Samsung Washer SUD Error Code? Here’s Why

Seeing Samsung’s SUD error code on your washing machine can be pretty frustrating. Leaving you wondering what’s gone wrong and how you’re going to go about fixing it!

Take a deep breath…, as I explain the common causes behind the SUD error code, and provide you with practical troubleshooting steps to get your machine back in working order.

What Does The Samsung SUD Error Code Mean

Samsung’s SUD error code shows that your machine has identified an excessive amount of suds in the washing machine drum. While suds are required to assist in cleaning your laundry, an excessive amount can lead to problems with the machine’s performance. Resulting in subpar cleaning and potentially damaging the washer.

Is the SUD error code the same as 5UD

In short yes, the SUD error code is calling out the same problem as the 5UD error codes. The 5 is just confused with the letter S on the LCD control panel. The 5D, SD, SUD5, and 5UDS are all effectively the same error codes across various Samsung model LCD panels.

What Causes the SUD Error Code?

According to Samsung, there are three common reasons why the SUD error code appears on your machine’s control panel. Too much detergent, using the wrong detergent, or a buildup of residual suds.

In our experience, there are a couple of additional mechanical causes, that we cover as part of the troubleshooting guide later in the article. First, let’s address Samsungs explanation of what triggered the SUD code.

1. Too Much Detergent

Possibly the most common cause of the SUD error code is using an excessive amount of detergent in a single wash cycle. The use of too much detergent generates excessive suds, which can impede the washing process and lead to the SUD error code. Your washing machine will identify this issue through one of its onboard sensors, usually the foam level sensor.

2. Using the Wrong Detergent Type

High-efficiency (HE) washing machines, like Samsung washers, require low-sudsing HE detergent to function efficiently. Using a non-HE detergent can produce a disproportionate amount of suds, causing the SUD error code.

3. Build-Up of Sud Residue

Lastly, a build-up of detergent or suds residue inside the drum or other washer components can also trigger the SUD error code. This residue accumulation can result from improper maintenance or continuous use of excessive detergent.

samsung sud error code 800pxl

How to Fix A Samsung SUD Error Code

Okay, so now we get the basic appreciation that the SUD error code is relatively benign, without implying any serious mechanical failures. So I will now take you through a step-by-step troubleshooting guide allowing you to diagnose the root cause and take remedial action. This process is designed to check the most likely cause of the SUD error code first and work towards the least likely and most complex cause to fix.

Remove Detergent Residue

First, remove any detergent residue within the machine by running an empty wash cycle on the hottest water setting, DO NOT ADD ANY DETERGENT. This will dissolve and flush out any residual detergent or suds from the washer’s drum or other component parts.

  1. Ensure the washer is empty and contains no laundry items.
  2. Select the hottest water setting available on your washing machine and choose the highest spin speed and the longest cycle possible.
  3. Optionally, you could add a washing machine cleaning solution or use a natural cleaning solution. For example; a cup of white vinegar or a mixture of baking soda and water.
  4. Start the wash cycle and let it run until it’s complete. The hot water, combined with the cleaning agent, will help dissolve and remove any detergent residue within the machine.
  5. After the cycle has finished, use a clean, damp cloth to wipe down the inside of the drum to remove any remaining detergent residue.
  6. Leave the door open for several hours to allow the washer interior to air dry.

If the SUD error code is still present on the control panel move to the next step, cleaning the drain pump filter.

Clean the Drain Pump Filter

Next, inspect and clean the drain pump filter. With use, the filter can clog with detergent residue, lint, or other debris flushed out during a wash cycle. You will need to locate the filter on the bottom of the washer, typically it’s behind a small access door. Remove the filter, clean it thoroughly, and reinstall it to ensure proper water flow and drainage during the wash cycle. Here’s a step-by-step guide:

  1. Disconnect the washing machine from the power source.
  2. Locate the drain pump filter, situated at the bottom front of the washer, behind the small access panel.
  3. Place a towel or shallow container under the filter panel to catch any excess water that spills during the cleaning process.
  4. Open the access door or panel to reveal the drain pump filter.
  5. Turn the filter counterclockwise to unlock it, then remove it from its housing.
  6. Rinse the filter under running water, and use a soft brush to remove any debris or lint. It may be necessary to soak the filter in warm, soapy water for a few minutes to loosen stubborn grime.
  7. Place the clean filter back into its housing, turning it clockwise and locking it into position.
  8. Close the access door or panel, ensuring it is securely in place.
  9. Reconnect the washing machine to the power source and check for the SUD error code.

Here’s a short video to walk you through the process.

Samsung washing machine "SUD" error code - EASY FIX!

If the error code is still present move on to the next step, inspecting the drain hose.

