If your disposal is plugged into a GFCI (common in modern kitchens), it may have tripped independently of the thermal switch.
Use a flashlight to look into the sink opening. If you see an obstruction (like a bone or silverware), use tongs or pliers—never your fingers—to remove it. Manually Free the Blades: how to fix a insinkerator garbage disposal hot
If the unit is not hot, but simply not working, follow these steps: If your disposal is plugged into a GFCI
If your InSinkErator garbage disposal is hot to the touch and not working, it has likely triggered its thermal overload protector but simply not working