✅ Roast Tray I Use (Amazon – paid link): br Disclosure: Some links above are affiliate links which means I may earn a small commission if you click and buy, at no extra cost to you.br br Ninja Support: br Do the heating elements in your Ninja Double Oven (DCT451) look like they’re turning on and off? That pulsing is normal temperature control. This guide shows what’s expected, how to set racks and trays, keep airflow clear, elevate food to prevent hot spots, and when to call support.