Have a X reg Fiesta zetec started over heating today water levels and oil fine anyone have any help?

There are a few things that could be bad, in order from most likely to not likely and not limited to..... bad thermostat-not opening, water pump vanes came off of water pump shaft, cooling fan is not working, clogged radiatorHave a X reg Fiesta zetec started over heating today water levels and oil fine anyone have any help?
Probably the thermostat needs replacing.Have a X reg Fiesta zetec started over heating today water levels and oil fine anyone have any help?
When does it over heat? Does it do it on the highway, when climbing a hill, or when in traffic?

dermatologist