The temperature sensor is bad and needs to be replaced. It looks like a rod with dimensions of about 6 inches long and a 1/4 inch wide and should be at the back inside of the oven. You will need to remove the back panel of the oven to access the screws and wires to replace it.
You can order a new one through the place you bought the oven at or through the manufacturer. Let me know how this works out for you.
Answers & Comments
The temperature sensor is bad and needs to be replaced. It looks like a rod with dimensions of about 6 inches long and a 1/4 inch wide and should be at the back inside of the oven. You will need to remove the back panel of the oven to access the screws and wires to replace it.
You can order a new one through the place you bought the oven at or through the manufacturer. Let me know how this works out for you.
Benjamin