Subaru Subaru Legacy 2004-2008 HVAC Specifications
Explore the comprehensive HVAC specifications for the 2004-2008 Subaru Legacy, including system components, refrigerant details, and maintenance tips. Perfect for technicians and owners seeking reliable information for repairs and upgrades.
Overview Specifications
This document provides detailed HVAC specifications for the 2004-2008 Subaru Legacy. It includes information on system components, controls, and performance metrics. Use this guide to understand the HVAC system's functionality, troubleshoot issues, or identify key specifications. The document is organized into sections for easy navigation, with a quick reference table for essential details.
How to Use
Use the search function to find specific terms or components within the document. Enter keywords related to the HVAC system, such as 'blower motor' or 'refrigerant type,' to quickly locate relevant information.
Navigate through the document using the section titles and subsections. Each major section focuses on a specific aspect of the HVAC system, with detailed points listed under each subsection for easy reference.
Key Specifications
Refrigerant Type
R134a
Refrigerant Capacity
500-600 grams
Blower Motor Type
Single/Variable Speed
Cabin Air Filter Replacement
Every 15,000-20,000 miles
HVAC Control Panel
Manual/Automatic
Available Specifications
HVAC System Components
This section covers the primary components of the HVAC system in the 2004-2008 Subaru Legacy. Learn about the blower motor, evaporator, condenser, and other critical parts that ensure proper heating, ventilation, and air conditioning.
HVAC System Components
This section covers the primary components of the HVAC system in the 2004-2008 Subaru Legacy. Learn about the blower motor, evaporator, condenser, and other critical parts that ensure proper heating, ventilation, and air conditioning.
Blower Motor
- Located in the HVAC housing unit
- Provides airflow through the vents
- Controlled by the HVAC control panel
- Available in single-speed or variable-speed configurations
- Common failure points include motor brushes and bearings
Evaporator and Condenser
- Evaporator located inside the HVAC housing
- Condenser mounted in front of the radiator
- Both components use R134a refrigerant
- Evaporator cools air before it enters the cabin
- Condenser dissipates heat from the refrigerant
HVAC Controls
This section explains the controls and interfaces for the HVAC system. It includes details on the control panel, temperature settings, and airflow modes.
HVAC Controls
This section explains the controls and interfaces for the HVAC system. It includes details on the control panel, temperature settings, and airflow modes.
Control Panel
- Located on the center dashboard
- Includes temperature dials, fan speed controls, and mode selectors
- Automatic climate control available in higher trims
- Backlit for nighttime visibility
- Integrated with the vehicle's electrical system
Airflow Modes
- Options include face, feet, and windshield modes
- Defrost mode for windshield clearing
- Recirculation mode for cabin air reuse
- Automatic mode adjusts airflow based on temperature settings
- Manual override available for all modes
Performance and Maintenance
This section focuses on the performance metrics and maintenance requirements for the HVAC system. Learn about refrigerant capacity, system efficiency, and common maintenance tasks.
Performance and Maintenance
This section focuses on the performance metrics and maintenance requirements for the HVAC system. Learn about refrigerant capacity, system efficiency, and common maintenance tasks.
Refrigerant Capacity
- Uses R134a refrigerant
- Total system capacity: 500-600 grams
- Refrigerant type specified on the underhood label
- Overcharging or undercharging can reduce efficiency
- Regular checks recommended for optimal performance
Maintenance Tips
- Replace cabin air filter every 15,000-20,000 miles
- Inspect refrigerant levels annually
- Check for leaks in the evaporator and condenser
- Clean blower motor and vents periodically
- Ensure proper functioning of all control panel settings
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Component Specifications
Overview
- Type
- Automatic Climate Control
- Configuration
- Dual-Zone
- Platform
- Subaru Legacy 2004-2008
- Material
- Plastic, Aluminum, Rubber
- Location
- Dashboard and Engine Compartment
Dimensions
- Evaporator Core Length
- 12.5 inches (31.75 cm)
- Evaporator Core Width
- 8.2 inches (20.83 cm)
- Evaporator Core Height
- 2.1 inches (5.33 cm)
- Heater Core Length
- 10.8 inches (27.43 cm)
- Heater Core Width
- 6.5 inches (16.51 cm)
- Heater Core Height
- 1.8 inches (4.57 cm)
- Blower Motor Diameter
- 5.9 inches (15 cm)
Materials
- Evaporator Core
- Aluminum
- Heater Core
- Aluminum and Copper
- Blower Motor
- Plastic and Steel
- Ducting
- Rubber and Plastic
Features
- Climate Control
-
- Dual-Zone Temperature Control
- Automatic Temperature Adjustment
- Rear Defogger
- Air Quality Sensor
- Airflow
-
- Multi-Speed Blower
- Adjustable Vents
- Recirculation Mode
- Footwell Air Distribution
- Heating
-
- Rapid Heating
- Defrost Mode
- Heated Side Mirrors
- Cooling
-
- Rapid Cooling
- A/C Compressor with Variable Displacement
- Cabin Air Filter
- Controls
-
- Digital Display
- Rotary Knobs
- Push-Button Controls
- Steering Wheel Controls (Optional)
Safety Features
- Overheat Protection
-
- High-Temperature Cutoff
- Thermal Fuse
- Air Quality
-
- Cabin Air Filter
- Automatic Recirculation Mode
- Defogging
-
- Front Windshield Defogger
- Rear Window Defogger
Comfort Features
- Temperature Control
-
- Dual-Zone Adjustment
- Auto Mode
- Memory Settings
- Airflow Control
-
- Multi-Directional Vents
- Footwell Airflow
- Face-Level Airflow
- Noise Reduction
-
- Quiet Blower Motor
- Insulated Ducting
- Convenience
-
- Auto-Defog
- Steering Wheel Controls (Optional)
Accessories
- Filters
-
- Cabin Air Filter
- Pollen Filter
- Charcoal Filter
- Controls
-
- Remote Start (Optional)
- Steering Wheel Controls (Optional)
- Touchscreen Interface (Optional)
- Upgrades
-
- Heated Seats (Optional)
- Heated Steering Wheel (Optional)
- Rear HVAC Controls (Optional)
Maintenance
- Service interval
- Every 15,000 miles or 12 months
- Service Items
-
- Inspect Cabin Air Filter
- Check Refrigerant Levels
- Inspect Blower Motor
- Test A/C Compressor
- Inspect Ducting for Leaks
- Maintenance Notes
- Regularly replace cabin air filter for optimal performance.
