The nF error code on a Samsung washer means that the washer is not filling with water (nF = no fill). If you get an nF error code, the first thing to do is shut off the power to the washing machine. Samsung washers have been known to have glitches in which the washer displays false error codes. Turning the power off and on will clear the false error code. If the nF error code returns, follow the following steps to identify and fix the problem.
This guide applies to the following Samsung models:
1. Check that the Water Is On
If the washer is showing an nF error code, check that the water supply to the washer is turned on. Make sure to check both the hot and cold water supply valves. The washer usually requires the water supply valves to be turned on all the way. Make sure the valves are fully open.
2. Clean Out the Debris Filter (Front-Loaders)
If your Samsung washer has a debris filter, cleaning out the filter may resolve the nF error code. Open the debris filter access cover and locate the black rubber drain hose. Remove the white drain plug from the hose, and drain the water into a large container. Then remove the debris filter by turning it clockwise and pulling it out. Clean the filter with soap and water and return it to the washer.
3. Check the Door or Lid
Some Samsung washers will not fill with water if the door is not properly closed. The door switch (front-loaders) or lid switch (top-loaders) tells the control panel or timer to fill the washer once the door is closed correctly. If the door is not closing properly, the door lock assembly will likely need to be replaced.
If the door does close properly, there may still be a fault with the door or lid switch, as it could be falsely telling the control board or timer that the door is not closed. The door or lid switch can be tested with a multimeter for continuity (a continuous electrical path) to determine if it needs to be replaced.
4. Check the Water Inlet Hoses
Occasionally, water supply hoses become kinked or crimped and cause the nF error code. The washing machine may have been pushed too close to the wall to cause the problem. Straighten out the hose if it is restricting the water supply to the washer.
5. Clean the Water Inlet Filters
Most Samsung washers will have filters where the water inlet hoses connect to the washer. If the filters are clogged, it could cause the nF error. To check the water inlet filters, turn off the water and disconnect the inlet hoses from the washer. Locate the filters and check if they are clogged. Depending on the model, you may be able to use needle-nose pliers to remove the filter. Wash the filters with water, using a brush to clean them.
6. Check that the Washer Is Receiving Water from Both Entry Points
For the washer to work correctly, it requires water from the two entry points (usually marked hot and cold). Even if you use the washer with only cold water, the hot entry point still requires water to be feeding into it. The washer may be getting enough water to wash the clothes, but because both entry points are not receiving water, the washer displays the nF error code. To solve this issue, a splitter, which splits the water through both entry points, should be attached to the washing machine and inlet hose.
7. Check the Water Pressure
Samsung washers require water pressure between 30 and 120 psi. If the water pressure is below 30 psi, the washer will not receive enough water, which causes the nF error code. The water pressure can be checked by turning off the water and removing the water inlet hoses. Place the water inlet hoses over an empty bucket and turn the water on. There should be a strong and constant flow of water.
8. Check the Water Inlet Valve
If you check off the above causes of the nF error code, the water inlet valve may have a defective solenoid. When the washer begins a wash cycle, voltage is sent to the water inlet valve, which opens to allow water to fill the tub. Over time the solenoid coils inside the inlet valve may fail. The solenoids can be checked with a multimeter for continuity (a continuous electrical path). If a coil tests negative for continuity, the water inlet valve will need to be replaced.
Access to the water inlet valve will depend on the washer model. On front-loader washers, the inlet valve can be accessed by removing the top of the washer. The top can be lifted off once screws at the back of the washer have been removed. With top-loader washers, the control panel will need to be removed and the washer cabinet lifted off. Make sure to disconnect the power and turn off the water before accessing the washing machine.
9. Check the Water Level Switch
The water level switch inside the washer is a pressure-activated switch that determines when the tub needs to stop filling with water. The switch has two sets of contacts. One contact sends power to the water inlet valve, which causes the tub to fill. Once the tub has filled, the second contact sends power to the motor, and the wash cycle begins. If the switch becomes defective, the washer may not fill completely or at all.
The switch can be tested with a multimeter to determine if it has continuity. If the switch does not have continuity, it will need to be replaced. On top-loader washers, the switch is usually located behind the water level control knob inside the control panel. On front-loader washers, the switch is usually located just under the top panel, mounted to the washer cabinet.