Samsung Dishwasher Error Code OC — How to Fix (Over-level water error (overflow))

Error OC Explained

The Samsung Dishwasher error code OC is a common issue that can be caused by a range of factors, including a faulty water level sensor, clogged drain hose, or stuck float switch. When the dishwasher detects too much water in the tub, it will display the OC error code to alert the user to the issue. If left unchecked, this can lead to water damage, electrical issues, and other problems. For more information on other error codes, you can visit our pages on Samsung Dishwasher Error HE, Samsung Dishwasher Error 4E, Samsung Dishwasher Error 5E, Samsung Dishwasher Error LC, or Samsung Dishwasher Error LE.

Root Causes

• Faulty water level sensor: A faulty sensor can cause the dishwasher to overflow, leading to the OC error.
• Clogged or kinked drain hose: A blocked or kinked drain hose can prevent the water from draining properly, causing the dishwasher to overflow and display the OC error.
• Stuck float switch: A stuck float switch can prevent the dishwasher from draining properly, leading to the OC error.
• Control board issues: A faulty control board can cause a range of issues, including the OC error.

What Else You Should Know

Regular maintenance can help prevent the OC error and other issues with your Samsung dishwasher. Check the drain hose regularly for blockages or kinks and ensure it’s properly connected to the dishwasher and the sink drain. also, check the water level sensor and float switch for any signs of damage or corrosion. If you’re experiencing issues with your dishwasher, it’s essential to address them promptly to avoid further problems. For warranty information, you can contact Samsung customer support at 1-800-SAMSUNG (1-800-726-7864). The cost of parts and repairs can vary depending on the specific issue and the model of your dishwasher. On average, the cost of a water level sensor can range from $20 to $50, while the cost of a control board can range from $100 to $300. If safety is a concern at any point during the repair, a professional diagnosis might save you time and money. When working with electrical components, always unplug the power cord and take necessary safety precautions to avoid electrical shock or injury.

What Does Samsung Dishwasher Error Code OC Mean?

When your Samsung dishwasher shows the OC error code, the appliance thinks there is too much water in the tub. The water level sensor tells the control board how high the water is, and if that sensor reports a level that’s higher than the dishwasher’s limit, the OC code pops up. The machine will stop filling and shut off the drain to protect itself. If the problem isn’t fixed, the dishwasher can overflow, splashing water onto the floor or damaging the cabinet.

This error matters because it signals a serious mismatch between the water you put in and the water the machine can handle. A persistent OC code can lead to water damage, mold growth, and a ruined floor. Knowing what the code means helps you act quickly before the problem worsens.

Common Causes of Error OC

• Faulty Water Level Sensor (Model SMD‑100) – The sensor that checks water height can wear out or get dirty, sending a false “high water” signal.
• Clogged or Kinked Drain Hose – If the hose can’t drain properly, water builds up in the tub and triggers OC.
• Faulty Float Switch – The float rises with water; a stuck float can make the dishwasher think it’s full when it isn’t.
• Improper Water Inlet Valve Operation – A valve that stays open too long lets too much water in.
• High Water Pressure in the Supply Line – Excessive pressure pushes more water into the dishwasher than intended.
• Leaking or Damaged Tub Seal – A leak can cause the water level to rise unexpectedly, confusing the sensor.

How to Prevent Error OC

1. Keep the Drain Hose Clear – Inspect the hose every 6 months. Look for kinks, clogs, or bends that restrict flow.
2. Clean the Water Level Sensor – Every year, remove the sensor cover and wipe the sensor with a damp cloth.
3. Check the Float Switch – Gently lift and lower the float; it should move freely. If it sticks, clean the track.
4. Use a Water Pressure Regulator – Install a regulator if your home water pressure exceeds 80 psi; this keeps the inlet valve from over‑filling.
5. Inspect the Tub Seal – Look for cracks or gaps in the rubber seal. Replace it if you see any damage.

Estimated Repair Costs

All prices are estimates and can vary by region and labor rates.

Frequently Asked Questions

Q1: How long does it take to fix an OC error?
A1: If you replace the sensor or hose yourself, it usually takes 30–60 minutes. A technician might need 1–2 hours for a full diagnostic and repair.

Q2: Can I just keep the dishwasher running with the OC code?
A2: No. Running it can cause water to overflow, damaging your floor and creating a mold hazard.

Q3: Is the OC code related to the dishwasher’s cycle selection?
A3: Not directly. The code is triggered by water level, not by which wash cycle you choose. However, some cycles use more water, so a faulty sensor will still show OC.

Q4: How can I tell if the water level sensor is the real problem?
A4: After resetting the dishwasher and checking the hose and float, if the OC code returns, the sensor is likely at fault. Replacing it often resolves the issue.

Q5: Do I need to replace the entire control board if the OC error persists?
A5: Only if the sensor and float are good and the error keeps appearing. A faulty control board can cause false OC signals, but it’s a less common cause. A qualified technician can confirm before replacing the board.