1998 AUDI A4 heater

If 22 C (71 F) is always displayed after
switching on the ignition regardless of the last
setting, check voltage supply to E87 (terminal
30) using wiring diagram.

E87 readout can be switched over from C to
F and vice versa by pressing the "temperature
+" and "recirculating air" buttons
simultaneously.

If E87 remains in operation after switching off
the ignition, test cable connection to E87
connector -D- contact -1- for short circuit to
positive (connection for auxiliary heater
operation) using wiring diagram.
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87-125

Removing and installing (A/C control head
with single display)

Removing

CAUTION!

Obtain security code for anti-theft radio.
Note customer's pre-set radio stations.
Disconnect battery Ground (GND) strap.
Remove radio or radion with navigation system
Repair Manual, Radio, Telephone, Navigation,
Repair Group 91


- Grip control head through radio opening and
slide rearward.

Notes:

Parts catalog The control head is held in the center console with 4 clips -A-.Before replacing the control head, ensure correct application (e.g. with
or without knockouts for switches for seat heaters)
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Press seat heater switches -C- back into control head so that latches -
B- are engaged. Make sure that the hose for the instrument panel interior temperature
sensor -G56- is not kinked or otherwise closed off.
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87-129

Fresh air blower (V2), removing and
installing (1996)

Remove glovebox, glovebox mounting and
mounting for passenger airbag
Repair Manual, Body Interior, Repair Group
70


Notes: - Remove 4 screws -A- and remove fresh air blower from heater/air
conditioner assembly.
- Install in reverse order of removal.
The fresh air blower must be turned slightly to allow removal from
heater/air conditioner assembly. Testing V2, output Diagnostic Test Mode (DTM) page 01
-42
.
Electrical test page 01
-115
.
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87-130

Fresh air blower -V2-, removing and
installing (1997 )

Remove glovebox
Repair Manual, Body Interior, Repair Group
70


Separating fresh air blower -V2- and mounting plate - Remove electrical connector -B-
- Remove bolts -A- and remove fresh air blower with mounting plate from
heater/air conditioner assembly.

- Depress locking tabs -A- and -B- with screwdriver.
- Separate fresh air blower from mounting plate.
- Disconnect electrical harness connectors -C-.
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87-131

Notes:

When re-installing the fresh air blower to the mounting plate, check for
correct installation position of tabs -A- and -B-. After installation check for correct fit or fresh air blower in heater/air
conditioner assembly.
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87-137

Notes for installing:

When installing flap motor, ensure that relay
lever -D- is correctly positioned ( illus. A87
-
0161 on page 87
-136
).

Install strap -A- (on bracket for motor) first into mounting -B- (on
heater/air conditioning assembly). After installing, always check DTC memory page 01
-18
.
Testing -V85- page 01
-42
(output DTM).
Electrical test page 01
-115
.
Wiring harness must be installed so that it does not come in contact
with moving components (e.g. motor linkage). If the crank on the motor is positioned so that the lever can not be
hooked in or the motor can not be installed, connect motor to the
wiring harness, switch on ignition and place lever in appropriate
position by activating the button for air distribution on A/C control head
-E87-.
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87-146

Air flow flap motor -V71-, removing and
installing (1996)


- Remove heater/air conditioner assembly
complete with instrument panel page 87
-159
.

Notes: - Remove 3 screws -A- and remove flap motor.
- Install in reverse order of removal noting the following.
Markings on the gears of flap motor -B- and air flow flap -C- must be
aligned (longer tooth and continuous tooth intermediate space). If lever of flap motor rests against stop D, the intake shaft through the
air flow flap must be closed when the flap motor is installed (longer
side of air flow flap faces in direction of travel). After installing, check DTC memory page 01
-18
.
Testing V71, output Diagnostic Test Mode (DTM) page 01
-42
.
Electrical test page 01
-115
.
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