This article contains the Troubleshooting Guide for the BL660 Series Ninja® Professional Blender. This supports the following SKUs: BL660, BL660A, BL660B, BL660C, BL660CO, BL660QCN, BL660QPL, BL660W, BL660WM, BL660WMC, BL661BBYC, BL663, BL663CCO, BL663CO, BL665QBK, BL665QCN, BL665QWH and BL740.