twins

i have a 2.3 16 v ford galaxy and it would be runing fine and then overheating the next i went to frauds and was sold a sensor which went into the thermostat housing they sold me the wrong thing as this controlled the temperture on the dashboard . Atfer reading on here it that it could be headgasket causing pressure to build up in my expansion bottle causing it to overheat i decided to see if i could find a radiator fan switch or sensor, there isnt one on this car but there is a real under the bonnet with number 419 on the top of it which is located in a black box which has a few wires coming out of along with a red wire from the battery well if you look underneath it you will see this relay . I shook the relay and low and behold my fan came on so the problem all along was a bad connection and the car has stopped overheating