Partner Temperature 2008 Diesel

Hi: I'm new to forum. I have a very slow Internet service so I have not had the ability to navigate the forum.
I have a problem and I don't know where asking my question.

The needle of the temperature marker of my partner goes from being normal to taking some maximum red jump while a light on the board that says Stop. They are soon the needle reaches the maximum red, it returns to its original position.
The water temperature is normal, I take the plug and verify it.
I have the feeling that this jump corresponds to an electrical blow when the second electro is coupled.
I usually feel that when the needle takes that jump you hear the electro fan that turns to high revolution.
It can spend a whole week without presenting the fault as on a one -hour trip in normal conditions can do it to fifteen times.
Always the same, the needle is not stuck in red, paste in the red and the light is turned on on the board, in less than a second it passes to the normal position and can repeat it after 20 seconds or ten minutes.
We change the bulb and keep doing it.
I don't see peeled cables making dough or short.
I do not notice fuses in rare conditions, everything seems normal.
Did anyone go through the same?

Hi Fuser, I have the same problem in a 1.4 Naphtera, I read that it can be the electro -ventilator relay. Could you solve it?

That problem can occur, if the cooling system has not been purity properly and has air inside (in the part of the cabin heating); Open the circulation of the refrigerant to the heating system, with the hot engine and operating, allows the antifreeze to circulate completely throughout the system so that the air comes out of all hoses and components towards the recovery tank. Eliminate this possibility of failure.