Samsung Dishwasher OC Error Code — What It Means
The OC code (also shown as 0C or oE) means the dishwasher sees an overfill, or more water in the tub than it should hold. The unit stops to avoid sending water where it does not belong.
Because overfill risks water under your cabinets, treat OC as a stop-now code and find the source before running again.
Common Causes
- Inlet valve stuck open A failed water inlet valve keeps feeding water past the target level.
- Drain problem backing up Poor draining leaves old water in the tub so the next fill reads as overfill.
- Stuck float switch A float jammed in the up or down position feeds the control a wrong level.
- Faulty level or pressure sensor A bad water level sensor reports more water than is actually present.
- Oversudsing from wrong detergent Excess suds raise the apparent water level and trip the overfill logic.
- Clogged filter or drain hose A blocked drain path holds water so the system never reads empty.
Step-by-Step Fix
- Stop the cycle right away and turn off the under-sink water supply to prevent flooding.
- Open the door and bail out standing water, then dry the tub bottom.
- Clean the filter assembly and confirm the drain hose and pump path are clear.
- Check that the float in the tub bottom moves up and down freely and is not stuck.
- Switch to the correct dishwasher detergent and a smaller dose to rule out suds.
- Reset the unit, turn the water back on, and run a rinse while watching the fill and drain.
- If the tub keeps overfilling with the water on, replace the inlet valve that is feeding too much water.
Parts Often Needed
| Part | Notes |
|---|---|
| Samsung dishwasher water inlet valve | Amazon | Replace a valve that stays open and overfills, matched to your model. |
| Dishwasher float switch | Amazon | Order if the tub float sticks or the switch fails to signal full. |
| Water level or pressure sensor | Amazon | Only if the model uses a serviceable sensor that misreads the level. |
When to Call a Pro
If you stop the feed, fix the drain, and the inlet valve still overfills after replacement, the control board may be holding the valve open. A technician can confirm whether the board or sensor is driving the overfill before you replace more parts.