Samsung · Dishwasher

OC

Overfill or Overflow Condition

Severity

High

When a Samsung Dishwasher shows OC on its display, the internal diagnostic system has flagged a condition known as "Overfill or Overflow Condition". Most repairs for this code are straightforward and can be completed at home.

Owner's Summary

Water is filling your dishwasher without stopping. Close the water supply valve under the sink immediately and unplug the machine. This is the most important first step to prevent water damage to your kitchen floor.

Symptoms

Samsung dishwasher filling non-stop, water overflowing, OC error

Common Causes

Water inlet valve stuck open
Defective water level sensor
Pressure chamber clogged giving false empty signal
PCB relay failure keeping valve open

How to Fix

1 Immediately close water supply valve under sink
2 Unplug dishwasher from power
3 Drain excess water manually
4 Test and replace water level sensor
5 Replace inlet valve if it fails to close when unpowered

Tools You'll Need

Towels / Bucket Bubble Level

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

The PCB should de-energize the inlet valve solenoid when the water level sensor signals full. OC indicates this safeguard failed — either the sensor is not signaling correctly, or the inlet valve relay is stuck in the energized position.

Is It Safe to Keep Using?

Urgent. Turn off water supply and unplug immediately. Active flooding risk.

Technician's Pro Tip

Test the inlet valve by unplugging the machine — if water continues to trickle into the tub after power is removed, the valve's solenoid plunger seal has failed mechanically and the valve must be replaced regardless of electrical test results.

Related Codes

E2 — Samsung Washing Machine

Water Supply Error

High

4E — Samsung Washing Machine

No Water Supply Detected

High

5E — Samsung Washing Machine

Drain Error — Water Not Draining

High

Frequently Asked Questions

What does error code OC mean on a Samsung Dishwasher?

Code OC on a Samsung Dishwasher indicates "Overfill or Overflow Condition." In practice, the most common trigger is water inlet valve stuck open. Severity is rated high, and typical repair costs range from $20 to $220.

Can I fix OC myself, or do I need a technician?

Many cases of OC can be resolved without a technician. The first step to try: immediately close water supply valve under sink. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my dishwasher with code OC showing?

Urgent. Turn off water supply and unplug immediately. Active flooding risk.

How much does it cost to repair OC on a Samsung Dishwasher?

Repair costs for code OC typically range from $20 to $220. Water level sensor: $20–$60; Inlet valve: $40–$160; PCB: up to $220. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$20 – $220

Water level sensor: $20–$60; Inlet valve: $40–$160; PCB: up to $220