Helo from Denmark

just got a veyry nice and quite rusty model 2,3-16 1984 that i will try to fix

but the cooling fan never starts to run fast even when the water exess 100 degres celsius

I have looked in the forum under Kühlingsproblem but the third (3. dritte) kontakt

on the top of the waterpump only got one teminal and not two (it has written 100 degres celsius on it)

has anyone any knowlegde how to chek if the kontak is faulty ?