How to Fix the nF Error Code on a Samsung Washer

Fred's Appliance
April 9, 2024
Washer Repair

When the nF error code, which stands for ‘No Fill,’ is displayed, it indicates that your Samsung washer is not filling with water correctly. This could mean that it is receiving some water, but not enough to run a cycle, or it could mean that your washer is not receiving any water at all.

There are a number of potential causes of this problem, with the most common being an issue with the water supply hoses. Below, we will run through the most likely culprits causing the nF error on your washer and provide step-by-step instructions for fixing it.

Clean the Mesh Filter Screens

The mesh filter screens sit at the ends of the water supply hoses and stop debris from entering your washer. However, over time, they can become clogged, hindering the water supply to your washer, and triggering the nF error code.  

If this is the case, cleaning them will resolve the problem. You can do this by taking the following steps:

  1. Shut off the water supply to your washer.
  2. Disconnect the water supply hoses from the washer.
  3. Remove the mesh filter screens from the washer’s inlets. 
  4. Clean the mesh filter screens with a soft brush and running water.
  5. Reinsert the mesh filter screens and reconnect the water supply hoses.

Ensure the Water Hoses Are Not Kinked and Are Properly Connected

If the water supply hoses are kinked, clogged, or not connected properly, the water supply will be interrupted, causing the nF error. To ensure they are functioning as they should be, pull your washer away from the wall and inspect the hoses.

Ensure the hoses have not been pinched or become kinked, and then check the hoses are connected securely to the washer’s water inlets and the water supply faucets on the wall. It’s important that both the hot and cold water supply hoses are connected, and that the hoses go to the correct corresponding hot and cold water inlets on the washer.

Finally, ensure the water supply faucets are turned on all the way so they’re fully open, otherwise the error will persist. 

Check the Drain Hose

If the drain hose is loose or not installed correctly, it can lead to siphoning, which means water will drain out of the washer as quickly as it fills. To ensure this isn’t happening, check the following:

  • Make sure the drain hose is inserted into the drainpipe.
  • Ensure the drain hose is not inserted more than 6 inches into the drainpipe.
  • Make sure the drain hose is secured so it doesn’t move around too much during a cycle.
  • Make sure there isn’t an airtight connection where the drain hose enters the drainpipe. A small gap is required for airflow.
  • Inspect the drain hose for kinks.

Try a Hard Reset

Sometimes, a hard reset can resolve the nF error on Samsung washers. That’s because it could be a temporary software glitch that is causing the error to appear. To perform a hard reset, simply unplug your washer, wait for 5 minutes, then plug it back in again and attempt to run a cycle.

Test the Water Inlet Valves

If one of the water inlet valves is faulty, it can cause the nF error code to appear, meaning that the water inlet valve will need replacing. However, testing them requires you to disassemble the washer, so call in a professional if you don’t feel comfortable doing this. Here are the steps to test them yourself:

  1. Unplug the washer and turn off the water supply.
  2. Pull your washer away from the wall, and remove its top or back panel using a screwdriver to access the water inlet valves.
  3. Locate the water inlet valves which will be located where the water supply hoses connect to the washer.
  4. Disconnect the water hoses and remove the electrical connectors from the hot and cold water inlet valves.
  5. Set your multimeter to ohms. Then, press one of the multimeter’s probes against one of the water inlet’s terminals, and the other probe against the other terminal.
  6. If the reading on your multimeter is between 500 and 1,500 ohms, the water inlet valve is good. If the reading says “OL,” the water inlet valve will need replacing.
  7. Repeat this process for each water inlet valve.
  8. It’s usually easy to purchase a replacement water inlet valve online, just ensure you find one that’s compatible with your model.
  9. To replace a faulty valve, remove the mounting screws or clips holding it in place. Then, insert the new valve in its place, refasten the mounting screws, and reconnect the electrical connectors and water hoses.
  10. Reassemble the washer and run a cycle.

Test the Pressure Switch 

The pressure switch monitors the water level in the washer. If it’s faulty, it may send an incorrect signal stating that the washer is not filling, causing the nF error. You can test it by:

  1. Unplugging the washer and turning off the water supply.
  2. Removing the top or back panel to access the pressure switch. It is usually located behind the control panel.
  3. Finding the pressure switch which looks like a small, round device with a hose attached to it. Search for an image online to help you identify it.
  4. Disconnecting the wires and tube from the pressure switch.
  5. Setting your multimeter to ohms. 
  6. Pressing one multimeter probe against one of the pressure switch’s terminals, and the other probe against the other. Then blow into or press inside the pressure switch.
  7. If this causes the reading to change, the switch is likely working. If it doesn’t change or has infinite resistance or “OL” on the display, it is faulty and will need replacing.

Still Having Trouble?

If after running all the troubleshooting steps above the nF error code is still displaying on your Samsung washer, it may be time to call in a professional to inspect and fix your appliance. That’s because there could be a more complicated issue, such as a problem with the control board, which is not something you can usually fix yourself.

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