Hi Guys
I have a weird phenomenon with the engine temperature indicator.
Usually, when I am stuck in traffic the engine heat raises to 3/4 of the indicator (the last white line before the red)
I was a bit affraid since it also goes a bit further then that so it can be near the red line. When I parked the car, I turned the engine off but then i turned the ignition switch on without starting the car and I saw that the heat indicator is a little above the middle (below the last white line).

If I start the car - it goes above that last white line. if I turn it off and turning the ignition switch to ON then it is in the middle of the indicator...
I have been told that it seems that the engine heat is fine so there is an electrical problem somewhere...but where should I look for it? I also noticed that when I turn my lights on, the indicator jumps up a little bit.
Any suggestions?
Thanks!