Thanks for the question. The DV431 does not have a door lock mechanism like the washer does. You can open the door at any time and the dryer should stop automatically. The dryer does have a Child Lock for the control panel, however, to help prevent children from playing with the settings.
The lights on the dryer may have different patterns for different models, but if your dryer is heating and performing properly this should not cause any problems. If you experience any issues or would like additional information, please feel free to call 800-SAMSUNG or submit your contact information to our support team through the link below.
Online support form: http://www.samsung.com/us/support/o...
- Ms. Samsung