Audi Audi S4 1997-2002 HVAC Specifications
Detailed HVAC specifications for the 1997-2002 Audi S4, including A/C, heating, and climate control systems. Perfect for maintenance, repair, and upgrades.
1997-2002 Audi S4 HVAC Specifications Specifications
This document provides a comprehensive overview of the HVAC (Heating, Ventilation, and Air Conditioning) system specifications for the 1997-2002 Audi S4. It includes detailed information about system components, operation, maintenance, and troubleshooting. Use this guide to understand the functionality and technical aspects of the HVAC system, ensuring proper operation and maintenance. Refer to the sections below for specific details.
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Key Specifications
Compressor Type
Sanden SD-508
Condenser Size
26x12 inches
Evaporator Size
20x8 inches
Heating Output
Up to 40kW
Refrigerant Type
R-134a
Available Specifications
Overview of HVAC System
This section provides a general overview of the HVAC system in the 1997-2002 Audi S4, including its components and functionality. It covers the basic operation of heating, cooling, and ventilation systems.
Overview of HVAC System
This section provides a general overview of the HVAC system in the 1997-2002 Audi S4, including its components and functionality. It covers the basic operation of heating, cooling, and ventilation systems.
System Components
- Compressor: Rotary-style with electromagnetic clutch
- Condenser: Tube-and-fin design with fan
- Evaporator: Plate-and-fin type located behind dashboard
- Heater Core: Crossflow design integrated with HVAC module
- Blower Motor: Dual-speed with resistor control
- Controls: Manual or electronic (depending on trim level)
System Operation
- Heating system uses engine coolant to warm cabin air
- Cooling system uses R-134a refrigerant for air conditioning
- Ventilation system draws fresh air through cowl intake
- Airflow distribution controlled by vacuum actuators
- Temperature control via mixing valve and sensors
- System operation monitored by HVAC control module
Heating System Specifications
This section details the specifications and operation of the heating system in the 1997-2002 Audi S4, including components and technical details.
Heating System Specifications
This section details the specifications and operation of the heating system in the 1997-2002 Audi S4, including components and technical details.
Heater Core and Components
- Heater core dimensions: 8x4 inches
- Core material: Brass tubes with copper fins
- Inlet/outlet hose sizes: 1/2 inch ID
- Maximum operating pressure: 15 bar
- Heater core flow rate: 2-4 liters per minute
Heating System Controls
- Temperature blend door actuator: Dual-speed motor
- Heater fan switch: Dual-speed with resistor pack
- Cabin temperature sensor: NTC type
- Heater control valve: Wax-type for coolant flow
- Vacuum supply: From engine intake manifold
Cooling System Specifications
This section provides detailed specifications and information about the air conditioning and cooling components of the HVAC system.
Cooling System Specifications
This section provides detailed specifications and information about the air conditioning and cooling components of the HVAC system.
Air Conditioning Components
- Compressor type: Sanden SD-508 with 6-groove pulley
- Compressor displacement: 133 cc
- Condenser size: 26x12 inches
- Evaporator size: 20x8 inches
- Expansion valve: Capillary tube type
- Refrigerant capacity: 600g of R-134a
Cooling System Operation
- Compressor clutch engagement: Electromagnetic
- High-pressure cutoff: 250 psi
- Low-pressure cutoff: 30 psi
- Condenser fan operation: Temperature-controlled
- Evaporator temperature sensor: NTC type
- Refrigerant flow: Fixed orifice tube design
Maintenance and Troubleshooting
This section provides maintenance schedules, common issues, and troubleshooting tips for the HVAC system in the 1997-2002 Audi S4.
Maintenance and Troubleshooting
This section provides maintenance schedules, common issues, and troubleshooting tips for the HVAC system in the 1997-2002 Audi S4.
Regular Maintenance
- Replace cabin air filter every 15,000 miles
- Inspect coolant hoses annually
- Check refrigerant level every 2 years
- Clean condenser fins as needed
- Lubricate compressor clutch bearing annually
- Test heater core for leaks every 30,000 miles
Common Issues and Solutions
- Inadequate cooling: Check for low refrigerant or blocked condenser
- No heat: Inspect heater core hoses or control valve
- Blower motor noise: Replace motor brushes or entire unit
- Water leaks: Check heater core or evaporator drain
- Odors from vents: Clean or replace cabin air filter
- Temperature fluctuations: Check blend door actuator
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Component Specifications
Overview
- Type
- Manual Climate Control System
- Configuration
- Dual-Zone
- Platform
- Audi A4 (B5)
- Material
- Plastic and Aluminum Components
- Location
- Dashboard and Engine Compartment
Dimensions
- Evaporator Size
- 12x6 inches (30x15 cm)
- Condenser Size
- 34x12 inches (86x30 cm)
- Heater Core Size
- 8x4 inches (20x10 cm)
- Ducting Diameter
- 4 inches (10 cm)
- Blower Motor Housing
- 7x5 inches (18x13 cm)
Materials
- Blower Motor
- Steel with Plastic Housing
- Ducting
- Plastic with Insulation
- Heater Core
- Copper/Aluminum
- Evaporator
- Aluminum
- Hoses
- Rubber with Reinforced Layers
Features
- Temperature Control
-
- Dual-Zone Temperature Control
- Manual Temperature Adjustment
- Recirculation Mode
- Heated Air Option
- Air Distribution
-
- Vent Control Adjustment
- Recirculation Mode
- Defrost Mode
- Floor/Vent/Dashboard Air Distribution
- Filtration
-
- Cabin Air Filter
- Pollen Filter
- Activated Carbon Filter
- System Controls
-
- Manual Controls
- Cable-Operated Damper
- Blower Speed Adjustment
- Additional Features
-
- Air Quality Sensor
- Humidity Control
- Temperature Display
Safety Features
- Automatic Shut Off
