Troubleshooting

Test requirements

Using VAG 1551 Scan Tool (ST), check Diagnostic Trouble Code (DTC) memory for any electrical vacuum or air distribution malfunctions, see On Board Diagnostic (OBD) - Air conditioning; correct/repair as necessary before proceeding.

IF ONE OF THE FOLLOWING CONDITIONS EXISTS FOLLOW RECOMMENDED SERVICE:

A/C DOES NOT COOL (cooling has stopped completely)

- check A/C system pressures.

INSUFFICIENT COOLING DURING ALL DRIVING SPEEDS OR ENGINE SPEEDS (RPM)

- check A/C system pressures.

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

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

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