For the Samsung Washer families covered by the source set, **nF** means **water supply / fill error**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. Samsung appliances monitor whether a function reaches an expected state within a certain sequence. When that check fails, the control can store or display a code even though the root cause may sit elsewhere in the same circuit. The recorded display form is **nF**. Search normalization stores it as **NF** while preserving the characters a homeowner actually sees.
Reviewed by Ethan Mercer · Last reviewed August 17, 2026
Written by
Ethan Mercer Appliance Repair Content SpecialistPublished August 17, 2026Updated August 22, 2026Technically reviewed August 17, 2026
Content status:
Verified
Error codeNF
ApplianceWasher
Quick answer
Water supply / fill error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so NF may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
For the Samsung Washer families covered by the source set, **nF** means **water supply / fill error**. The first useful step is to preserve the exact characters and model number before power cycling the appliance. Samsung appliances monitor whether a function reaches an expected state within a certain sequence. When that check fails, the control can store or display a code even though the root cause may sit elsewhere in the same circuit. The recorded display form is **nF**. Search normalization stores it as **NF** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
One clue that supports the nF diagnosis is that the appliance may receive too little water or fail to confirm the expected water level.
On affected Samsung washing machine models, the code often appears near the beginning of a fill stage.
The nF display becomes more meaningful if water can enter slowly, intermittently, or not at all.
On affected Samsung washing machine models, nF appears during the washer stage associated with water supply / fill error.
nF can be accompanied by this pattern: the cycle may pause, stop, retry, drain, or refuse to advance until the condition is cleared.
Why it happens
Possible causes
varies by model/region — cross-region baseline — Water supply / fill error
Before you call
Safe checks you can make
These are simple, non-hazardous checks only. If anything is unclear, stop and contact a technician.
To rule out an accessible cause, confirm the household water supply valve is fully open where the appliance uses one.
With nF recorded, check accessible supply hoses for kinks and clean inlet screens only as described by Samsung.
The next non-invasive check is to check whether water actually enters before the code appears.
With nF recorded, verify hot/cold hose routing and water pressure when relevant to the exact appliance.
For nF, start by doing this: record the code and the cycle stage where it appears.
As an external check for nF, verify owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
Important safety warning. Safety takes priority over clearing nF. Disconnect power and stop use for active leakage near electrical parts, smoke, burning smell, or repeated breaker trips.
Get help
When to request repair service
If supply flow is proven good and the display returns, inlet valves, flow/level sensing, wiring, or control electronics may require diagnosis. If nF keeps returning, record the stage at which it reappears so the technician can test the water supply / fill error path instead of replacing parts by guesswork.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
One controlled restart is reasonable after correcting an obvious external issue. A recurring **nF** display should be treated as diagnostic evidence, not as a reason to keep rebooting the appliance.
Short owner-accessible checks may be reasonable when the appliance is safe. Persistent **nF**, worsening performance, or any electrical/water/heat hazard is a reason to stop use.
Treat **nF** as a starting point, not a replacement instruction. Wiring, feedback signals, operating conditions, and electronic controls can mimic a failed component.
The same-looking code can be reused on another Samsung appliance family or reformatted by region/model year. Match the appliance type and exact model before applying a meaning. This page therefore keeps **Washer nF** separate from same-looking codes used by other Samsung appliance families.