Volkswagen Passat 1995 Official Factory Repair Manual page 1352

Function tests
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW...
Checking temperature regulator
- Connect vacuum line to temperature regulator
(brass connecting tube or with notch).
- Start engine and let run at idle.
- Check regulator flap position after max. 20
seconds.
Temperature of
temperature regulator
Below 20 C
Above 30 C
Between 20 and
30 C
Page 13 of 13
24-99
Regulator flap
position
Cold air connection
sealed
Warm air connection
2- sealed
Between cold- and
warm air connection
6/12/2004