Audi Audi A4 2009-2016

Audi Audi A4 2009-2016 HVAC Specifications

Detailed technical specifications and operational guide for the HVAC system in the 2009-2016 Audi A4. Includes component details, diagnostic procedures, and maintenance tips for optimal climate control performance.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the HVAC specifications for the 2009-2016 Audi A4, 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'.

Navigate through the HVAC documentation sections using the table of contents or by scrolling through the document. Each section is clearly labeled for easy access.

Key Specifications

Refrigerant Capacity

525 ± 25 g

Blower Motor Power

200 W

Temperature Range

16°C to 30°C

Airflow Capacity

450 m³/h

Operating Pressure

1.5 - 3.0 MPa

Available 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 compressor
High-capacity blower motor
Integrated cabin air filter
Refrigerant type: R134a

System Functionality

Automatic temperature control with dual-zone capability
Air recirculation mode for improved efficiency
Defrost and defog functions for windshield and side windows
Adjustable air distribution for footwell, dashboard, and windshield vents
Integrated humidity sensor for automatic defogging

Note: The dual-zone system allows the driver and front passenger to set individual temperature preferences.

Refrigerant System Specifications

This section details the refrigerant system, including capacity, pressure, and maintenance requirements.

Refrigerant Capacity

Total refrigerant capacity: 525 ± 25 g
Refrigerant type: R134a
Recommended oil type: PAG (Polyalkylene Glycol)
Oil capacity: 150 ± 10 ml
Operating pressure: 1.5 - 3.0 MPa

Refrigerant System Maintenance

Inspect refrigerant lines for leaks annually
Check refrigerant pressure during routine service
Replace cabin air filter every 15,000 miles or as needed
Ensure proper compressor belt tension
Use only Audi-approved refrigerant and oil

Note: Improper refrigerant handling can damage the system and void the warranty.

Blower Motor and Air Distribution

This section covers the blower motor, air distribution system, and related components.

Blower Motor Specifications

Blower motor power: 200 W
Airflow capacity: 450 m³/h
Motor speed control: PWM (Pulse Width Modulation)
Operating voltage: 12 V DC
Noise level: < 60 dB at maximum speed

Air Distribution System

Adjustable air vents with directional control
Dual-zone air distribution for driver and passenger
Automatic air recirculation based on external air quality
Integrated pollen filter for improved air quality
Defrost vents for windshield and side windows

Note: The air distribution system is designed to provide consistent airflow and temperature control.

Temperature Control and Sensors

This section provides details on the temperature control system and associated sensors.

Temperature Control System

Dual-zone automatic temperature control
Temperature range: 16°C to 30°C (60°F to 86°F)
Precision control: ±0.5°C
Integrated solar sensor for automatic adjustment
Heated seats integration for enhanced comfort

Sensor Specifications

Cabin temperature sensor accuracy: ±0.5°C
External temperature sensor range: -40°C to 50°C
Humidity sensor for automatic defogging
Solar sensor for automatic climate adjustment
Air quality sensor for automatic recirculation

Note: The solar sensor adjusts the climate control based on sunlight intensity.

Search Specifications

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Component Specifications

Overview

Type: Automatic Climate Control

Configuration: Dual-Zone Climate Control

Platform: Audi A4 B8

Materials: Plastic, Aluminum, and Copper

Location: Center Console and Dashboard

Dimensions

Overall Width: 11.8 in (300 mm)

Overall Height: 7.9 in (200 mm)

Overall Depth: 14.6 in (370 mm)

Evaporator Core Size: 10.2 x 6.7 in (260 x 170 mm)

Blower Motor Diameter: 4.7 in (120 mm)

Condenser Core Size: 25.6 x 12.2 in (650 x 310 mm)

Heater Core Size: 9.8 x 6.7 in (250 x 170 mm)

Materials

Housing: High-Strength Plastic

Evaporator And Condenser Coils: Aluminum

Heater Core: Copper

Ducting: Flexible Rubber and Plastic

Features

Climate Control

Dual-Zone Temperature Control
Automatic Air Recirculation
Humidity Sensor
Air Quality Sensor

Air Quality

Cabin Air Filter
Activated Charcoal Filter
Pollutant-Sensing Technology

Air Distribution

Multi-Zone Distribution
Variable Airflow Control
Rear Ventilation Ducts

Temperature Control

Electronic Temperature Control
Heated Airflow
Cooled Airflow

Noise Reduction

Insulated Ducts
Silent Blower Operation
Noise-Reducing Fan

Eco Friendly

Refrigerant Leak Detection
Energy-Efficient Compressor
Pollution Reduction System

