hello peoples..the trusty festa has an issue.i had to change out the dieing thermostat and coolant sensor.everything is back together and running.only thing is the fan doesnt cut in and it boils up.ive diconnected the cts and the fan fires up,temp display on dash flashes,temp and managment light come on.you plug it back in and it returns to normal after clearing fault code.i have read a post on here which would indicate that fan works,relay works and sensor on a live read out is giving a temperature etc..any ideas please?im scratching where my hair used to be.ive had the wagon 4 years and only heard fan cut in a handful of times.