I would suspect a possible faulty temp sensor or fan clutch.
Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you.
this model only has an electric fan....I've ordered a new temp sender unit for tomorrow....I'll let you know
I am still waiting for a new temperature sensor. When I receive and fit itI will then know if your solution was correct and I will then rate youranswer accordingly