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Error code reference

Samsung Dishwasher Error Code OC

Overflow detected

Samsung codesSamsung dishwasher codes

Overflow detected: overflow sensor data equal to or less than 1V for 3 seconds; if occurred during set operating times, performs 5 min drain, retry, and displays OC.

First step from the service manual

Check the connections for the Overflow Sensor connector.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What OC means on a Samsung dishwasher

The OC error code on a Samsung dishwasher indicates that the overflow sensor has detected a water level exceeding the safe threshold. Specifically, the overflow sensor is outputting a signal of 1 volt or less for a continuous period of 3 seconds, which the control board interprets as an overflow condition. This sensor monitors water accumulation in the base pan of the dishwasher, which collects water if a leak develops anywhere in the wash system.

When the OC code triggers during an active wash cycle, the dishwasher initiates an automatic 5-minute drain sequence in an attempt to remove excess water. After this drain cycle completes, the unit retries operation. If the overflow condition persists, the OC code is displayed and operation halts. This built-in response is a protective measure designed to prevent water damage to surrounding cabinetry and flooring.

The most common root causes include water actually pooling in the base pan due to a genuine leak from hoses, door seals, or internal components, as well as a faulty overflow sensor that is sending a false low-voltage signal. The first diagnostic step is to inspect the overflow sensor's wiring connector for loose, corroded, or damaged pins, since a poor electrical connection can cause the sensor to report an incorrect voltage reading to the control board. If the connector checks out, the sensor itself and the components supplying water to the tub should be inspected for leaks or failures.

Source: manufacturer service documentation.

Common causes of OC

  1. 01

    Loose or faulty overflow sensor connector

    Wiring / connection

    A disconnected, corroded, or damaged wiring connector at the overflow sensor can cause it to report a false low-voltage signal below 1V, triggering the OC code even when no real overflow exists. Start by unplugging the dishwasher and reseating the sensor connector firmly.

  2. 02

    Water accumulated in the base pan

    Part replacement

    A genuine leak from a door gasket, hose connection, pump seal, or water inlet valve can allow water to collect in the drip pan at the bottom of the unit, activating the overflow sensor. Tilt the dishwasher carefully to drain the base pan and inspect for the leak source.

  3. 03

    Failed overflow sensor

    Part replacement

    The overflow sensor itself can fail and output a voltage at or below 1V even when the base pan is dry, causing a persistent false OC code. If the connector and wiring are intact and no water is present in the base pan, the sensor likely needs replacement.

  4. 04

    Clogged or kinked drain hose

    Wiring / connection

    A restricted drain hose can cause water to back up and overflow into areas it should not reach. Check the drain hose for kinks, blockages, or improper installation that could be causing water to accumulate.

  5. 05

    Leaking door gasket

    Part replacement

    A worn, torn, or misaligned door gasket allows water to escape around the door edge and drip into the base pan during operation. Inspect the full perimeter of the door seal for visible damage or gaps.

See the test procedure for each cause

Frequently asked questions about OC

What does OC mean on a Samsung dishwasher?
OC stands for overflow detected. It means the overflow sensor in the base of the dishwasher has registered a signal of 1 volt or less for at least 3 seconds, which the control board interprets as excess water in the base pan. When this happens during operation, the dishwasher automatically runs a 5-minute drain cycle and then retries before displaying the code and halting.
Is it safe to run my Samsung dishwasher when the OC code is showing?
You should not continue running the dishwasher until the cause of the OC code is identified. If real water has leaked into the base pan, continued operation could result in water damage to your floor and cabinetry. Check under and around the unit for moisture before attempting to restart it.
Will resetting my Samsung dishwasher clear the OC error?
A reset may temporarily clear the OC code, but the error will return if the underlying problem is not resolved. If water is present in the base pan, it must be removed and the source of the leak must be fixed. If the sensor or its connector is faulty, that component needs to be addressed before the code will stay clear.
How do I fix the OC error code on my Samsung dishwasher?
Start by unplugging the dishwasher and checking the wiring connector at the overflow sensor for looseness or corrosion, as this is the first recommended diagnostic step. If the connector is secure, check the base pan for standing water and inspect hoses, the door gasket, and the pump area for leaks. If no leak is found and the connector is intact, the overflow sensor itself may need to be replaced.
How much does it cost to repair a Samsung dishwasher showing the OC error?
Repair costs vary depending on the cause. If the issue is just a loose connector, there may be no parts cost at all. Replacing an overflow sensor typically costs between $20 and $60 for the part, while repairing a leak from a door gasket, hose, or pump seal can range from $30 to $150 or more in parts, plus labor if a technician is hired.

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