Samsung Washer Error Code nF1

The nF1 code on a Samsung washer signals a water supply error. The washer is not filling with water at the expected rate or volume. Causes include a clogged water supply valve, a disconnected wiring terminal, swapped supply connectors, or a loose PCB terminal connection.

A reset may clear the code temporarily, but the error will return if the underlying cause is not corrected. The control system will trigger nF1 again as soon as it detects inadequate water fill in the next cycle. Address the root cause, such as cleaning the valve filter or reseating connectors, before relying on a reset.

If the fix is simply cleaning the inlet filter or reseating a connector, the repair may cost little to nothing beyond your time. If the water supply valve solenoid has failed and needs replacement, parts and labor can range from around 80 to 200 dollars depending on your location and whether you hire a technician. DIY valve replacement is a moderate-difficulty repair for those comfortable working with appliance wiring and water connections.

Start by checking the inlet filter screen and valve diaphragm for debris and clean them if needed. Then test the water supply valve resistance, which should read between 0.9 kΩ and 1.2 kΩ across the terminals. Also verify that all wiring connectors at the valve and PCB are fully seated and that the warm water and rinse hose connectors are connected to the correct ports. If the valve fails the resistance test, it will need to be replaced.

The washer will typically stop or refuse to complete a cycle when nF1 is active, which protects the machine from running without adequate water. It is best not to force or bypass the cycle since running the motor and drum without proper water fill can stress components. Diagnose and resolve the error before resuming normal use.