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
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General information
Park the vehicle as far as possible from moving
traffic in the event of a breakdown. In the event
of a flat tire, park the vehicle on a level surface.
If you are on a steep hill, be especially careful.
Set the parking brake.
Switch the emergency flashers on.
Have the passengers exit the vehi
Seals
Component Location Overview - Gaskets
1 - Flywheel
Removing an installing. Refer to
→ Chapter "Flywheel, Removing and Installing".
2 - Left Flange Shaft Seal
Replacing. Refer to
→ Chapter "Left Seal, Replacing".
3 - Front Differential
4 -&nbs
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