It's not a 3 minute egg but I've been boiling parts. The radiator fan switch closes around 190F. The switch has four number groupings stamped on the flat surface. One of the numbers is 92, I would guess that is for 92C.
I did a side by side test with the installed thermostat and the new out of the box 180F unit. The new part opened around 182F and the old one around 185F and did not open as much as the new unit.
So, in with the new and figure out a manual override to be over cautious.