Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
♦ A/C (heater) control head, removing and installing, refer to
⇒ “5.7 Climatronic Control Module J255 “, page 124 .
1.10 Contact Corrosion
Contact corrosion can occur if inappropriate fasteners (bolts,
nuts, washers, rivets, plugs, grommets, adhesives etc.) are used.
For this reason, the manufacturer only installs fasteners with a
special surface coating. Also, rubber and plastic parts and adhe‐
sive consist of materials that do not conduct electricity. These
parts, which have been tested and are aluminum compatible, are
also available as replacement parts. Refer to Electronic Parts
Catalog (ETKA).
Note:
♦ Always install new parts if there is any doubt as to whether
parts can be reused.
♦ Original equipment replacement parts are recommended.
They have been tested and are compatible with aluminum.
Refer to the Electronic Parts Catalog (ETKA).
♦ Audi accessories are recommended. Refer to Electronic Parts
Catalog (ETKA).
♦ Damage due to contact corrosion is not covered by warranty.
1.11 Dryer Cartridge
Note
♦
There are various versions of the condenser and the installed
dryer cartridge -F- (the illustration shows the version installed
on a 5 cylinder vehicle with a Denso condenser): Refer to the
Electronic Parts Catalog (ETKA).
♦
The dryer cartridge -F- and the O-ring -B- are the same in all
condenser versions. Should a repair set is not be available,
either replace the condenser completely or use the parts from
the repair set from another condenser (in this example, from
the repair set from the condenser installed in the Audi A4 from
MY 2008). Refer to the Electronic Parts Catalog (ETKA).
Clean the plastic screw -A- and the filter -C- (with the
tube-E-) before using them again. The O-ring -D- only seal
inside the circuit and can be used again in this single case if it
is not damaged.
♦ ⇒ “5.18.6 Dryer Cartridge On Condenser“, page 166
♦ ⇒ “5.18.7 Dryer Cartridge On Modine Condenser“, page 168
♦ ⇒ “5.18.8 Dryer Cartridge, On Denso Condenser“,
page 171 .
1.12 Dust and Pollen Filter with Activated
Charcoal Insert
♦ There are different versions of the dust and pollen filter (with
and without an activated charcoal insert). Refer to the Elec‐
tronic Parts Catalog (ETKA). An Audi TT with A/C has a dust
and pollen filter with an activated charcoal insert is installed.
An Audi TT without A/C has a dust and pollen filter without the
activated charcoal insert.
♦ The activated charcoal filter element functions as a dust and
pollen filter, however in addition the activated charcoal filter
can also filter out gaseous pollutants, for example, ozone,
benzene, nitrogen dioxide from the air flow. The basic task of
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
1. General Information 33
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