Installed thermostat 2 sensors in 2003 vw passat, passenger fan runs all the time, heat gage also doesn't work 4 motion 4.0 v8

SOURCE: 2003 vw passat fan runs a long time after engine is off

its not normal.its a coolant temp sensor which has malfunctioned causing the ecu to think the engine is hot even when its not.hence the fan on for so long after ignition switched off.the sensor needs to be changed and put on a diagnostic machine afterwards.just bring it to a garage.

SOURCE: 1999 vw passat 2.8 v6 speedo not working. trip

most of the older cars have a cable driven speedo but newer cars are elecitronic it could be the little motor behined the gages or the wiring going down to the tranny check the cheepest first

SOURCE: I have a 2001 vw passat GLX 4 motion. The mirror

double sided tape and bluetac worked for me!!

SOURCE: 2001 passat fuse box diagram

It would be easier if you mention what device you're working with and I can tell you what number location it's fuse is at. Symbols are only there to confuse the hell out of you, although it's true purpose is to be recognized as a global standard. Now if you want to make it easier for yourself, buying a Bentley's repair manual is the only way to go. I hate to tell you that there are no free manuals you can down load, it cost money and someones time to upload a manual just to share it freely on the net.

SOURCE: My 2003 VW Passat W8 engine fans turns on when the

Sounds like temp sensor that controls fan is faulty.This would cause fan to stay on all the time or not turn on at all.