What is this component that is from a box fan?
I found a box fan that somebody threw out on my street. Very clean, but didn't run. Found out that this piece in the picture was open, I bypassed it now it runs. What is this component? It has a temperature on it. Is it there to cut the power to the motor in case it overheats or it is just a fuse? Is it dangerous to run the fan without it? Thanks.