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.
Air Conditioning
2003 Hyundai XG350 LSECTION Air Conditioning
PROBLEM SYMPTOM TABLE - AIR CONDITIONING
| Symptom | Probable cause | Remedy |
|---|---|---|
| Compressor does not run, or runs poorly | Malfunctioning A/C relay | Check operation |
| Malfunctioning triple pressure switch | Check operation | |
| Malfunctioning thermostat | Check operation | |
| Malfunctioning A/C switch | Check operation | |
| Malfunctioning blower switch | Check operation | |
| Blown "A/C" fuse and/or "BLOWER" fuse | Replace | |
| Loose compressor drive belt | Readjust | |
| Battery voltage too low | Recharge battery | |
| Internal malfunction of compressor | Repair or replace compressor | |
| Short circuit in the magnet coil | Replace | |
| Oil on clutch face | Clean or replace clutch | |
| Gap between drive plate and pulley too large | Adjust gap | |
| Open circuit in the magnet coil | Replace | |
| Open or loose connection in electric circuit | Repair open-circuited point | |
| Low pressure is too high | Internal malfunction of compressor | Repair or replace compressor |
| Faulty contact at sensing bulb of the expansion valves | Repair | |
| Faulty insulation at sensing bulb of the expansion valves | Repair | |
| Expansion valves, opening is too large | Repair | |
| Low pressure is too low | Insufficient refrigerant | Charge refrigerant |
| Receiver-Drier clogged | Replace | |
| Expansion valves clogged | Replace | |
| Faulty thermostat | Check operation | |
| Frosted piping | Clean or replace pipes | |
| High pressure is too high | Insufficient cooling of the condenser | Check and clean condenser |
| Too much refrigerant | Discharge refrigerant | |
| Air in system | Evacuate and charge system | |
| Malfunctioning condenser fan motors | Check operation | |
| High pressure is too low | Insufficient refrigerant | Charge refrigerant |
| Internal malfunction of compressor | Repair or replace compressor | |
| No blower operation | Blown "BLOWER" fuse | Replace |
| Malfunction blower motor | Replace | |
| Faulty resistor | Replace | |
| Malfunction blower control switch | Replace | |
| Open or loose connection in electric circuit | Repair open-circuited point | |
| Insufficient air | Obstruction in the inlet of the blower unit | Remove obstruction |
| Clogged evaporator | Clean evaporator with compressed air | |
| Frosted evaporator | Check thermostat | |
| Leaking air | Check for leakage on both sides of cooling unit and air ducts | |
| Blown "COMP." fuse | Replace |
RENDER: 1.0x
NO RELATED
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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.