[CrickiKaze]

The relay is probable shot.

 

[riva2model64]

Hi everyone, I went into the dealership again - given all the circumstances and work done to it, they believe that the instrument gauge is faulty, and that there is no actual overheating of the engine. I might get the gauge replaced with a junkyard unit or mail it in to an electronics repair shop. It's a relief to be assured the engine never actually overheated, atleast.