How to fix an nF error on a Samsung washer

Seeing any error code on your Samsung washer can be a frustrating experience, but taking the time to understand what it means can help you fix it quickly. An error code flashing on your washer means the machine is trying to point you in the right direction with troubleshooting. 

The nF (“no fill”) error code typically indicates a water supply issue, which prevents the appliance from filling with water during the wash and rinse cycles.

If you need any replacement parts for your Samsung washer, you can enter your model number at AppliancePartsPros.com to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.

Let’s break down this error so you can get your washer spinning again!

Disclaimer: The error code information provided in this article is based on general service manuals and may not apply to your specific appliance model. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.

What causes the nF code?

The washer nF error code, also known as the “no fill” code, is a common alert that appears on a Samsung washing machine when it’s experiencing issues related to the water supply. This error code signifies that the washer isn’t filling with water to the point that its function is hindered.

This error can occur in both top- and front-loading Samsung washer models and may sometimes present itself alongside other codes like 4C, 4E, or NF1. 

It’s important to pay close attention when you see an nF error and work to fix it quickly. If the error is left unresolved, it could result in potential damage to internal washer parts. Running a wash cycle without proper water levels can strain and overheat the motors inside the machine.

The following can prevent the washer from filling up with water during the wash cycle:

• Low pressure in the pipeline network
• A damaged or clogged water inlet valve
• Blocked inlet hoses
• Malfunctioning temperature selector switch
• Damaged water level pressure switch
• Air dome tube leak or blockage
• Faulty lid switch

Safety precautions

When working on any appliance, remember to keep safety first. Here are some tips to keep in mind: 

• Always power off and unplug your appliance or switch off the circuit breaker before you attempt any maintenance or replacement work. This keeps you safe by preventing any risk of electric shock.
• Turn off the water supply at the outlet before beginning repairs. Keep towels ready to catch any residual water in the system when removing parts. 
• If the appliance has recently been used, give it plenty of time to cool down before working on it. 
• Take your time while working to prevent accidents and personal injuries. Rushing is the enemy of precision.
• Work in a well-lit area so you can clearly see and access appliance parts.
• Keep your workspace free of clutter and other obstacles. Keep children and pets away from the work area.
• Never work on internal parts with wet hands. Make sure the work area is completely dry.
• Check the user manual to see if there are specific installation or safety instructions related to your appliance or replacement part. 
• Be gentle when handling or removing parts. Excessive force might damage the appliance or cause personal injury.
• Wear insulated work gloves to protect your hands from sharp metal parts and debris.
• When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.
• Don’t test live voltage with a multimeter if you’re unfamiliar with how to prevent short-circuiting.
• Consider wearing safety glasses and/or a dust mask when working with chemicals, dust, or a large amount of debris to prevent irritation or injury.

How to troubleshoot the nF error

Follow these steps to clear the nF error from your Samsung washer.

Step 1 – Check the water supply and connections

1. Turn off the power supply to the washing machine.
2. Turn off the water supply to the washer.
3. Check that there are no kinks or damages in the inlet hoses.
4. Inspect the filter screen at each end of both fill hoses. Remove any debris.
5. Check for any leaks around electrical connections.
6. Unplug and re-plug all electrical connections related to water flow, including wire-connected sensors, pressure switches, temperature selector switches, and fill valves. 

Step 2 – Check the water inlet valve

LIVE VOLTAGE WARNING: For this test, the washer needs to be plugged in and powered on. Please be very careful to protect yourself from electric shock, which has the potential to cause serious injuries. Don’t ever test live voltage if you’re uncomfortable using a multimeter.

1. Make sure the washer is plugged in and turned on.
2. Find the water inlet valve at the back of your washer, where the hoses connect.
3. Carefully remove both hoses from the inlet valve. Take care to prevent damaging any threaded connections.
4. Set a multimeter to VAC, which looks like a sideways WiFi symbol.
5. Use the multimeter leads to check for 120 VAC when the washer calls for water.
6. Check the meter reading and listen for a beeping sound from your meter. 

If you don’t get 120 VAC, replace the valve assembly. 

If you get 120 VAC, clean any debris that may have accumulated in or around the water inlet valve. Check for debris or blockages in either of the water inlet valve solenoids or inlets and clean them thoroughly with water and a soft-bristled brush. If you notice any damage, replace them with new ones.

Step 3 – Check the water pressure switch

1. Make sure the washer is turned off and disconnected from the power supply.
2. Find the water pressure switch and remove its electrical connector.
3. Set your multimeter to measure resistance (Ω).
4. Use the multimeter leads to test across pins 6 and 7. 
5. The meter should read 22-24 ohms of resistance. If you don’t get the correct resistance, then you have a faulty switch that needs to be replaced. If you get resistance, reconnect the electrical connector and move on to the next step.

Step 4 – Inspect the wiring and connections

1. Make sure the washer is turned off and unplugged.
2. Open the panel on the back of your washing machine to access the wiring and connections.
3. Check all the wires connected to the water inlet valve’s solenoids, pressure sensor, lid switch, washer switch, selector switch, and control panel for any damage or disconnections. Look for any signs of burning or overheating at connection points or around control modules. If you find any, replace the wiring.
4. Set your multimeter to continuity.
5. Check each pair of related wires for continuity. Your meter should make a beeping sound if there’s continuity.

As a last resort, after all other troubleshooting methods have been exhausted, replace the control board to fix the nF error.

More information

Thank you for reading! We hope this guide helped you get your Samsung washer working again.

If you have any other appliance repair needs or projects, don’t hesitate to explore our other troubleshooting guides and videos. 

If you need replacement parts or some extra help with ordering them, grab your model number and head over to AppliancePartsPros.com, where you can chat with a pro, read our DIY blog and more. We can also help you troubleshoot common washer problems here.

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