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– Remove bolts -A- and remove clamps -B- from connections of
coolant pipes -C- and -D- at heater core -E-.
– Disconnect coolant pipes -C- and -D- from heater core -E-
(slide coolant pipes toward the bulkhead).
– Pull heater core -E- out of heating and A/C unit.
Caution
If it is necessary, bent lower part of instrument panel -A- to side
to remove heater core -E-. Carefully bend it only as far as nec‐
essary for removal so that the instrument panel is not dam‐
aged.
Installing
Installation is carried out in the reverse order while noting the fol‐
lowing:
– Check the heater core seals -A- and -B-.
Note
♦
Seal may curl up on insertion if not correctly bonded on.
♦
Cold air may flow past heater core if seal is damaged or not
properly fitted.
♦
Additional foam strips -A- are attached to the corners of the
heater core -B-. The foam strips -A- are supposed to stop any
rattling noises, which are common on diesel vehicles. Install
the strips on all heat exchangers (use self-adhesive foam
strips, part number 191 819 069, refer to the Electronic Parts
Catalog).
– With the heater core removed, check heating and A/C unit for
soiling (via heater core opening -A-).
– Remove any dirt or coolant still inside the A/C unit (heater)
after the heat exchanger is removed.
– Slide heater core into A/C (heating) unit.
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
148 Rep. Gr.87 - Air Conditioning