Audi Audi S8 2012-2018

Audi Audi S8 2012-2018 HVAC Specifications

Detailed technical specifications and operational guide for the HVAC system in the 2012-2018 Audi S8. Includes system components, refrigerant details, climate control features, and troubleshooting tips.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2012-2018 Audi S8, including key features, measurements, and technical details. This section provides detailed insights into the heating, ventilation, and air conditioning system, ensuring optimal performance and comfort.

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 detailed technical information.

Key Specifications

Refrigerant Capacity

24 oz (680 g)

Cooling Capacity

14,000 BTU/h (4.1 kW)

Heating Capacity

18,000 BTU/h (5.3 kW)

Cabin Air Filter Efficiency

99% at 0.3 microns

Temperature Control Range

60°F to 84°F (16°C to 29°C)

Available Specifications

Climate Control System

Details about the advanced climate control system in the 2012-2018 Audi S8, including dual-zone automatic temperature control and air distribution features.

Dual-Zone Automatic Temperature Control

Independent temperature control for driver and front passenger
Temperature range: 60°F to 84°F (16°C to 29°C)
Precision control with 0.5°F (0.3°C) increments
Automatic air recirculation based on external air quality

Air Distribution System

Four-zone air distribution: face, footwell, windshield, and rear vents
Adjustable airflow intensity with 7-speed blower motor
Automatic defrost and demist functions
Rear seat climate control with independent settings

Note: The rear seat climate control is optional and part of the luxury package.

Refrigerant and Cooling System

Technical specifications for the refrigerant system, including capacity, type, and cooling performance.

Refrigerant Specifications

Refrigerant type: R-134a
Total system capacity: 24 oz (680 g)
Operating pressure: 150-300 psi (10.3-20.7 bar)
Refrigerant oil type: PAG (Polyalkylene Glycol)

Cooling Performance

Maximum cooling capacity: 14,000 BTU/h (4.1 kW)
Evaporator temperature range: 35°F to 50°F (2°C to 10°C)
Compressor type: Variable displacement
Condenser size: 18.5 x 12.5 inches (470 x 318 mm)

Note: Cooling performance may vary based on external temperature and humidity.

Heating System

Details about the heating system, including heater core specifications and performance metrics.

Heater Core Specifications

Heater core material: Aluminum
Core dimensions: 10 x 6 x 2 inches (254 x 152 x 51 mm)
Maximum heat output: 18,000 BTU/h (5.3 kW)
Coolant flow rate: 2.5 gallons per minute (9.5 liters per minute)

Heating Performance

Temperature rise: 50°F to 120°F (10°C to 49°C)
Warm-up time: 5-7 minutes from cold start
Integrated PTC (Positive Temperature Coefficient) heater for faster heating
Automatic heat distribution based on cabin temperature

Note: The PTC heater is activated only in extreme cold conditions.

Air Quality and Filtration

Information about the air filtration system and air quality features in the 2012-2018 Audi S8.

Cabin Air Filter

Filter type: Activated carbon with multi-layer filtration
Filter dimensions: 12 x 8 x 1.5 inches (305 x 203 x 38 mm)
Replacement interval: Every 15,000 miles (24,000 km)
Efficiency: 99% filtration of particulates larger than 0.3 microns

Air Quality Sensors

Integrated particulate matter sensor
Automatic air recirculation based on external pollutants
CO2 sensor for cabin air quality monitoring
Ionizer for air purification (optional)

Note: The ionizer is part of the advanced air quality package.

Search Specifications

Search by specification name, value, or description

Component Specifications

General Specifications

System Type: Automatic Dual-Zone Climate Control

Refrigerant Type: R134a

Refrigerant Capacity: 525 ± 25 grams

Compressor Type: Variable Displacement

Compressor Part Number: 4H0820803B

Blower Motor Type: Electronically Controlled

Blower Motor Part Number: 4H0820011A

Temperature Control

Temperature Range: 16°C to 30°C (60.8°F to 86°F)

Temperature Resolution: 0.5°C (0.9°F)

Sensor Accuracy: ±1°C (±1.8°F)

