The little red one on the bottom? That's a reset button and you should be able to just push it in a few minutes after it pops. If that doesn't work then check the breaker in the panel to make sure you did not blow a breaker

What do you mean "fix".. These are overload devices to keep the motor from burning up. What's happening?

Follow Bobs advice. If the reset pops out you will have to give it some time to cool down and reset.' Have you resolved your problem yet? Back to you, Tom