Safety Features

System Protection

Overheat Protection
Pressure Relief Valves
Refrigerant Leak Detection

Sensors

Temperature Sensors
Pressure Sensors
Humidity Sensors

Emergency Shutdown

Automatic System Shutdown
Emergency Ventilation Mode

Comfort Features

Air Distribution Modes

Front Mode
Rear Mode
Mix Mode
Defrost Mode

Temperature Control

Dual-Zone Control
Synchronized Mode
Remote Temperature Control

Filtration

Cabin Air Filter
Pollen Filter
Activated Carbon Filter

Humidity Control

Humidity Sensor
Automatic Humidity Adjustment

Defogging

Quick Defog Mode
Automatic Defrost

Accessories

Filters

Cabin Air Filter Kit
Pollen Filter Replacement
Activated Charcoal Filter

Ducting

Heating Ducts
Cooling Ducts
Rear Air Ducts

Controls

Climate Control Module
Temperature Sensors
Blower Motor Resistor

Maintenance

Service interval: Every 12,000 miles or 12 months

Service Items

Cabin Air Filter Replacement
Evaporator Coil Cleaning
Condenser Coil Inspection
Refrigerant Level Check
Blower Motor Inspection
Duct Inspection

Maintenance Notes

Replace cabin air filter every 12,000 miles
Clean evaporator coil annually
Inspect condenser coil for debris
Check refrigerant levels during service

Warranty

Basic: Miles: 48,000 miles
Years: 4 years
Coverage: HVAC Components

Powertrain: Miles: 70,000 miles
Years: 5 years
Coverage: Compressor and Blower Motor

Emissions: Miles: 80,000 miles
Years: 8 years
Coverage: Refrigerant System

Maintenance: Miles: 12,000 miles
Years: 1 year
Coverage: Filter and Service Items

Production Details

Manufacturer: Name: Audi AG
Location: Ingolstadt, Germany

Manufacturing Process

Robotic Welding
Laser Cutting
Computer-Aided Assembly
Quality Control Scanning

Quality Control: inspection: 100% End-of-Line Testing
Certifications: ISO 9001, IATF 16949
Testing: Performance Testing, Durability Testing, Environmental Testing

Sustainability Practices

Recyclable Materials
Energy-Efficient Manufacturing
Emission Reduction Processes

Production Metrics: Units Per Year: Over 100,000 units
Production Cycle: 12 hours per unit
Quality Rating: 99.9% defect-free rate

Service Information for HVAC Service

Maintenance and service requirements specific to the HVAC system

12,000 miles

12 months

Cabin air filter replacement
Evaporator coil cleaning
Condenser coil inspection
Blower motor inspection
Refrigerant level check

Replace cabin air filter and inspect ducts for blockages

24,000 miles

24 months

Ducting inspection
Temperature sensor calibration
Fan speed controller check
Drainage system inspection

Check for refrigerant leaks and test system performance

36,000 miles

36 months

Compressor belt inspection
Expansion valve check
Heater core inspection
System performance test

Perform detailed system diagnosis and replace worn components

60,000 miles

60 months

Evaporator coil replacement
Condenser coil cleaning
Blower motor replacement
Refrigerant recharge

Major service recommended to maintain optimal performance

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the refrigerant type and capacity for the 2009-2016 Audi A4 HVAC system?

The 2009-2016 Audi A4 HVAC system uses R134a refrigerant. The total system capacity is approximately 525 grams (18.5 ounces). Always refer to the vehicle's service manual for exact specifications, as variations may exist between trims and model years.

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 process. This ensures proper airflow and system calibration.

What is the recommended interval for HVAC system maintenance?

Audi recommends inspecting the HVAC system every 15,000 miles or annually, whichever comes first. This includes checking refrigerant levels, cleaning or replacing the cabin air filter, and inspecting the blower motor and ducts for debris or damage.

How do I diagnose a weak airflow from the HVAC system?

Weak airflow can result from a clogged cabin air filter, a malfunctioning blower motor, or obstructed air ducts. Start by inspecting and replacing the cabin air filter if necessary. If the issue persists, check the blower motor resistor and wiring for faults. Use a diagnostic tool to scan for HVAC-related fault codes.

What are the common symptoms of a failing HVAC compressor?

Common symptoms include reduced cooling performance, unusual noises (such as grinding or squealing), refrigerant leaks, and the compressor clutch failing to engage. If any of these symptoms occur, have the system inspected by a qualified technician to avoid further damage.

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 A4 HVAC System Service Manual

Coming Soon

Official service manual for the 2009-2016 Audi A4 HVAC system, including detailed repair procedures and specifications.

Cabin Air Filter Replacement Guide

Coming Soon

Step-by-step guide for replacing the cabin air filter in the 2009-2016 Audi A4, including tools required and safety precautions.

HVAC System Troubleshooting Tips

Coming Soon

Comprehensive troubleshooting guide for common HVAC issues in the 2009-2016 Audi A4, including diagnostic codes and solutions.

Refrigerant Handling and Safety Guidelines

Coming Soon

Detailed guidelines for safely handling R134a refrigerant, including proper charging procedures and environmental regulations.

About the Author

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Alan Montanye

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