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 MANUALSAUDI2023E-TRON S SPORTBACK PREMIUM PLUSREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSAIR CONDITIONING - REFRIGERANT R134A SERVICING (REFRIGERANT CIRCUIT)
2023 Audi e-tron S Sportback Premium Plus
Air Conditioning - Refrigerant R134A Servicing (Refrigerant Circuit)
2023 Audi e-tron S Sportback Premium PlusSECTION Air Conditioning - Refrigerant R134A Servicing (Refrigerant Circuit)
- 87 Air Conditioning
- Safety Precautions
- Notes
- Safety Precautions When Working On A/C Systems
- Safety Precautions When Handling Refrigerant
- Safety Precautions When Working On Vehicles With Start/Stop System
- Safety Precautions When Working On Vehicles With High-Voltage System
- Safety Precautions When Working Near High-Voltage Components
- Safety Precautions During Road Test With Testing Equipment
- A/C System, General Information
- Introduction
- Additional Information Sources
- A/C Technology Basic Principles
- Refrigerant R134A
- Refrigerant R134A Properties
- Refrigerant Oil
- A/C System Operation
- General Safety Precautions
- Product Characteristics
- Refrigerant, Handling
- Pressure Reservoirs, Handling
- Refrigerant Circuit General Precautions
- After Charging A/C System And Before Activating A/C System
- Refrigerant Circuit General Information
- Refrigerant Circuit Components
- Refrigerant Circuit Component Allocation, Influence On High And Low Pressure Sides
- Notes
- Mechanically Driven A/C Compressor:
- Electrically-Driven A/C Compressor, Vehicles With High-Voltage System
- Condenser
- Evaporator
- Heat EXCHANGER For Heat Pump Operation
- Fluid Collector
- Reservoir
- RESTRICTOR
- Receiver/Dryer
- Expansion Valve
- Expansion Valve With Shut-Off Valve
- Refrigerant Shut-Off Valves
- Refrigerant Line With Inner Heat EXCHANGER
- Quick-Release Coupling Connections On Refrigerant Line
- O-Rings
- Refrigerant Circuit Pipes And Hoses
- Pressure Relief Valve
- Check Valves
- Overview - Refrigerant Circuit
- Refrigerant Circuit With Electrically-Driven A/C Compressor
- Quick-Release Coupling Connections On Refrigerant Circuit
- Switches And Sensors On Refrigerant Circuit And Connections
- Notes
- A/C Refrigerant High Pressure Switch -F23-
- Magnetic Clutch High Pressure Switch -F118-
- A/C Refrigerant Low Pressure Switch -F73-
- Refrigerant Circuit Connections With Switch Valve
- A/C Pressure Switch -F129-
- High Pressure Sensor -G65-, Refrigerant Circuit Pressure Sensor -G805-
- A/C Pressure/Temperature Sensors
- A/C Compressor Regulator Valve -N280-
- A/C Compressor Speed Sensor -G111-
- Refrigerant Temperature Sensor -G454-
- Electrical Components Not On Refrigerant Circuit
- Refrigerant Circuit Pressures And Temperatures
- Pressure Gauge, Tests And Measurements
- A/C Service And Recycling Units
- Refrigerant Circuit Repair Information
- Laws And Regulations
- Refrigerant Circuit
- A/C System Repair Information
- Refrigerant Circuit, Converting R12 To R134A
- A/C Service Station, Using
- Notes
- A/C Service Station, Important Usage Information
- A/C Service Station, Connecting For Measuring And Testing
- Refrigerant Circuit, Discharging With A/C Service Station
- Refrigerant Circuit, Evacuating With A/C Service Station
- Refrigerant Circuit, Charging With A/C Service Station
- A/C System, Operating After Charging
- Refrigerant, Transferring To A/C Service Station Storage Canister (Charging Cylinder Or Storage Cylinder)
- A/C Service Station, Draining
- Refrigerant Circuit, Cleaning With Compressed Air And Nitrogen
- Safety Precautions
- Glossary
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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.