Samsung wall ovens run under the NV and NQ model prefixes, in single- and double-cavity configurations, with several models adding a combination microwave. A representative single wall oven is the NV51K7770SS, and a Flex Duo divider that splits one large cavity into two independently controlled zones appears on the higher tiers.
The characters after the prefix encode cavity size, the generation, the feature tier, and a finish suffix such as SS for stainless. Dual Cook lets the two Flex Duo zones run different temperatures at the same time, while Steam Cook, Air Fry, a self-clean cycle, and a Smart Dial control appear across the range, with Bespoke finishes on select models. The rating plate carrying the full model and serial number is on the front door frame, visible when the door is open — on a double or Flex Duo oven it is worth noting whether the fault is on the upper or lower cavity, which matters as much as the code number itself. The serial number on the same plate dates the build, which helps a technician tell an early NV51 production run from a later one and match the correct latch or relay revision.
That full model-and-serial string is what confirms the correct temperature sensor, relay, door latch, or control-board part, because Samsung has revised those internals across NV and NQ generations even where the outward design looks unchanged. Two ovens with the same model number but different serials can even take different door latches, so both numbers count. Record the complete number, and the cavity involved, before you book oven repair for a clear, upfront quote so the right part can be matched to your exact oven.