hose -D-) and clean if necessary. |
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| Use a piece of wire, for example, to check for contamination of condensate drain of air conditioner unit -F- and clean if necessary. |
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| In the event of moisture in passenger compartment: |
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| Check the forced ventilation of the interior (via the luggage compartment) → Chapter. |
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| Check signal for recognition of wiper operation at operating and display unit, Climatronic control unit -J255-. |
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| Check dust and pollen filter for contamination and corresponding cover for correct installation → Chapter. |
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| 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. |
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| Check the measured value for the evaporator outlet temperature sender -G263- (Read the measured value block, display group “010 ”). |
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| If the measured value from the sender is too low under the conditions of use described by the customer (colder than 0° C for lengthy periods at an ambient temperature above 0°), follow the instructions on testing the refrigeration capacity → Chapter. |
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| If the measurement value of the evaporator outlet temperature sender -G263- is too high under the operating conditions specified by the customer (although the air conditioner works trouble-free greater than, e.g. 10° C), check the evaporator outlet temperature sender -G263- (the evaporator may ice-up resulting from an incorrect value). |
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