AUDI A4 1998 B5 / 1.G Heating And Ventilation System Servicing Owner's Manual

87-168


- Remove bolts -A-.
- Disconnect all electrical connections from instrument panel harness to
heater/air conditioner assembly.

Notes on installation: - Remove bolts -A-.
- Remove heater/air conditioner assembly towards passenger side.
- Install in reverse order of removal.
Replace all damaged heater/air conditioner assembly seals.Replace all removed cable tie wraps in the same location.Always replace evaporator inlet/outlet O-rings.Ensure refrigerant lines fit into evaporator without binding.Check evaporator line and heater core bulkhead grommets for correct
fit. Check evaporator drain and evaporator drain valve for correct fit (1996
page 87
-169
; 1997 page 87
-171
).
Pa
ge 21 of 24 Heatin
g and ventilation s
ystem, servicin
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11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
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pair&id=AUDI.B5.HA01.87.22

87-169

Evaporator housing drain, checking
(1996)


Notes: - Evaporator drain valve flap -A- must not stick, must close completely
and drain opening must be pointing downwards.
Remove drain valve downwards out of the floor panel.When installed, the drain valve must not be touching the heat shield.The drain valve must not stick as a result of wax or underbody
sealant. If complaints of moisture in passenger compartment exist, check
evaporator drain and drain valve and clean if necessary.
Pa
ge 22 of 24 Heatin
g and ventilation s
ystem, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.87.22

87-170


Notes: - Foam seal -B- must fit tightly against drain funnel -C-.
- Plate -A- must be fitted at drain in order to support foam seal.
The drain funnel and foam seal can only be replaced with A/C housing
with evaporator assembly removed (removing and installing heater/air
conditioner assembly page 87
-172
).
The stopper -D- on drain prevents liquid flowing back into the foam
seal.

Drain funnel -C- must be secured to floor panel and must not impede
operation of drain valve -E-.
Pa
ge 23 of 24 Heatin
g and ventilation s
ystem, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.87.22

87-171

Evaporator housing drain, checking
(1997 )


Notes:

Drip guide -A- on the evaporator housing drain prevents liquid from
flowing back into the foam seal -B-.

Should drip guide break off, install stopper -D- and seal with silicone
adhesive to the drain tube.
Pa
ge 24 of 24 Heatin
g and ventilation s
ystem, servicin
g
11/21/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.HA01.87.22