Asduming you've changed the thermostat 3 things off the top of my head
For did a recall for the water pump pipes which swapped the flow pipes around on the pump, it might have had a different pump fitted at some point
The fans don't work, spin them both to see if they aren't seized and then power them up from the fan switch on the thermostat housing
The switch may have failed as it's designed to work at 100/110 if it's the grey one
The green one fitted to the diesal version kicks in lower and then the one you want is red and was a Mondeo fitment