Samsung Washer Error Code S2 — What It Means & How to Fix It

What Does This Error Mean?

The S2 error means your Samsung washer has detected an overflow condition — there is more water in the drum than there should be. The machine immediately stops as a safety measure to prevent flooding your laundry room. This is a serious error that should not be ignored. Do not restart the washer until you find out why too much water entered the drum.

Affected Models

WF45R6100AW
WF50R8500AV
WF45T6000AW
WF56H9100AG
Most Samsung front-load washers with overflow protection

Common Causes

Water inlet valve is stuck open and continues letting water in after the correct level is reached
The pressure sensor (water level sensor) has failed and is giving incorrect readings to the control board
Too much detergent was used, creating excessive suds that raise the perceived water level
Drain hose siphoning — positioned too low, allowing water to continuously siphon in from the drain
Control board malfunction sending incorrect signals to the inlet valve

How to Fix It

Turn off the washer immediately. Then turn off both water supply valves at the wall behind the machine.

Stopping the water supply prevents any more water from entering while you investigate.
Unplug the washer from the power outlet. Leave it unplugged for at least 5 minutes before attempting a restart.

This gives the control board a full reset. With the power off, reconnect the supply valves, then plug back in.
Check the drain hose position. The end of the hose should sit no lower than 24 inches (60 cm) above the floor when inserted into the standpipe.

A hose that hangs too low creates a siphon effect that can continuously pull water through the machine.
Make sure you are using HE (High Efficiency) detergent, and only the recommended amount.

Standard detergent creates far too many suds in a front-load washer. Excess suds can trigger overflow and water level errors.
If the error returns, the water inlet valve is the most likely culprit. With the washer off and unplugged, turn on the water supply — if water still flows into the drum, the valve is stuck open and must be replaced.

A stuck-open inlet valve is a definite sign you need a technician. Do not run the washer in this condition.

When to Call a Professional

S2 errors caused by a stuck inlet valve or failed pressure sensor require a technician. Do not keep running the washer — an active overflow condition can cause water damage to your home. Inlet valve replacement costs $100–$180. Pressure sensor replacement runs $80–$160. Turn off the water supply valves behind the washer while you wait for service.

Frequently Asked Questions

How do I know if my water inlet valve is stuck open?

The test is simple. With the washer off and unplugged, turn on the water supply valves. Then watch inside the drum. If water starts flowing in while the machine has no power, the valve is stuck open. Turn the supply off immediately and call a technician.

Can too much detergent really cause the S2 error?

Yes — it is more common than people think. Excessive suds from the wrong type of detergent can fool the water level sensor. The sensor reads the pressure in the drum, and a thick layer of foam raises the pressure just like actual water would. Always use HE detergent marked with the HE symbol, and use the smallest recommended amount.

Is S2 the same as the FE error on Samsung washers?

They describe the same condition — too much water in the drum. FE (Fill Error / Overflow Error) is the code used on most modern Samsung models. S2 appears on some older Samsung models. The troubleshooting steps are identical.