What does the 'Sud' error code mean and how do I fix it?

The 'Sud' error code means there is excessive sudsing in the washer and the washer is running a suds reduction routine. Allow the washer to continue running. To prevent this in the future, use only HE detergent, always measure detergent carefully, and follow the detergent manufacturer's instructions based on your load size. Touch POWER to clear the code and restart the washer; if it appears again, call for service.