Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 40 (REFRIGERANT R134A - SERVICING)
2009 Audi A6 Base
Section 40 (Refrigerant R134A - Servicing)
2009 Audi A6 BaseSECTION Section 40 (Refrigerant R134A - Servicing)
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- 87 - Air conditioning
- Laws and Regulations
- General Information
- Notes
- Introduction
- Air Conditioning System Principles
- Refrigerant R134a
- Refrigerant R134a Properties
- Refrigerant Oil
- Air Conditioning System, Operation
- General Work Safety
- Product Properties
- Refrigerant, Handling
- Pressure Vessels, Handling
- Safety Regulations for Working with Extraction and Charging Systems
- R134a Safety Precautions
- Basic Rules for Working on Refrigerant Circuit
- Refrigerant Circuit and Components
- Notes
- Components
- Refrigerant Circuit Design
- Refrigerant Circuit Quick-Release Connections
- Refrigerant Circuit Switches, Sensors, and Related Connections
- Refrigerant Circuit Pressures and Temperatures
- Refrigerant Circuit with Expansion Valve
- Refrigerant Circuit with Restrictor and Reservoir
- Using Pressure Gauge
- Service and Recycling Units
- Refrigerant Circuit Repair Information
- Refrigerant Circuit
- Notes
- Important Repair Notes
- Refrigerant Circuits, Converting from R12 Refrigerant to R134a
- Working with A/C Service Station
- Refrigerant Circuit, Discharging with A/C Service Station
- Refrigerant Circuit, Evacuating with A/C Service Station
- Refrigerant Circuit, Charging with A/C Service Station
- Air Conditioner, Starting after Charging
- Transferring Refrigerant to Charging Cylinder or Reservoir Bottle
- A/C Service Station, Draining
- Refrigerant Circuit, Flushing with Compressed Air and Nitrogen
- Refrigerant Circuit, Flushing with Refrigerant R134a
- Refrigerant Circuit, Determining Leaks
- Possible Refrigerant Circuit Concerns
- A/C Service Station, Connecting
- Refrigerant Circuit, Checking Pressures with A/C Service Station
- Notes
- Pressure Checking, Vehicles with Restrictor and Reservoir with Internally Regulated Compressor
- Pressure Checking, Vehicles with Expansion Valve and Receiver with Internally Regulated Compressor
- Pressure Checking, Vehicles with Restrictor, Reservoir and A/C Compressor Regulator Valve with Externally Regulated Compressor
- Pressure Checking, Vehicles with Expansion Valve, Receiver, and A/C Compressor Regulator Valve with Externally Regulated Compressor
- Refrigerant Circuit Components, Replacing
- Notes
- Leaking or Damaged Components except Compressor, Reservoir, or Receiver
- Compressor, Replacing without Flushing Refrigerant Circuit
- Compressor, Replacing Due to Leakage or Internal Damage
- Receiver or Accumulator and Restrictor, Replacing after Cleaning Refrigerant Circuit
- Receiver or Reservoir, Replacing without Flushing Refrigerant Circuit
- Refrigerant R134a/Refrigerant Oil Capacities and Specifications
- Notes
- Refrigerant R134a Capacities
- Notes
- Capacities for Audi A2 (8Z_) from 2001
- Capacities for Audi A3 (8L_) 1997 to 2004 and Audi TT (8N_) from 1999
- Capacities for A3 (8P_) from 2004
- Capacities for Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_) through 2002
- Capacities for Audi A4 (8D_) 1995 to 2002
- Capacities for Audi A4 (8E_) from 2001, Audi A4 Cabriolet (8H_) from 2003
- Capacities for Audi 100/Audi A6 (4A_) through 1998
- Capacities for Audi A6 (4B_) from 1998 and Audi Allroad
- Capacities for Audi A6 (4F_) from 2005
- Capacities for Audi V8 (4C_) to 1994
- Capacities for Audi A8 (4D_) 1994 to 2002
- Capacities for Audi A8 (4E_) from 2003
- Capacities for Audi Q7 (4L_) from 2006
- Approved Refrigerant Oils
- Notes
- Refrigerant Oil Capacities
- Capacities for Audi A2 (8Z_) from 2001
- Capacities for Audi A3 (8L_) 1997 to 2004 and Audi TT (8N_) from 1999
- Capacities for Audi A3 (8P_) from 2004
- Capacities for Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_)
- Capacities for Audi A4 (8D_) 1995 to 2002
- Capacities for Audi A4 (8E_) from 2001, Audi A4 Cabriolet (8H_) from 2003
- Capacities for Audi 100/Audi A6 (4A_) from 1998
- Capacities for Audi A6 (4B_) from 1998 and Audi Allroad
- Capacities for Audi A6 (4F_) from 2005
- Capacities for Audi V8 (4C_) to 1994
- Capacities for Audi A8 (4D_) 1994 to 2002
- Capacities for Audi A8 (4E_) from 2003
- Capacities for Audi Q7 (4L_) from 2006
- Testing Equipment, Tools and Materials
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.