Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2003CIVIC HX, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 7 (HVAC SYSTEMS (HATCHBACK))
2003 Honda Civic HX, Standard
Section 7 (HVAC Systems (Hatchback))
2003 Honda Civic HX, StandardSECTION Section 7 (HVAC Systems (Hatchback))
WARNING: This page is about a different variant/trim than selected.
- Special Tools
- Component Location Index
- A/C Service Tips & Precautions
- A/C Refrigerant Oil Replacement
- General Troubleshooting Information
- Diagnostic Trouble Codes Troubleshooting Index
- Symptom Troubleshooting Index
- System Description
- Circuit Diagram
- Diagnostic Trouble Codes Troubleshooting
- Notes
- DTC 7: An Open in the Air Mix Control Motor Circuit
- DTC 8: A Short in the Air Mix Control Motor Circuit
- DTC 9: A Problem in the Air Mix Control Linkage, Door, or Motor
- DTC 10: An Open or Short in the Mode Control Motor Circuit
- DTC 11: A Problem in the Mode Control Linkage, Doors, or Motor
- DTC 12: A Problem in the Blower Motor Circuit
- DTC 14: An Open in the Evaporator Temperature Sensor Circuit
- DTC 15: A Short in the Evaporator Temperature Sensor Circuit
- Recirculation Control Motor Circuit Troubleshooting
- Heater Control Power and Ground Circuit Troubleshooting
- Condenser Fan Circuit Troubleshooting
- Radiator and Condenser Fan Common Circuit Troubleshooting
- Compressor Clutch Circuit Troubleshooting
- A/C Pressure Switch Circuit Troubleshooting
- Air Mix Control Motor Test
- Air Mix Control Motor Replacement
- Mode Control Motor Test
- Mode Control Motor Replacement
- Recirculation Control Motor Test
- Recirculation Control Motor Replacement
- Evaporator Temperature Sensor Test
- Evaporator Temperature Sensor Replacement
- Power Transistor Test
- Heater Control Panel and Push Switch Assembly Removal and Installation
- Dust and Pollen Filter Replacement
- Blower Unit Removal and Installation
- Blower Unit Component Replacement
- Evaporator Core & Expansion Valve Replacement
- Heater Unit/Core Replacement
- Heater Valve Cable Adjustment
- Compressor Replacement
- Compressor Clutch Check
- Compressor Clutch Overhaul
- Compressor Thermal Protector Replacement
- Compressor Relief Valve Replacement
- Condenser Replacement
- Refrigerant Recovery
- System Evacuation
- System Charging
- Refrigerant Leak Test
- A/C System Test
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.