LG Washing Machine Error Code SUD
Excess suds detected — too much foam in the tub
The washer sensed excessive foam and paused to run extra rinses and a foam-reduction routine before continuing. Too much detergent, non-HE detergent, or soft-water over-sudsing is almost always the cause — the foam interferes with draining and spin and can leak from the door.
What Does Error Code SUD Mean on a LG Washing Machine?
Excess suds detected — too much foam in the tub.
The washer sensed excessive foam and paused to run extra rinses and a foam-reduction routine before continuing. Too much detergent, non-HE detergent, or soft-water over-sudsing is almost always the cause — the foam interferes with draining and spin and can leak from the door.
What Causes Error Code SUD?
Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:
- 1 Too much detergent 45% of cases
- 2 Non-HE detergent used 35% of cases
- 3 Soft water amplifying suds 15% of cases
- 4 Drain restriction trapping foam 5% of cases
How to Fix LG Washing Machine Error Code SUD
- 1
Let the cycle run
The washer will add rinses to clear the foam — this can take 30+ minutes. Don't interrupt it.
- 2
Use less HE detergent
Switch to HE detergent and use only 1–2 teaspoons for a normal load. Most people use far too much.
🔩 HE detergent - 3
Run a Tub Clean / rinse cycle
Run an empty Tub Clean cycle to flush residual detergent from the system.
How to Reset Error Code SUD
Wait for the suds-reduction routine to finish, then restart. Reduce detergent next load.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
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Thanks for letting us know. If the steps above didn't work, see when to call a professional.
When to Call a Professional
SUD is almost never a hardware fault. Call a pro only if it appears with correct HE detergent and a clear drain.
Related Error Codes
Same Code on Other Brands
Error code SUD appears on these other brands too. See every brand that shows SUD →
Find Replacement Parts
Use these links to find the exact replacement parts for your LG Washing Machine:
External links — ApplianceErrors.com is not affiliated with these retailers.
More LG Washing Machine Error Codes
Frequently Asked Questions
What does error code SUD mean on a LG Washing Machine? +
How do I fix error code SUD on my LG Washing Machine? +
How do I clear or reset error code SUD? +
Is error code SUD serious? +
Sources & References
- • LG Support — Help Library — official manufacturer documentation
- • Our editorial & verification policy
Content verified against manufacturer service documentation. Last verified: June 14, 2026.