- Appliances
- Washing machines
SUD
LG Sud on a washer: excessive suds
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
On an LG washer, Sud means too many suds. Use less detergent, do not exceed the maker's dose, use high-efficiency (HE) detergent and run the Tub Clean cycle.
Safety first
Stop and check this first
- Do not add more detergent to make up for a wash that comes out less clean: LG links Sud to overdosing, and extra foam can escape through the drawer or door.
Safe checks you can perform
- Detergent dose
- Detergent type
- Tub Clean cycle
Leave these tasks to a qualified professional
- Do not attempt this professional task: Drain and suds detection check
- Do not attempt this professional task: Test wash at the correct dose
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Drain and suds detection check
What they doIf Sud persists with the right dose and detergent, the technician checks the pump filter, the drain and the water level reading using LG's procedure.
They must show youthe condition of the filter and drain and the level test.
In writingwhat was found and any repair.
Test wash at the correct dose
What they doAfter the check, they run a wash with the recommended dose of HE detergent and confirm Sud does not appear.
They must show youthe wash finished without Sud.
In writingthe test and the dose used.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Detergent dose
- Who:
- you, no tools.
- How:
- compare the amount you use with the dose on the pack for your load and soil level. LG says not to exceed it.
- Result that matters:
- whether you were using too much.
- If you were using too much:
- lower the dose and try a wash.
- If the dose is right:
- check the detergent type.
- Evidence to keep:
- photo of the dose on the pack.
Evidence: LG USA front-load washer error code list
Detergent type
- Who:
- you.
- How:
- check on the pack that it is a high-efficiency (HE) washing machine detergent, as LG asks.
- Result that matters:
- whether the detergent is suitable.
- If it is not:
- switch to an HE one.
- If it is:
- move on to the Tub Clean cycle.
- Evidence to keep:
- photo of the pack.
Evidence: LG USA front-load washer error code list
Tub Clean cycle
- Who:
- you.
- How:
- with the drum empty, run Tub Clean with an oxygen-based cleaner, as LG says.
- Result that matters:
- whether Sud stops appearing on later washes.
- If it clears:
- there was built-up residue.
- If it persists with the right dose and detergent:
- ask service to check the drain.
- Evidence to keep:
- note of the washes where it appears.
Evidence: LG USA front-load washer error code list · [LG Front Loader] How to Clean the Tub
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Appliances
- Brand
- LG
- Product type
- Washing machines
Known code variants
- 5d
- 5UD
- 5Ud5
- code erreur SUD lave-linge Samsung
- codice SUD Samsung
- código SUD Samsung
- erreur SUD Samsung
- error SUD lavadora Samsung
- errore SUD lavatrice Samsung
- Fehlercode SUD Samsung
- lavadora LG exceso de espuma
- LG lavadora Sud
- LG Sud espuma
- LG Sud suds
- LG washer Sud
- LG washer too many suds
- S U d
- Samsung 5d
- Samsung 5UD
- Samsung 5Ud5
- Samsung Sd
- Samsung SUD
- Samsung SUdS
- Samsung Waschmaschine Fehler SUD
- Sd
- SUd
- SUdS
What it means
LG's front-load list defines Sud as excessive suds detected and gives four measures: less detergent, no more than the recommended dose, HE detergent and the Tub Clean cycle. Extra foam hinders spinning and draining, and the board stops or extends the programme to clear it. It is nearly always a matter of dose or detergent type; if it keeps appearing at the correct dose, there may be built-up residue or a drain problem worth checking.
Warnings and stop conditions
- Loweditorial warning
Do not add more detergent to make up for a wash that comes out less clean: LG links Sud to overdosing, and extra foam can escape through the drawer or door.
Evidence: LG USA front-load washer error code list · [LG Front Loader] How to Clean the Tub
Symptoms and causes
Probable causes · in order
- Too much detergentCommon
The main cause according to LG. Fits if you dose by eye or with lightly soiled laundry, and is fixed by lowering the dose.
Evidence: LG USA front-load washer error code list
- Unsuitable detergentPossible
LG asks for HE detergent. One made for hand washing or high foaming triggers the notice even at a small dose.
Evidence: LG USA front-load washer error code list
- Built-up detergent residuePossible
LG suggests the Tub Clean cycle. Fits if the notice persists after correcting the dose and type.
Evidence: LG USA front-load washer error code list · [LG Front Loader] How to Clean the Tub
Virtual technician
Does SUD still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
LG USA front-load washer error code list
LG Electronics · 2026 · official_doc
- 2
[LG Front Loader] How to Clean the Tub
LG Electronics · 2025 · official_doc
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