Samsung Washer OC Error Code: What It Means and How to Fix It
Updated · from manufacturer service documentation
The OC code on a Samsung washer means Overflow Check — water keeps being supplied continuously because the water level detection isn't working correctly. Per the service documentation, this is most often the water level sensor itself, though a clogged drain hose or a supply-valve problem can produce the same symptom.
What Causes the OC Code
| Cause | Likelihood | DIY difficulty | Related part |
|---|---|---|---|
| Water level sensor degraded or defective | Most common | Moderate — sensor check/replace | Water level sensor |
| Water level sensor terminal out of place | Common | Easy — reseat terminal | Water level sensor terminal |
| Drain hose clogged, causing a pressure injection check issue | Less common | Easy — clear drain hose | Drain hose |
| Water supply valve frozen or containing foreign material | Less common | Easy — thaw / clean valve | Water supply valve |
How to Fix the OC Error, Step by Step
-
Check the water level sensor terminal
Per the service documentation, OC can occur simply because the sensor's terminal is out of place — reseat it before assuming the sensor itself has failed.
-
Check the drain hose for clogs
A clogged hose can create a narrow-point pressure issue that prevents the water level detection from working, causing water to keep being supplied.
-
Check the water supply valve for freezing or debris
Continuous water supply can also stem from a frozen valve (in winter) or foreign material lodged inside it rather than the sensor itself.
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Replace the water level sensor if it tests degraded or defective
This is the documented fix once the terminal, drain hose, and valve have all been ruled out.
Which Models This Applies To
Documented for the Samsung top-load series WA48H7400AW, WA48J7700AW, WA48J7770AP/AW. OC is specifically about the water level sensor failing to detect that the target fill level was reached — distinct from 4C (no water reaching the machine at all) and 5C (drainage failure).
See also: Samsung washer 4C · Samsung washer 5C. Full list: all Samsung washer error codes.
Frequently Asked Questions
What does OC mean on a Samsung washer?
Overflow Check — the machine keeps supplying water because the water level detection isn't registering that the target level has been reached.
Is OC the same problem as 4C?
No — 4C means no water is reaching the washer at all, while OC means water keeps coming in because the level sensor isn't detecting when to stop.
Could a clogged drain hose really cause an overflow-detection issue?
Yes — a clog creates a narrow-section pressure issue that interferes with the water level detection, causing the same continuous-supply symptom as a failed sensor.
Do I always need to replace the sensor for OC?
Not always — check the sensor terminal position, the drain hose, and the supply valve for freezing or debris first. Sensor replacement is the fix only once those simpler causes are ruled out.
Based on the Samsung service documentation for the WA48J7700AW washer series. Last updated: .