There are 3 actuators that control the air flow. They have sensors in them which tells the control module their position. The sounds you are hearing are the actuators cycling and trying to sence their position which they cant. So they remain open and allow the hot air to come in. VCDSS would tell you which one is at fault, in any ways they have to be replaced. Items 4, 6 or 7
To the begining
Air-conditioning system with electronic regulation for Audi A4/Avant(A4) 2002 [EUROPA]
№
part number
description
remark
unit
model
Air-conditioning system with electronic regulation
1
8E1 820 021 E
Fan
lhd
1
1
8E2 820 021 E
Fan
rhd
1
2
8E1 820 511 F
actuator motor for air flow flap
lhd
light blue
V71
1
3
8E1 820 511 D
positioning motor for recirculated air operation
lhd
blue
V 113
1
3
8E2 820 511 D
positioning motor for recirculated air operation
rhd
blue
V 113
1
4
8E1 820 511 B
Servomotor for defroster flap
lhd
green
V 107
1
4
8E2 820 511 B
Servomotor for defroster flap
rhd
green
V 107
1
5
8E1 820 511 G
control motor for temperature regulating flap
left lhd
red
V 158
1
5
8E2 820 511 E
control motor for temperature regulating flap
right rhd
yellow
V 159
1
6
8E1 820 511 K
actuator motor, footwell flap foot well flap
lhd
white
V 70
1
6
8E2 820 511 H
actuator motor, footwell flap foot well flap
rhd
black
V 70
1
7
8E1 820 511 H
control motor for temperature regulating flap
right lhd
violet
V 159
1
7
8E2 820 511 F
control motor for temperature regulating flap
left rhd
brown
V 158
1
8
8E1 820 353 B
Air distribution housing
lhd
1
8
8E2 820 353 B
Air distribution housing
rhd
1
9
8E2 820 024
Evaporator housing
rhd
1
9
8E1 820 024
Evaporator housing
lhd
1
10
8E1 820 153
Intake duct
lhd
1
10
8E2 820 153
Intake duct
rhd
1
11
8E1 819 151
Footwell vent
lhd
1
11
8E2 819 151
Footwell vent
rhd
1
15
8E1 820 103
evaporator F >> 8E-3-285 000*
lhd
1
15
8E1 820 103 A
evaporator F 8E-3-285 001>>*
lhd
1
15
8E2 820 103
evaporator F >> 8E-3-285 000*
rhd
1
15
8E2 820 103 A
evaporator F 8E-3-285 001>>*
rhd
1
16
8E1 820 031
heat exchanger also use:
lhd
8E0 898 380
1, 1
16
8E2 820 031
heat exchanger also use:
rhd
8E0 898 380
1, 1
17
4B1 819 011
Auxiliary heater for air conditioner
LLKG Z35
1
17
4B2 819 011
Auxiliary heater for air conditioner
RLKG Z35
1
20
8E0 898 380
Gasket set
1
21
8E1 898 350
1 set: pipes for heat exchanger also use:
lhd
8E0 898 380
1, , 1
21
8E2 898 350
1 set: pipes for heat exchanger also use:
rhd
8E0 898 380
1, , 1
23
8E0 820 992 A
Bungs
1
24
8E1 816 311
air hose for models with cool box
lhd
1
24
8E2 816 311
air hose for models with cool box
rhd
1
-
8E0 820 701
Vent for vehicles with air condit. Glove compartment
1
8E0 820 701 4 PK
soul (black)
25
1K0 907 543 A
Temperature sensor
G 263
1
26
N10 424 101
hexagon head panel screw
4X16
X
28
4B0 820 539
Temperature sensor
G 262
1
29
4B0 820 539
Temperature sensor
G 261
1
30
8E1 260 113 A
water drain pipe
lhd
1
30
8E2 260 113 A
water drain pipe
rhd
1
34
8E0 260 155
drain tube
1
37
8E1 819 079
Retaining bar
lhd
1
37
8E2 819 079
Retaining bar
rhd
1
38
N01 028 73
Hexagon bolt
M6X16
4
39
N90 457 003
hexagon head bolt (combi)
M6POWX15, 5-S1
1
40
8E0 820 539
Temperature sensor evaporator
G89
1
41
Discont. / replace:
8E1 898 400 8E2 898 400
1, 1
lhd rhd
42
Discont. / replace:
8E1 898 400 8E2 898 400
1, 1
lhd rhd
43
Discont. / replace:
8E1 898 400 8E2 898 400
1, 1
lhd rhd
44
8E1 898 400
1 set attachment parts for heat exchanger
lhd
1
44
8E2 898 400
1 set attachment parts for heat exchanger
rhd
1
45
N10 095 101
Clamp
8X17
1
47
4B1 819 164
Cover for models without auxiliary heater
lhd
1
47
4B2 819 164
Cover for models without auxiliary heater
RLKG
1
-
8E0 819 425 B
Cover cap
1
-
8E1 898 001 B
1 set: levers for air distribution housing
lhd
1
-
8E2 898 001 B
1 set: levers for air distribution housing
rhd
1
-
8E0 898 001
1 set: levers for air distribution housing Defroster flap F >> 8E-4-280 000*
1
-
8E0 898 001 A
1 set: levers for air distribution housing Defroster flap F 8E-4-280 001>>*
1