Audi Audi S6 1999-2004 HVAC Specifications
Detailed technical specifications and diagnostic information for the HVAC system in the 1999-2004 Audi S6. Includes component details, refrigerant type, and troubleshooting procedures.
Overview Specifications
Comprehensive description of the HVAC specifications for the 1999-2004 Audi S6, including key features, measurements, and technical details. This section provides detailed insights into the heating, ventilation, and air conditioning system, ensuring optimal performance and maintenance.
How to Use
Use the search function to locate specific HVAC specifications by entering keywords such as 'blower motor', 'refrigerant capacity', or 'temperature control'. Use exact terms for precise results.
Navigate through the HVAC documentation sections using the table of contents. Each major section is divided into subsections for easy access to specific technical details.
Key Specifications
Refrigerant Capacity
750 ± 25 grams
Cooling Capacity
6.5 kW
Airflow Capacity
450 m³/h
Heater Core Capacity
5.5 liters
Compressor Displacement
160 cc
Available Specifications
HVAC System Overview
This section provides an overview of the HVAC system, including its components, functionality, and key specifications.
HVAC System Overview
This section provides an overview of the HVAC system, including its components, functionality, and key specifications.
System Components
- Dual-zone automatic climate control system
- Electrically driven blower motor with variable speed control
- Refrigerant type: R134a
- Heater core with a capacity of 5.5 liters
- Evaporator core with a surface area of 0.45 m²
System Functionality
- Automatic temperature regulation with dual-zone control
- Airflow distribution through 8 adjustable vents
- Recirculation mode for improved air quality
- Defrost and defog functions with integrated sensors
- Maximum cooling capacity: 6.5 kW
Note: The dual-zone system allows independent temperature control for the driver and front passenger.
Refrigerant System
This section covers the refrigerant system, including specifications, maintenance, and performance metrics.
Refrigerant System
This section covers the refrigerant system, including specifications, maintenance, and performance metrics.
Refrigerant Specifications
- Refrigerant type: R134a
- Total system capacity: 750 ± 25 grams
- Operating pressure: 1.5 - 3.0 MPa
- Refrigerant oil type: PAG (Polyalkylene Glycol)
- Oil capacity: 150 ± 10 ml
Performance Metrics
- Cooling efficiency: 95% at 25°C ambient temperature
- Maximum cooling output: 6.5 kW
- Compressor displacement: 160 cc
- Condenser surface area: 0.55 m²
- Evaporator temperature range: 2°C to 10°C
Note: Ensure refrigerant levels are within the specified range to maintain optimal cooling performance.
Air Distribution System
This section details the air distribution system, including ductwork, vents, and airflow control mechanisms.
Air Distribution System
This section details the air distribution system, including ductwork, vents, and airflow control mechanisms.
Ductwork and Vents
- Total duct length: 4.2 meters
- Number of adjustable vents: 8
- Vent material: ABS plastic with chrome finish
- Airflow capacity: 450 m³/h
- Duct diameter: 75 mm
Airflow Control
- Electronically controlled air mix flaps
- Variable blower motor speed: 0 - 12 V
- Air recirculation flap with servo motor
- Defrost flap with integrated temperature sensor
- Airflow distribution modes: Face, Foot, Defrost
Note: The air mix flaps ensure precise temperature control by regulating the mix of hot and cold air.
Control System
This section explains the HVAC control system, including sensors, actuators, and user interface.
Control System
This section explains the HVAC control system, including sensors, actuators, and user interface.
Sensors and Actuators
- Interior temperature sensor with ±0.5°C accuracy
- Exterior temperature sensor with ±1°C accuracy
- Sunlight sensor with 4-quadrant detection
- Actuator motors for air mix and recirculation flaps
- Evaporator temperature sensor range: -10°C to 50°C
User Interface
- Dual-zone digital climate control display
- Rotary dials for temperature adjustment
- LCD screen for system status and settings
- Auto mode for automatic temperature regulation
- Defrost and recirculation buttons with LED indicators
Note: The dual-zone display allows independent temperature settings for the driver and front passenger.
