Hi Just joined, I have a 2001 reg ford focus, the temperature gauge keeps going into the red when driving on the motorway. I've had the thermostat changed which worked ok for a while but the problem has returned .

driving at normal speeds no problems. had the water pump changed a couple of years ago, flushed the radiator the other day, got a new sensor

not over heating at all, not losing water just puzzled to what the hell going on , tried a new expansion cap which made no difference ,

Any one else had this happen and how did you fix it

Thanks