The OF error on your Samsung Washer means the machine has detected an overflow of water in the tub. Turn off the water supply and power to the washer right away, then check the steps below before running another cycle.

Error code OF
Meaning Overflow — the washer has sensed more water in the tub than it should, or water is running continuously
Severity High — can cause water damage to your home if not addressed quickly
Time to fix 15–40 minutes
Tools needed Towels, adjustable pliers, flashlight

What the OF error means

The OF code is a safety alert built into Samsung washers to stop flooding. It’s triggered when the water level sensor (pressure switch) detects that the tub has too much water, or when the machine senses water flowing in when it shouldn’t be. As soon as this happens, the washer will usually stop the cycle and may attempt to drain automatically.

This is different from drain-related faults like the one covered in Samsung Washer DE Error Code: Causes and Fixes, since OF is specifically about too much water entering or staying in the tub rather than a door or drain issue.

Common causes

  • A stuck or faulty water inlet valve that keeps letting water in even when the cycle calls for it to stop
  • A faulty pressure switch (water level sensor) sending incorrect readings to the control board
  • Too much detergent or the wrong type of detergent causing excess suds, which some models misread as overflow
  • A blocked or kinked drain hose that stops water from leaving fast enough
  • A damaged or dislodged pressure switch hose (the small tube that measures water level)
  • A control board fault, though this is less common than mechanical causes

How to fix the OF error

  1. Cut the power and water supply — Unplug the washer or switch off the breaker, then turn off the water taps behind the machine to stop any further water intake.
  2. Mop up standing water — Use towels to soak up any water around the washer and check the floor and nearby walls for damage.
  3. Inspect the water inlet valve — Check that it closes fully when the washer is off. If water keeps dripping through after the supply is off at the valve itself, the valve may need replacing.
  4. Check the pressure switch and its hose — Locate the small hose connecting the tub to the pressure switch, usually near the top of the tub. Look for cracks, disconnections, or kinks and reseat or replace as needed.
  5. Reduce detergent use — If you’ve been using too much detergent or a non-HE product in an HE machine, switch to the recommended amount and type to prevent excess suds triggering the sensor.
  6. Restart and monitor — Restore power and water, run a short rinse cycle, and watch closely to see if the OF code returns. If it does, the pressure switch or valve likely needs professional replacement.

FAQ

Is it safe to keep using the washer if I see the OF error?
No. Stop the cycle, turn off the water supply, and check for leaks before running the machine again to avoid water damage.

Can too much detergent really cause an OF error?
Yes. Excess suds can be misread as overflow by the sensor on some Samsung models, so always use the recommended amount of HE detergent.

Do I need a technician to fix this?
Not always. Checking hoses and valves yourself can resolve it, but if the pressure switch or control board is faulty, a technician will need to replace the part.