Troubleshooting System

Using VAG 1551 Scan Tool (ST), check Diagnostic Trouble Code memory for any electrical, vacuum or air distribution malfunctions. Correct/repair malfunctions as necessary before proceeding.

If one of the following conditions exists follow recommended service.

1 A/C does not cool (cooling has stopped completely):
- Check A/C system pressures.
2 Insufficient cooling during all driving speeds or engine speeds (RPM):
- Check A/C system pressures.
3 A/C compressor noisy:
- Tighten A/C compressor and compressor bracket mounting bolts using torque wrench.
- Check routing of A/C refrigerant hoses and lines.
- Hoses and lines must not contact other components and must be installed without binding, reposition or realign as necessary
4 A/C compressor noisy immediately after switching A/C on and / or when driving around corners or braking (refrigerant shock). System is overcharged:
- Discharge A/C refrigerant system, evacuate and recharge.
5 With an otherwise properly operating A/C system, water sprays out of instrument panel vents:
- Check evaporator water drain hose for proper routing (should not be kinked).
- Check evaporator water drain valve.
- Must not be plugged with wax, dirt or undercoating (clean if necessary)
- Valve flap must close properly
- Check plenum tray.
- Must be properly installed and not damaged