Join Date: Jan 2005
Location: The Netherlands
County: Zuid Holland
The fact that the warning light and fans work is normal, as 2 temp senders are used. One dedicated to temperature guage, and one for the ECU.....The ecu controls fans etc. In your case I guess there's a problem with the one for the guage. Either the sender, connections or gauge itsself.....
Depending on the car, it can be either a combined temp sender, mounted in the thermostat housing, whereby 2 senders are integrated in one sensor housing (can be seen by looking at number of electrical connections in the plug to the sender), or more rare, 2 completely seperate senders.