Inspect the Drain Hose for Kinks or Clogs

Next, you will need to examine the drain hose, looking for any kinks or clogs. Any blockage or obstruction will restrict the flow of water and detergent during the wash cycle. So the hose will need to be cleared or kinks removed. Here’s a step-by-step guide:

  1. Disconnect the washing machine from the power source. Pull the washer away from the wall to allow for rear access.
  2. Locate the drain hose at the rear of the washer. It’s typically a grey or white flexible hose that connects the washer to the drain or a standpipe.
  3. Give the hose a visual inspection looking for any kinks, twists, or bends. Gently straighten any kinks to allow good water flow during the wash cycle.
  4. Remove the drain hose from the washer, and also disconnect it from the drain or standpipe by loosening the hose clamp. Carefully pull the hose off, but watch out for dripping water trapped within the hose.
  5. Check the interior of the drain hose for any clogs or obstructions. Use a flashlight to check inside. If necessary, use a long, flexible brush or a straightened coat hanger to gently dislodge any blockages.
  6. If you see anything, flush the drain hose with water from a garden hose or faucet to remove the debris.
  7. Reconnect the drain hose to the washer and the drain or standpipe, ensuring a secure fit. Tighten the hose clamp to ensure you have a water-tight connection.
  8. Reconnect the washing machine to the power source. With the drain hose free of kinks and clogs, your washer should now function properly.

If you still have the SUD error code it’s time to inspect the foam level sensor.

Inspect the Foam Level Sensor

The foam level sensor is responsible for measuring the level of suds within the washing machine. You will need to inspect the sensor to ensure it is clean and functioning properly. If necessary, clean the sensor using a soft brush and a mixture of warm water and mild detergent. Here’s a guide to help you inspect and clean the sensor:

  1. Before starting, disconnect the washing machine from the power source to ensure safety during the inspection process.
  2. Find the foam level sensor in your washer. Typically, it is located on the side or bottom of the washer tub, or it may be attached to the detergent dispenser assembly. Refer to your washer’s manual for the exact location, if necessary.
  3. To access the foam level sensor, you may need to remove the washer’s top or back panel. Unscrew or unclip the panel as needed, and gently lift it off. Then, disconnect any wiring or hoses connected to the sensor, and carefully remove the sensor from its mounting position.
  4. Visually inspect the foam level sensor for any signs of damage, dirt, or detergent residue. If the sensor appears dirty, continue to the next step to clean it. If it appears damaged, consider replacing the sensor.
  5. Using a soft brush and a mixture of warm water and mild detergent, gently clean the foam level sensor to remove any dirt or residue. Rinse the sensor with clean water and allow it to dry completely before reinstalling.
  6. Reattach the foam level sensor to its mounting position, and reconnect any wiring or hoses. Ensure the sensor is securely in place.
  7. Reposition the washer’s top or back panel, and secure it with the screws or clips that were removed earlier.
  8. Reconnect the washing machine to the power source. With the foam level sensor inspected and cleaned, your washer should now function properly.

When to Call an Appliance Repair Technician

If you’ve attempted the above troubleshooting steps and the SUD error code persists, it may be time to contact a professional appliance repair technician. A trained technician can diagnose the underlying issue and provide expert assistance, saving you time and preventing further damage to your washing machine.

Preventing The SUD Error Code

Once you have your washing machine up and running, it’s time to take some preventative action. Follow these simple tips to avoid the SUD error code becoming a reoccurring problem.

Use the Correct Amount of Detergent

Use the recommended amount of detergent for your specific washer model and load size. The overusing detergent will lead to excessive suds and as you have experienced, the unwelcome SUD error code.

Keep The Drum and Detergent Dispenser Clean

Perform regular cleaning and basic maintenance of your washer’s drum, as well as the detergent dispenser.

  • Clean the drum by running an empty hot water cycle with a washing machine cleaner or a mixture of baking soda and vinegar.
  • Ensure the detergent dispenser is free of residue, by removing and cleaning it thoroughly. This will help minimize the build-up of detergent or suds residue, reducing the risk of the SUD error code.

Check Drain Filter and Hoses Periodically

Inspect the drain filter and drain hoses on a regular basis to make sure they remain free from obstruction. Clean the drain filter at least once a month and check for hose kinks, clogs, or damage.

Verdict: Samsung Washer SUD Error Code

The Samsung Washer SUD error code, often referred to as 5UD, 5D, or 5S error codes, is a consequence of excessive suds within the washing machine drum. This can stem from using too much detergent, or even the wrong type of detergent. Or it could be the result of detergent residue.

To fix the SUD error code, clean any detergent residue, inspect the drain pump filter, and drain hose, and examine the foam level sensor.


Samsung – What does the “SUDS” error mean

Appliance Service Technician | Website | + posts

Andy has over 8 years of experience working on residential household appliances, performing diagnostics, and repairs across most major brands. He graduated from the Denver Institute of Technology, is NASTeC certified, and has worked for Mr. Appliance. Andy has contributed to features on major publications including Better Home & Gardens, Family Handyman, and