Audi A4: A/C System, General Information
Audi A4 (B9) 2016-2023 Service Manual / Heating, Ventilation & Air Conditioning / A/C System, General Information
- Introduction
- A/C Technology Basic Principles
- Refrigerant R134a
- Refrigerant R134a Characteristics
- Refrigerant Oil
- A/C System Operation
- General Safety Precautions
- A/C System and Refrigerant R134a Safety Precautions
- Refrigerant Circuit, General Precautions
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Introduction
The purpose of this repair manual is to provide service
advisors and technicians with the basic knowledge needed to
ensure professional and competent procedures.
Note
Only the careful study
A/C Technology Basic Principles
Physical Principles
The four known states of water also apply to air
conditioning system refrigerants.
1 - Gaseous (invisible)
2 - Vapor
3 - Liquid
4 - Solid
Refrigerant R134a
Refrigerant R134a Physical Data
Vehicle air conditioning systems make use of the
vaporization and condensation process. In this case, one works
with a substance which boils easily, designated as ref
SEE MORE:
Rear Side Window, Removing and Installing
Undamaged Side Window, Removing, Sedan
Special tools and workshop equipment
required
Wedge Set -T10383-
Wedge 1 -T10383/1-
Cutting Tool for Bonded Windows -VAS6452-
Bonded Window Tool Kit - Pull Handle -VAG1351/1-
Follow repair instructions. Refer to
→ Chapter "Repair Information".
To co
Refrigerant R134a Characteristics
Commercial Names and Designations
Refrigerant R134a is currently available under the following
trade names:
H-FKW 134a
SUVA 134a
KLEA 134a
Note
Different trade names may be used in other countries.
Of the wide range of refrigerants available, this is the
only one which may be used
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