Audi A4: A/C System, General Information
Audi A4 (B9) 2016-2025 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:
Level Control System Sensor
Overview - Front Level Control System Sensor
1 - Bolt
9 Nm
2 - Front Level Control System Sensor
Left Front Level Control System Sensor -G78-
Right Front Level Control System Sensor -G289-
With coupling rod and retaining plate
Removing and installing. Refer to
→&nbs
Luggage Compartment Side Trim Panel, Removing and Installing
Luggage Compartment Side Trim Panel, Removing and Installing, Sedan
Special tools and workshop equipment required
Trim Removal Wedge -3409-
Pliers -T40172C-
Omega Clip Tool -T40280-
Removing
- Remove the side cushion. Refer to
→ Chapter "Side Cushion, Removing and Installing".
-&nb
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