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Component Specifications
General Specifications
- System Type
- Automatic Climate Control
- Refrigerant Type
- R134a
- Refrigerant Capacity
- 750 ± 25 grams
- Compressor Type
- Variable Displacement
- Compressor Part Number
- 8D0260805B
- Blower Motor Type
- Brushless DC Motor
- Blower Motor Part Number
- 4B0820055
Temperature Control
- Temperature Range
- 16°C to 30°C
- Temperature Sensor Accuracy
- ±0.5°C
- Temperature Sensor Part Number
- 4B0820531A
- Control Unit Part Number
- 4B0820043C
Airflow Specifications
- Blower Motor Speed Range
- 0 to 12,000 RPM
- Airflow Volume Max
- 450 m³/h
- Airflow Distribution
-
- Face
- Footwell
- Defrost
- Airflow Direction Actuator Part Number
- 4B0820511
Heating System
- Heater Core Type
- Aluminum
- Heater Core Part Number
- 4B0820311
- Coolant Flow Rate
- 10 L/min
- Maximum Heating Output
- 6 kW
- Heater Valve Part Number
- 4B0820727
Cooling System
- Evaporator Type
- Plate and Fin
- Evaporator Part Number
- 4B0820031
- Condenser Type
- Parallel Flow
- Condenser Part Number
- 4B0820451
- Expansion Valve Type
- Thermostatic
- Expansion Valve Part Number
- 4B0820497
Filters
- Cabin Air Filter Type
- Particle and Activated Carbon
- Cabin Air Filter Part Number
- 4B0820439
- Filter Replacement interval
- 15,000 miles or 12 months
- Filter Efficiency
- 95% for particles > 0.3 microns
Pressure Specifications
- High Pressure Side Max
- 30 bar
- Low Pressure Side Min
- 1.5 bar
- Pressure Sensor Part Number
- 4B0820512
- Pressure Relief Valve Setting
- 35 bar
Electrical Specifications
- System Voltage
- 12 V DC
- Compressor Clutch Power Consumption
- 60 W
- Blower Motor Power Consumption
- 200 W
- Control Unit Voltage Range
- 9 to 16 V
Diagnostic Specifications
- Diagnostic interface
- OBD-II
- Fault Code Readout
- Via VAG-COM or equivalent
- Common Fault Codes
-
- 01271
- 01272
- 01273
- Diagnostic Sensor Part Number
- 4B0820513
Maintenance Specifications
- Refrigerant Recharge interval
- 24 months or as needed
- System Leak Check interval
- 12 months
- Lubricant Type
- PAG Oil
- Lubricant Quantity
- 150 ± 10 ml
- Belt Tension Specification
- 500 ± 50 N
Service Information Service
Detailed service requirements and schedules for the HVAC system
- Replace cabin air filter
- Check refrigerant level
- Inspect compressor belt tension
Ensure all connections are secure and free of leaks
- Recharge refrigerant
- Inspect evaporator and condenser for debris
- Check blower motor operation
Use only manufacturer-approved refrigerant and lubricants
- Replace expansion valve
- Inspect heater core for leaks
- Perform full system diagnostic
Replace any worn or damaged components immediately
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the refrigerant type and capacity for the 1999-2004 Audi S6 HVAC system?
What is the refrigerant type and capacity for the 1999-2004 Audi S6 HVAC system?
The 1999-2004 Audi S6 HVAC system uses R134a refrigerant. The total system capacity is approximately 850 grams (30 ounces). Ensure the refrigerant is handled according to EPA regulations and local laws.
Q2 How do I reset the HVAC system after replacing the cabin air filter?
How do I reset the HVAC system after replacing the cabin air filter?
To reset the HVAC system, turn the ignition to the 'ON' position without starting the engine. Press and hold the 'ECON' and 'AUTO' buttons simultaneously for 5 seconds. The system will reset, and the display will confirm the reset.
Q3 What is the recommended interval for servicing the HVAC system?
What is the recommended interval for servicing the HVAC system?
Audi recommends inspecting the HVAC system every 20,000 miles or 24 months, whichever comes first. This includes checking refrigerant levels, inspecting hoses and seals, and cleaning or replacing the cabin air filter.
Q4 How do I diagnose a lack of airflow from the HVAC vents?
How do I diagnose a lack of airflow from the HVAC vents?
A lack of airflow could indicate a faulty blower motor, clogged cabin air filter, or a malfunctioning HVAC control unit. Check the cabin air filter first, then inspect the blower motor and its resistor. If the issue persists, use a diagnostic tool to scan for fault codes in the HVAC control module.
Q5 What is the procedure for recharging the HVAC system with refrigerant?
What is the procedure for recharging the HVAC system with refrigerant?
To recharge the HVAC system, connect a refrigerant manifold gauge set to the low-pressure port. Start the engine and set the HVAC to maximum cooling. Add refrigerant slowly until the pressure reaches 25-45 psi on the low-pressure side. Do not overfill, as this can damage the system.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Audi S6 HVAC System Service Manual
Coming SoonOfficial Audi service manual detailing HVAC system maintenance, troubleshooting, and repair procedures for the 1999-2004 S6.
HVAC Refrigerant Handling Guide
Coming SoonComprehensive guide on safely handling and recharging R134a refrigerant, including EPA regulations and safety precautions.
Cabin Air Filter Replacement Tutorial
Coming SoonStep-by-step video tutorial on replacing the cabin air filter in the 1999-2004 Audi S6, including resetting the HVAC system.
HVAC Diagnostic Tool Compatibility List
Coming SoonList of diagnostic tools compatible with the 1999-2004 Audi S6 HVAC system for troubleshooting and fault code reading.
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