-
- Crash Detection Shut-Off
- Overheating Protection
- Low Refrigerant Warning
- Pressure Relief
- Integral Pressure Relief Valve
- Condenser Protection
- Condenser Guard
- Overflow Protection
- Coolant Overflow Protection System
Comfort Features
- Cabin Air Quality
-
- Cabin Air Filter
- Pollen Filter
- Activated Carbon Filter
- Noise Reduction
-
- Insulated Ducting
- Silent Blower Operation
- Vibration Dampening Mounts
- Humidity Control
- Humidity Control System
- Smooth Operation
- Gradual Temperature Transition
Accessories
- Cabin Air Filter
-
- Cabin Air Filter Replacement Kit
- Pollen Filter Replacement
- Activated Carbon Filter Replacement
- Condenser Cleaning
-
- Condenser Cleaning Kit
- Fin Comb for Cleaning
- Coolant Flush Kit
- Duct Cleaning
-
- Duct Cleaning Brush Kit
- Evaporator Cleaning Spray
- Duct Sanitizer
- Hvac Vacuum
-
- HVAC System Vacuum Pump
- Refrigerant Recharge Kit
- Leak Detection Kit
Maintenance
- Service interval
- Every 15,000 miles or 12 months
- Service Items
-
- Replace Cabin Air Filter
- Check Refrigerant Level
- Inspect Hoses and Belts
- Clean Condenser Fins
- Verify Proper Airflow
- Maintenance Notes
-
- Use approved refrigerant only
- Check for leaks during service
- Ensure proper vacuum after service
Warranty
- Basic
- Miles: 50000Years: 4Coverage: Parts and Labor
- Powertrain
- Miles: 70000Years: 5Coverage: HVAC System Components
- Extended
- Miles: 100000Years: 7Coverage: Optional Extended Warranty
- Warranty Terms
-
- Warranty applies to original purchaser
- Transferable within family members
- Requires regular maintenance records
Production Details
- Manufacturer
- Audi AG
- Manufacturing Process
-
- Brazing of Heat Exchangers
- Injection Molding of Plastic Components
- CNC Machining of Metal Parts
- Robot Welding of Ducts
- Quality Control
- Testing: Pressure Testing, Leak Testing, Airflow Testinginspection: Visual Inspection, Dimensional Check, Functional Test
- Sustainability Practices
-
- Recyclable Materials
- Low VOC Coatings
- Energy Efficient Manufacturing
- Production Metrics
- Units Produced: Over 200,000 unitsProduction Time: Approx 8 hours per unit
Service Information for HVAC Service
Maintenance and service requirements specific to this component
- Inspect and replace cabin air filter
- Check refrigerant level and top-up if necessary
- Inspect hoses and belts for cracks or wear
- Clean condenser fins
- Verify proper airflow through vents
Ensure system is leak-checked after any service
- Deep clean evaporator core
- Inspect and clean blower motor
- Check heater core for leaks
- Inspect ducts for damage or blockage
- Test system performance
Use specialized tools for deep cleaning
- Replace refrigerant
- Overhaul or replace blower motor if necessary
- Inspect and replace heater core if leaking
- Replace any damaged duct sections
- Perform full system performance test
Major service - recommend professional technician
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the HVAC system in a 1997-2002 Audi S4?
What are the technical specifications of the HVAC system in a 1997-2002 Audi S4?
The HVAC system in the 1997-2002 Audi S4 features a dual-zone climate control system with automatic temperature regulation. It is compatible with R-134a refrigerant and includes a compressor driven by the serpentine belt. The system supports both heating and cooling functions, with airflow controlled by vacuum actuators. Compatibility with aftermarket parts requires verification of specifications to ensure proper operation.
Q2 What are the recommended maintenance requirements for the HVAC system?
What are the recommended maintenance requirements for the HVAC system?
Regular maintenance includes checking the refrigerant level annually, inspecting hoses and belts for wear, and replacing the cabin air filter every 15,000 miles. The system's vacuum actuators and sensors should be tested every 30,000 miles. It is also recommended to have the system serviced by a certified technician if any leaks or performance issues arise.
Q3 How do I replace the HVAC control module?
How do I replace the HVAC control module?
To replace the HVAC control module, first disconnect the battery. Remove the trim around the center console and unscrew the control module. Disconnect the electrical connectors and vacuum lines carefully. Install the new module by reversing the steps, ensuring all connections are secure. Reconnect the battery and test the system for proper operation.
Q4 Why is my HVAC system not cooling properly?
Why is my HVAC system not cooling properly?
Common causes include low refrigerant levels, a malfunctioning compressor, or blocked air vents. Check for refrigerant leaks, inspect the compressor belt, and ensure all vents are unobstructed. If issues persist, scan for fault codes using a VAG-COM tool and consult a professional for repairs.
Q5 How can I optimize the performance of my HVAC system?
How can I optimize the performance of my HVAC system?
Ensure proper ventilation by cleaning or replacing the cabin air filter. Check and recharge refrigerant levels as needed. Insulate exposed hoses to prevent heat loss. Regularly clean condenser coils and ensure proper airflow through the front grille. Upgrading to high-performance parts, such as a more efficient fan, can also improve cooling performance.
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 S4 HVAC Service Manual
Coming SoonDetailed instructions for diagnosing, maintaining, and repairing the HVAC system in 1997-2002 Audi S4 models.
Technical Bulletin: HVAC Compressor Update
Coming SoonProvides information on updated compressor designs and installation procedures for improved reliability.
Audi S4 Parts Catalog
Coming SoonComprehensive list of OEM and aftermarket parts for the HVAC system, including compatibility and ordering information.
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Technical Information
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