Seeing **nF1** on a Samsung washing machine narrows the problem to **water temperature / hot-cold supply error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. The exact stage when the code appears can be as important as the characters themselves. Note whether it happens at startup, during fill, heating, cooling, draining, spinning, drying, or after a power event. The recorded display form is **nF1**. Search normalization stores it as **NF1** 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 codeNF1
ApplianceWasher
Quick answer
Water temperature / hot-cold supply error.
Model compatibility: Samsung can reuse or reformat codes across series and model years, so NF1 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
Seeing **nF1** on a Samsung washing machine narrows the problem to **water temperature / hot-cold supply error**. What you do next depends on whether the code is an issue, a normal status/test message, or a model-dependent interpretation. The exact stage when the code appears can be as important as the characters themselves. Note whether it happens at startup, during fill, heating, cooling, draining, spinning, drying, or after a power event. The recorded display form is **nF1**. Search normalization stores it as **NF1** while preserving the characters a homeowner actually sees.
Signs
Symptoms you may notice
Depending on the exact model, the appliance may stop or limit the affected function when the code is detected.
A symptom that fits nF1 is that the same code can return at a repeatable stage of operation.
A symptom that fits nF1 is that other symptoms depend on the model and the subsystem named by Samsung.
Depending on the exact model, nF1 appears during the washer stage associated with water temperature / hot-cold supply error.
Depending on the exact model, 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 temperature / hot-cold supply 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.
Before opening any service area, record the exact code, model number, and operating stage before resetting power.
Before requesting service for nF1, complete only the owner-accessible checks described in the model manual.
Before requesting service for nF1, do not replace parts solely from a display code when wiring, conditions, or control feedback can create the same result.
Before opening any service area, record the code and the cycle stage where it appears.
Before opening any service area, check owner-accessible water supply, drain hose/filter, load balance, door, detergent, or power only when relevant.
To rule out an accessible cause, power-cycle once only where Samsung's guidance recommends it; if the same code returns, move to model-specific diagnosis.
Important safety warning. Disconnect power and stop use for active leakage near electrical parts, smoke, burning smell, or repeated breaker trips. If resolving nF1 would require energized internal access, that is the point to hand the diagnosis to a qualified technician.
Get help
When to request repair service
If the owner-accessible checks do not clear nF1, If the code returns after the documented basic checks, request model-specific diagnosis of the affected subsystem. The repair should confirm the monitored function and its feedback before any board or component is condemned.
Book your repair
Seeing this code on your Samsung appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You can try the one reset Samsung documents for the model, but **nF1** returning afterward means the condition still exists. Note the operating stage instead of cycling power repeatedly.
That depends on the accompanying symptom. A code with no safety hazard may allow a short diagnostic check, but **nF1** should not be ignored if performance is deteriorating or the display keeps returning.
Not automatically. Samsung error codes are diagnostic indicators, not part numbers. Confirm the circuit around **nF1** before replacing anything.
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 nF1** separate from same-looking codes used by other Samsung appliance families.
