Fans are controlled by a fan switch and VERY dodgy ford wiring.
A rewire is a MUST DO THING.
CTS sensor only gives info to ECU, fan control totally seperate, most end up burning out the fusebox terminals sometimes with fires etc!!
75 miles on a tenner is pushing it a bit unless he is extrememly gentle, my stage one used to do on a run 34, but was GGR chip, but buggered if I can drive that sensibly for long, didn't get the car to do that!!
tabetha