Audi A4: A/C System, General Information
Audi A4 (B9) 2016-2026 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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Opening navigation
Applies to: vehicles with navigation system
Fig. 140 Route guidance not started
The navigation system directs you to your destination,
around traffic incidents, and on alternative
routes, if desired.
Opening navigation
Applies to: MMI: Press NAVIGATION on the
home screen.
After accessing the na
Boot, Removing and Installing
Special tools and workshop equipment required
Torque Wrench 1331 5-50Nm -VAG1331-
Hose Clip Pliers -VAS6362-
Hose Clip Pliers -VAG1921-
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog prior to
starting procedure.
Mandatory Re
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