Washer Sud or SD Error – What It Means and How to Fix This Fault Code

Washer Sud or SD Error – What It Means and How to Fix This Fault Code If you receive a “Sud” error, or “SD” fault code on your washer’s display, it means that there are far too many suds in your washer than what the machine can remove through a normal rinse cycle. This error can appear on a Samsung HE washer, Kenmore, Whirlpool washer or other brand of washer. This error usually happens due to one of the following reasons listed below.  

Too much detergent

Simply put, too much detergent was used and an excessive amount of suds or foam was produced. Adding an additional rinse cycle without adding any more detergent might fix this problem. Sometimes the machine will automatically detects this problem and add a pause and additional rinse cycle in order to break up the suds. Several pauses and rinse cycles might be added in order to completely remove the excessive suds.

If you know you are using the proper amount and type of detergent for your washer, your machine might be due for a good cleaning. Run the washer through a cleaning cycle to remove any residual detergent that might have built up in the washer.

Wrong type of detergent

High-Efficiency washers need to use specially-formulated HE detergent. HE detergents are specially formulated to be low-sudsing and work with a smaller amount of water. If you are using HE Detergent, be sure to follow the recommended usage amounts on the packaging. Watch for wording like “concentrated”

Clothing between the outer and inner baskets

Sometimes a laundry item like a sock, small towel or pillow case becomes lodged in between the inner and outer tubs which can cause this error code.

Clog in the pump or drain line

Check the drain pump and drain hose for clogs and kinks to the drain hose.

Failing Basket Drive Hub

Washer Drive Hub Detail

If your washer displays an SD error and will not go into the spin cycle, then the basket drive hub might need replacing. The whole tub should spin along with the impeller. If you can rotate the impeller while holding the inside tub still with your hand, then this might indicate that your drive hub needs replacing.


Over time, the splines or fins on the inside part of the hub can wear down from use.  This part can be replaced by removing the impeller cover and nut that holds the impeller in place. Remove the impeller and take out the screws that hold the top part of the hub in place. Remove the bottom piece of the hub that connects with the shaft. Replace both parts and install the screws, impeller, nut and cover to finish the repair.


2 thoughts on “Washer Sud or SD Error – What It Means and How to Fix This Fault Code

  1. SUD or SD

    The control unit senses a suds lock condition by analyzing the current draw on the drive motor. If “Sud” is displayed a potential suds lock is detected. This may signify a bad pump, an extra heavy load, excessive detergent, or excessive suds.

    • If too much detergent was used, run the unit through a Rinse/ Spin cycle then a Normal cycle without adding any detergent. This should clear the unit of the excess detergent.

    • Check the drain hose and make sure it is not plugged or kinked

    • Check Wire Harness connections to the Drain Pump, Pressure Switch, and Central Control Unit (CCU)

    • Check/ Clean Drain Pump Filter of foreign objects

    • Check Drain Pump

    • Check the Pressure Switch

    • Check CCU

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