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HOMESERVICE MANUALSAUDI2012A4 2.0T AVANT QUATTROREPAIR AND DIAGNOSIS (SINGLE PAGE)HEATING, VENTILATION & A/C (HVAC)GENERAL SERVICINGGENERAL, TECHNICAL DATA - REFRIGERANT R134A SERVICING (AVANT)00 GENERAL, TECHNICAL DATADIAGNOSIS AND TESTINGLEAK DETECTIONFINDING LEAKS USING VACUUM TEST WITH A/C SERVICE STATION OR WITH NITROGEN PRESSURE TESTING
2012 Audi A4 2.0T Avant Quattro

Finding Leaks Using Vacuum Test With A/C Service Station Or With Nitrogen Pressure Testing

2012 Audi A4 2.0T Avant QuattroSECTION Finding Leaks Using Vacuum Test With A/C Service Station Or With Nitrogen Pressure Testing

Vehicles with a high voltage system (hybrid vehicles) 

Read and follow all of the supplemental warnings for all work performed on vehicles with the high voltage system. Refer to HYBRID VEHICLE HIGH VOLTAGE SYSTEM PROCEDURES .

All vehicles 

-- Switch off the ignition.

NOTE:

Small leaks (less than 100 g of refrigerant seepage per year) are not often detected with the vacuum test or with the nitrogen pressure test. The amount of air coming in or the amount of nitrogen seeping out is too little to locate the position based on noise.

Also, leaks on the refrigerant circuit that are greater than 100 g of refrigerant seepage each year are not always detectable with the vacuum test or with the nitrogen pressure test, depending on the ambient conditions (ambient noise, leak location etc.). The incoming air and the quantity of nitrogen flowing out is currently too small to detect any noise and locate the faulty location.

Larger leaks on the refrigerant circuit (such as an impact from a rock on the condenser, greater than 100 g of seeping refrigerant per year) can be detected from noise, using the vacuum test or the nitrogen pressure test. Refer to EVACUATING REFRIGERANT CIRCUIT .

RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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