All heating appliances must have thermal fuses to prevent a fire. They’re in line with the power inside the case clipped to the heating element section.
One version looks like a 3/16” diameter x 1/2” cylinder with an epoxy tapered plug in one end. One wire is attached at each end.
Another common version is a 1/2” diameter x 3/8” high can with 2 mounting tabs and 2 spade lugs for the wires.
I hope it has the rating marked, usually in Centigrade, otherwise you’ll have to find it. Thermal fuses are made in a wide variety of temperature ratings - it’s dangerous to guess it.