Audi A4 temp problem

[rigy]

Hello

I m have just joined this forum, and already i m looking for some help.

I have an Audi A4 2.0 petrol 51 plate. I have had the temp sender replaced in the last 3 months because the temp gauge was not moving and this solved the problem and the car ran at 90'C as normal. However in the last week the gauge has started playing games again, it is working this time but it only gets up to about 55'C - 60'C when driving in traffic. If i leave the can running when parked it gets to 70'C - 80'C.

Any ideas, i have been told that it maybe that the thermastat is stuck open, if so how bigger job is it to replace and is it costly.

Hope someone can help

Thanks

Rigy.