What does the 'Sud' code mean on my washing machine display?

The 'Sud' code indicates that a suds routine has automatically started because excessive suds were detected. This routine removes extra suds and assures proper rinsing of your garments. The 'Sud' message is displayed during rinsing and at the end of the cycle to inform you that the Suds Routine was activated. To prevent this, use only HE (High Efficiency) detergents.