Warranty
- Basic Warranty
- Miles: 36,000Years: 3Coverage: Parts and Labor
- Powertrain Warranty
- Miles: 60,000Years: 5Coverage: A/C Compressor and Blower Motor
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Evaporator and Heater Core
- Extended Warranty
- Miles: 100,000Years: 10Coverage: Optional Extended Coverage
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Automated Assembly
- Precision Welding
- Quality Testing
- Quality Control
- Testing: Pressure Testing, Leak Detection, Performance CalibrationStandards: ISO 9001 Certified
- Sustainability Practices
-
- Recyclable Materials
- Energy-Efficient Production
- Low-Emission Manufacturing
- Production Metrics
- Units Per Year: 500,000Defect Rate: 0.01%
Service Information for HVAC Service
Maintenance and service requirements specific to the HVAC system
- Inspect Cabin Air Filter
- Check Refrigerant Levels
- Test Blower Motor Operation
- Inspect A/C Compressor
- Check Ducting for Leaks
Replace cabin air filter if necessary.
- Replace Cabin Air Filter
- Inspect Evaporator Core
- Check Heater Core Functionality
- Test Climate Control Sensors
- Inspect Electrical Connections
Use OEM parts for replacements.
- Flush and Refill Refrigerant
- Inspect and Clean Evaporator Core
- Test A/C Compressor Performance
- Check Blower Motor Bearings
- Inspect HVAC Control Module
Perform system pressure tests after refrigerant refill.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 Is the HVAC system compatible with all 2004-2008 Subaru Legacy models?
Is the HVAC system compatible with all 2004-2008 Subaru Legacy models?
The HVAC system is compatible with all 2004-2008 Subaru Legacy models, including sedan and wagon variants. However, specific configurations may vary depending on the trim level and optional features. Ensure compatibility by verifying your vehicle's VIN and consulting the manufacturer's technical specifications or a certified Subaru technician.
Q2 What are the maintenance requirements for the HVAC system?
What are the maintenance requirements for the HVAC system?
The HVAC system requires regular maintenance to ensure optimal performance. This includes replacing the cabin air filter every 12,000-15,000 miles, inspecting refrigerant levels annually, and checking for leaks or blockages in the system. Additionally, the blower motor and condenser should be inspected every 30,000 miles to prevent malfunctions and maintain efficiency.
Q3 How do I replace the cabin air filter in my 2004-2008 Subaru Legacy?
How do I replace the cabin air filter in my 2004-2008 Subaru Legacy?
To replace the cabin air filter, locate the filter housing behind the glove compartment. Open the glove box, remove the retaining clips, and gently lower the glove box. Unscrew the filter cover, remove the old filter, and insert the new one, ensuring it is oriented correctly. Reassemble the glove box and secure the clips. This process typically takes 10-15 minutes.
Q4 Why is my HVAC system blowing warm air instead of cold?
Why is my HVAC system blowing warm air instead of cold?
If your HVAC system is blowing warm air, it may indicate low refrigerant levels, a faulty compressor, or a clogged condenser. Start by checking refrigerant levels and topping off if necessary. Inspect the compressor for proper operation and ensure the condenser is free of debris. If issues persist, consult a professional for further diagnostics.
Q5 How can I optimize the performance of my HVAC system?
How can I optimize the performance of my HVAC system?
To optimize HVAC performance, ensure regular maintenance, including filter replacements and system inspections. Use high-quality refrigerant and ensure proper airflow by keeping vents unobstructed. During summer, park in shaded areas to reduce initial cooling load. In winter, allow the engine to warm up before using the heater for better efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2004-2008 Subaru Legacy HVAC Service Manual
Coming SoonDetailed service manual covering HVAC system diagnostics, maintenance, and repair procedures for 2004-2008 Subaru Legacy models.
Subaru Technical Service Bulletin: HVAC System Updates
Coming SoonTechnical bulletin addressing common HVAC system issues, updates, and recommended fixes for 2004-2008 Subaru Legacy vehicles.
Subaru Legacy HVAC Parts Catalog
Coming SoonComprehensive catalog listing OEM and aftermarket HVAC parts, including filters, compressors, and condensers for 2004-2008 Subaru Legacy models.
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Technical Information
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