Audi TT - Vibrations and noises | BEHR HELLA
Audi
TT
Model year: 2004–2005
Chassis No.: 8N*41015239 - 8N*51004029
Vibrations and noises
Poor air conditioning system performance
Different condensers
In the vehicles listed above, operating the air conditioning system may result in vibrations and noises.
These usually occur at about 3500 rpm and reach into the vehicle interior. Overfilling the air conditioning system has been considered as a potential cause.
Another complaint could be the poor performance of the the air conditioning system when exterior temperatures are high. In some cases, this is caused by having too little coolant.
The condenser should receive special attention in both cases. Both the vehicle manufacturer and the independent aftermarket use two different condensers (depth of 16 mm and 20 mm, see drawing). The vehicle manufacturer used a condenser with a depth of 20 mm (1J0820413N) up to chassis No. 8N-5-005-947; from chassis No. 8N-5-005-948 onwards, a condenser with a depth of 16 mm (8N0820411N) was used.
The correct coolant capacities are as follows:
20 mm depth = 750 g / 16 mm depth = 650 g
Note: Some independent aftermarket suppliers only offer one condenser design for all models. The fill volume has to be adjusted if necessary.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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