Volkswagen Passat 1995 Repair Manual page 133

A/C refrigerant system, troubleshooting
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.HA01.87.6
Test 1: Air temperature drop from center
instrument panel outlet, checking (A/C
system cooling performance)
- Start engine.
- Set temperature control to maximum "cold".
- Press "A/C" button and select second blower
speed.
- Adjust air distribution to instrument panel
outlets.
- Insert thermometer into center instrument panel
outlet and raise engine speed to approximately
1500 RPM.
Specified result
With humidity normal and outside (ambient)
temperature between 20-25 C (68-77 F),
system is cooling satisfactorily if air temperature
from center instrument panel vent drops below
10 C (50 F) within 1 minute.
For higher ambient temperatures and/or higher
humidity, specified air temperature from center
instrument panel vent can be slightly higher.
If specified reading is not obtained, perform tests
2 and 3, then compare results of all three tests
table, Page 87-110 .
Page 4 of 10
87-107
12/7/2004