Sensor Part Number: 4H0820531C

Airflow Specifications

Blower Speed Range: 0 to 100%

Max Airflow Rate: 1200 m³/h

Airflow Direction Control

Face
Foot
Defrost
Auto

Air Quality Sensor Part Number: 4H0820531D

Heating System

Heater Core Type: Aluminum

Heater Core Part Number: 4H0820311A

Max Heating Capacity: 7.5 kW

Coolant Flow Rate: 12 L/min

Coolant Temperature Range: 80°C to 105°C (176°F to 221°F)

Cooling System

Evaporator Type: Aluminum

Evaporator Part Number: 4H0820031B

Max Cooling Capacity: 5.0 kW

Condenser Type: Parallel Flow

Condenser Part Number: 4H0820453A

Filtration System

Cabin Filter Type: Particle and Activated Carbon

Cabin Filter Part Number: 4H0820439A

Filter Efficiency: 99% for particles > 0.3 microns

Filter Replacement interval: 15,000 miles or 12 months

Electrical Specifications

System Voltage: 12V DC

Compressor Power Consumption: 400W max

Blower Motor Power Consumption: 200W max

Fuse Rating: 30A

Fuse Part Number: 4H0937153A

Diagnostic Specifications

Diagnostic interface: OBD-II

Fault Code Readout: Via VCDS or Audi Diagnostic Tool

Common Fault Codes

B10A1
B10A2
B10A3

Diagnostic Procedure: Refer to Audi Workshop Manual ELSA

Operational Limits

Max Ambient Temperature: 50°C (122°F)

Min Ambient Temperature: -30°C (-22°F)

Max System Pressure: 30 bar

Min System Pressure: 2 bar

Maintenance Specifications

Refrigerant Recharge interval: Every 2 years or 24,000 miles

Compressor Oil Type: PAG 46

Compressor Oil Capacity: 150 ml

System Leak Test interval: Every 2 years or 24,000 miles

Blower Motor Lubrication interval: Not required (Sealed Unit)

Service Information Service

Detailed service requirements and schedules for the HVAC system

15,000

Replace cabin air filter
Inspect refrigerant level
Check compressor belt tension

Use only Audi-approved parts and refrigerants

30,000

Recharge refrigerant
Inspect evaporator and condenser for debris
Check electrical connections

Perform system pressure test during refrigerant recharge

60,000

Inspect heater core for leaks
Check blower motor operation
Inspect all HVAC hoses and seals

Replace any worn or damaged components immediately

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2012-2018 Audi S8 HVAC system?

The 2012-2018 Audi S8 HVAC system uses R-134a refrigerant. The total system capacity is approximately 525 grams (18.5 ounces). Always refer to the vehicle's service manual for precise specifications.

How do I reset the HVAC system on a 2012-2018 Audi S8?

To reset the HVAC system, turn the ignition on, set the temperature to maximum heat, and press the recirculation button for 5 seconds. The system will reset, and the display will confirm the process. This procedure may vary slightly depending on the model year.

What is the recommended maintenance schedule for the HVAC system?

Audi recommends inspecting the HVAC system every 20,000 miles or 24 months, whichever comes first. This includes checking refrigerant levels, cabin air filters, and system performance. Replace the cabin air filter every 15,000-20,000 miles or as needed.

How does the dual-zone climate control work in the Audi S8?

The dual-zone climate control allows the driver and front passenger to set individual temperature preferences. The system uses separate sensors and actuators to maintain the desired temperature for each zone, ensuring optimal comfort.

What are the common symptoms of a failing HVAC compressor?

Common symptoms include reduced cooling performance, unusual noises (e.g., grinding or squealing), refrigerant leaks, and the compressor clutch not engaging. If any of these symptoms occur, consult a certified Audi technician for diagnosis and repair.

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 S8 HVAC System Service Manual

Coming Soon

Official service manual for the 2012-2018 Audi S8 HVAC system, including detailed repair procedures and specifications.

HVAC Troubleshooting Guide

Coming Soon

Step-by-step guide to diagnosing and troubleshooting common HVAC issues in the Audi S8.

Cabin Air Filter Replacement Tutorial

Coming Soon

Detailed instructions for replacing the cabin air filter in the 2012-2018 Audi S8, including part numbers and tools required.

Refrigerant Handling and Safety Guidelines

Coming Soon

Comprehensive guide on handling R-134a refrigerant safely, including environmental regulations and safety precautions.

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