Samsung Dishwasher OC Error Code: Overfill Detected

Quick Answer

Samsung OC error code means the tub has overfilled. The float switch DD66-00057A is the most common cause when it sticks in the raised position. The inlet valve DD62-00136A is the second most likely part if water continues to enter after the cycle ends. Stop the dishwasher immediately and check under the sink for pooling water. Do not restart until the cause is identified.

SamsungDishwasherSeverity: criticalDifficulty: intermediate87% DIY Success

Time to Fix

20–60 min

Difficulty

intermediate

Parts Cost

$12 – $42

Tools Needed

Phillips screwdriver, Multimeter

What Does the OC Code Mean?

OC triggers when water level climbs too high. The float switch inside the tub is supposed to rise with the water and cut off the inlet valve. If the float is stuck up or physically jammed, it sends a false overfill signal. If the float is working but water keeps rising, the inlet valve is stuck open.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Float switch stuck in raised position (false overfill signal)40%

Water inlet valve stuck open - water enters even with power off24%

Control board miswiring or relay failure22%

Float arm physically jammed by utensil or debris14%

Symptoms You May Notice

OC code during fill cycle or at cycle start
Water level visibly higher than normal before code appears
Water entering tub when machine is off or between cycles
Machine stops immediately after beginning to fill

Can you reset a Samsung dishwasher to clear the OC code?

Hold Start/Cancel for 3 seconds to clear the OC code. The code will return immediately if the underlying cause (stuck float or open inlet valve) has not been repaired. Confirm the water level in the tub is below the overfill mark before restarting.

Tools Required for Diagnosis

Phillips screwdriverMultimeterFlashlight

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Open the dishwasher door and locate the float switch - a small

Open the dishwasher door and locate the float switch - a small plastic dome near the front left or front center of the tub floor.

Lift the float cap by hand

Check if water enters the tub with the machine powered off and

Replace the faulty component (float switch or inlet valve) based

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
Float SwitchDD66-00057A · $12–$22	DD66-00057A	$12 – $22
Water Inlet ValveDD62-00136A · $25–$42	DD62-00136A	$25 – $42

Verify part fitment for your Samsung model

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs

Labor Approach

Our Verdict

REPAIR

Estimated Cost: $27 (Parts) vs $725 (New Machine)

Frequently Asked Questions

What does OC mean on a Samsung dishwasher?

OC stands for overfill condition. The water level sensor or float switch detected that water exceeded the safe maximum level inside the tub.

Can I clear OC by resetting the dishwasher?

Yes, but the code will return if the cause is not fixed. Hold Start/Cancel for 3 seconds to clear, then repair the float switch or inlet valve before running another cycle.

Is OC the same as OE on Samsung dishwashers?

They are related but can appear on different model variants. Both indicate an overfill or overflow condition. OE is more common on certain older Samsung models while OC appears on newer ones. The diagnosis and parts are the same.

Related Samsung Dishwasher Error Codes

Code: OESamsung Dishwasher OE Error Code: Overflow Detected Code: LCSamsung Dishwasher LC Error Code: Leak Sensor Triggered Code: 4CSamsung Dishwasher 4C Error Code: Water Supply Fault

Same Fix Works on These Brands

Samsung shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Samsung washerSamsung Washer 3C2 Error Code: Motor Stall Samsung washerSamsung Washer 3E Error Code: Motor Fault Samsung washerSamsung Washer 4C Error Code: No Water Supply Samsung washerSamsung Washer 4E Error Code: Water Supply Fault (Top Load)Samsung washerSamsung Washer 5C Error Code: Drain Error (Older Display)Samsung washerSamsung Washer 8C Error Code: Vibration Sensor Fault

Models Known to Experience OC Errors

This repair applies to most Samsung dishwashers with this error code. Common model numbers include:

DW80R9950US, DW80R2031US, DW80T5040US, DW80K5050US, DW80N6070US, DW80M9550US

Last verified for technical accuracy on March 14, 2026