Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Reason:
Air conditioner components left open for a lengthy period present a risk of moisture penetration. Air conditioners
which have been left open for a lengthy period cannot, therefore, be re-filled without replacing parts of the
system.
Painting work on vehicles with air conditioner
When carrying out paintwork repairs, ensure that the vehicle is not exposed to temperatures of more than 80
°C in the drying ovens or their preheating zones.
Reason:
The application of heat creates a severe build-up of pressure in the system which could cause it to burst.
2 - Notes on general repairs
2.1 - Notes on general repairs
Only if required by the relevant safety precautions
(=> Page 125 ).
The air conditioner refrigerant circuit must remain closed during all other normal repair operations.
Repair work which can be performed on the heater and air conditioner without opening the refrigerant circuit
are described in this workshop manual from page 129 onwards.
Note:
The connections for the switches described in this workshop manual are fitted with a valve which closes auto‐
matically when the switches are unscrewed. These switches may therefore be replaced with a full refrigerant
circuit in any VW and Audi workshop.
Repair work on the air conditioner that requires the refrigerant circuit to be drained and hence cannot be per‐
formed in every VW/Audi workshop, is described from page 191 onwards (vehicles should be sent to an VW/
Audi air conditioning service centre for the refrigerant circuit to be drained).
Repair work on the air conditioner involving the refrigerant circuit can be performed in a VW and Audi air-
conditioning service centre only.
Note:
VW and Audi air-conditioning service centres have the requisite equipment, tools and information material for
performing repair work on the refrigerant circuit.
=> Air conditioner with refrigerant R134a
2.2 - Notes on air conditioner in vehicles with map-controlled heating
In vehicles with map-controlled cooling (gradual introduction into vehicles with 1.6 litre engine as of model year
1999) into model years 1999 and 2000:
- Only an operating and display unit -E87 with part number 8L0 820 043 as of index "H" should be installed.
Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
1.1 - Safety precautions when working on cars with air conditioners and when handling
refrigerant 127
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