Audi a4 - temperatue issue

[amir_j]

Hello Tame Technician et al

Ive got an issue with the temperature gauge on my B5; The coolant Temperature gauge doesn't move at all during normal driving, assumed was the sensor for a while but now found in queuing traffic goes up & stays at halfway up so confused.

Any ideas?

[fatboy b]

Thermostat stuck open?

[Tame Technician]

as above

[amir_j]

Many thanks both