ErrorCodeDoctor
LG Washing Machine (Front Load) SUD error code
The SUD code appears when your LG washing machine detects an excessive amount of soap foam inside the drum. The machine automatically adds a suds-reduction cycle to break down the foam before continuing, which can add up to 2 hours to the total cycle time. If the suds are detected during the spin cycle the machine will pause to prevent water from leaking out. This is not a mechanical fault — it is almost always caused by using too much detergent or the wrong type.
Common causes
- Too much detergent added for the load size
- Using regular detergent instead of HE detergent in an HE machine
- Detergent residue built up inside the drum from previous washes
- Soft water conditions that cause detergent to foam more than usual
How to fix it
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1
Do not open the machine — let it complete the automatic suds reduction cycle
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2
Once the cycle finishes run an empty rinse cycle to clear remaining soap residue
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3
Reduce the amount of detergent you use in future washes
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4
Switch to HE detergent if you are not already using it
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5
Run a Tub Clean cycle to remove any detergent buildup inside the drum
Related LG Washing Machine (Front Load) error codes
OE
The washer cannot drain the water out of the drum
IE
The washer did not fill with enough water within the expected time
UE
The laundry inside the drum is unevenly distributed and the washer cannot spin properly
CL
Child lock is active — the control panel is locked and cannot be adjusted