Hi Just collected a second hand ford galaxy and have the following problem Above the temperature gauge the red light is flashing even though the needle is in the normal position. have filled with water but still comes on flashing 15 seconds after starting the engine. the electric sensor to the expansion tank seems in place but the wires are very flimsy. I am trying to drive a 200 mile trip and am unsure whether to continue or not. any thoughts please would be welcomed