How do you turn off a toaster oven?

The timer is spring activated so you should never try to turn it off, just let it run to off. There are three manually controlled dials on this toaster oven: temperature is the top dial, timer is the bottom dial and toast, bake, broil,warm, etc. is the middle dial.

Can leaving a toaster oven on cause a fire?

Often, toasters and toaster ovens are located beneath cabinets. When they ignite, they’re easily able to spread flames throughout the kitchen. Regularly cleaning and emptying excess crumbs can drastically cut down on toaster fires. Remember to add these appliances to your kitchen-cleaning regimen.