I was also on 3864 earlier on service X25, at least 4 times throughout the journey the buzzing noise and light signifying there is a 'problem with the water' according to the driver went off. The driver reqested that he changed bus.
The driver I had is a canny fellow as well, always has a chat with me. I'm not sure of his name but he is bald and wears black glasses.
RE: Go North East: Latest News & Discussion - May 2015