I bought this Air fryer in August and now all of a sudden it will not heat. the knobs turn and the power indicator light still comes on but will not heat at all. I use it daily since my big oven went out and was so happy with the cooking results I opted to use it instead of getting a new large oven since the stove still works and this is the perfect size to cook meals for my family of three. But now I have to say reading other reviews and having my own experience it seems to be a thing with the french door air fryer that the heating elements don't heat properly. I have messaged customer service and will see what the response will be. Hopefully they can replace it so i can continue with this as my primary cooking method. I love everything else about it from the larger inside space for bigger pans to the french doors that open together and stay open while inserting or removing dishes from the oven. Doesn't take up much space and has really become a staple in my kitchen