This article contains the Troubleshooting Guide for the DCT400 / DCT450 Series Ninja® 12-in-1 Double Oven with FlexDoor™. This supports the following SKUs: DCT400, DCT401, DCT401C, DCT401CO, DCT401Q, DCT401QBK, DCT401QCM, DCT401QCP, DCT402BK and DCT451.