Audi A3 1997 Manual page 4

Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
1.8 Removing and installing air duct to defroster vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
1.9 Heating, heater control and air ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
1.10 Removing and installing heater control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100
1.11 Detaching and fitting Bowden cables from/on heater control . . . . . . . . . . . . . . . . . . . . . . . .104
1.12 Connection diagram for Bowden cables to the heater control . . . . . . . . . . . . . . . . . . . . . . . .104
1.13 Connection diagram for Bowden cables on the heater control . . . . . . . . . . . . . . . . . . . . . . . .105
1.14 Removing, installing and adjusting Bowden cables from/on the heater control . . . . . . . . . .105
1.15 Replacing the bulb for heater control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
1.16 Removing and installing fresh air blower -V2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
1.17 Removing and installing series resistor -N24 for fresh air blower . . . . . . . . . . . . . . . . . . . .108
1.18 Removing and installing positioning motor for fresh/recirculated air flap -V154 . . . . . . . . . .109
1.19 Checking the function of the positioning motor for fresh/recirculated air flap -V154 and switch
-E159 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110
1.20 Removing and installing footwell vent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .112
1.21 Removing and installing dust and pollen filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113
1.22 Connection diagram for vacuum hoses for actuating the refrigerant shut-off valve . . . . . . . .114
1.23 Notes on heater in vehicles with map-controlled heating . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
2 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
2.1 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .116
2.2 Special tools, testers, measuring instruments and auxiliary items required . . . . . . . . . . . . . .116
3 Removing and installing heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
3.1 Removing and installing heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
3.2 Removing and installing heating system heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . .122
4 Servicing electrical additional heater - Vehicles with TDI engine . . . . . . . . . . . . . . . . . . . . . .123
4.1 Servicing electrical additional heater - Vehicles with TDI engine . . . . . . . . . . . . . . . . . . . . . .123
4.2 Checking function of electrical additional heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123
87 - Air conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
1 Safety precautions when working on cars with air conditioners and when handling refrigerant
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1.1 Safety precautions when working on cars with air conditioners and when handling refrigerant
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2 Notes on general repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
2.1 Notes on general repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
2.2 Notes on air conditioner in vehicles with map-controlled heating . . . . . . . . . . . . . . . . . . . . . .127
3 Repairing refrigerant circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
3.1 Repairing refrigerant circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129
3.2 Air conditioner pressure switch -F129 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135
3.3 Remove and install High-pressure sensor -G65 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
3.4 O-ring seals for refrigerant circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
3.5 Detach and re-attach compressor from/to bracket (4 cyl. petrol engine) . . . . . . . . . . . . . . . .138
3.6 Detach and re-attach compressor from/to bracket (4 cyl. petrol engine) . . . . . . . . . . . . . . . .138
4 Repairing the air conditioner magnetic clutch -N25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
4.1 Repairing the air conditioner magnetic clutch -N25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .139
4.2 Sanden compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
4.3 "Zexel" compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
5 Components for the control and regulation of the air conditioner (in the engine compartment)
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5.1 Components for the control and regulation of the air conditioner (in the engine compartment)
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5.2 Removing and installing radiator fan control unit -J293 . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
5.3 Checking condensation drain, removing and installing valve . . . . . . . . . . . . . . . . . . . . . . . .161
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
5.4 Removing and installing heat insulation for the expansion valve . . . . . . . . . . . . . . . . . . . . . .162
with respect to the correctness of information in this document. Copyright by AUDI AG.
5.5 Connection diagram for vacuum hoses for actuating the refrigerant shut-off valve . . . . . . . .163
6 Components for air conditioner control and regulation (in the passenger compartment) . . . .165
6.1 Components for air conditioner control and regulation (in the passenger compartment) . . . .165
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