A Samsung WA55A7300 that fills with foam, runs a long rinse or shows a suds message is dealing with more detergent than the water can rinse away. This 5.5 cubic foot top-loader is a high-efficiency machine with a low water level, which means soap is diluted less than in an old washer, and a slightly generous dose becomes a tall head of foam. Samsung's control senses the foam, slows or pauses the wash and adds rinses until it clears, which stretches a cycle far past its estimated time.
The checks in more detail
If the foam reaches the lid it can spill. If foam is high, pause the cycle and let it settle, then wipe up any spill. Run a rinse and spin with no detergent; repeat if suds remain. Then look at the cause. Measure the detergent with the cap or scoop and use the amount for the load size and soil level, which for a concentrated high-efficiency liquid is a small amount.
A standard detergent that is not made for high-efficiency machines foams badly in this washer, so switch to one marked HE. If your water is soft, naturally or through a softener, the same dose makes more foam; halve it. Clear the build-up as well. A drum that has had frequent overdosing holds soap film that can release foam into later loads, so run the Self Clean cycle when the reminder appears.
Check that the detergent is going into the correct compartment, with liquid in the main compartment and not in the softener well, and that the drawer is not clogged. Avoid mixing different detergents, and never add dishwashing liquid. Pretreat very dirty items and do not stuff the drum, since a tightly packed load holds soap. If foam keeps returning with a correct, modest dose of HE detergent and a clean drum, give Samsung support the model number WA55A7300 and describe when the suds appear.
Differential
Likely causes of “Samsung WA55A7300 top-load washer shows excessive suds, SUD or Sd behavior”, and how to tell them apart
- 1
Too much detergent
What separates it Foam rises toward the lid
How to confirm Measure a smaller dose
- 2
A non-HE detergent
What separates it Foam and long pauses
How to confirm Switch to an HE product
- 3
Soft water
What separates it The same dose foams more
How to confirm Halve the dose
- 4
Residue in the drum
What separates it Suds from a lightly soiled load
How to confirm Run Self Clean
- 5
The wrong compartment
What separates it Liquid in the softener well
How to confirm Use the main compartment
Before you touch a setting
Record this first — changing settings destroys the evidence
- The detergent type and dose
- Whether the water is softened
- Whether detergent went into the correct compartment
- When Self Clean was last run
Try in this order
0 of 6 completedPause and let it settle
ReversibleIf foam is rising.
Run a rinse and spin
ReversibleWith no detergent.
Use an HE detergent
ReversibleAnd measure it.
Halve the dose
ReversibleFor soft water.
Run Self Clean
ReversibleWhen the reminder appears.
Check the compartments
ReversibleDetergent in the main well.
Model-specific
What is true of this model and not of its siblings
- Why HE machines foam
- Low water means soap is diluted less.
- The control response
- It senses foam, pauses and adds rinses.
- Soft water
- It makes the same dose foam more.
- Residue
- Old soap film can release foam into later loads.
- Compartments
- Detergent belongs in the main well.
- Samsung help
- Quote WA55A7300 and the serial number.
- Parts for this problem on the WA55A7300 (RepairClinic, 2026-09-21)
- assy detergent-module;wa7000a,greige,pp, part number DC97-20589N, at $175.69; water-level pressure switch, part number DC96-01703N, at $134.56.
Stop boundary
When this stops being a self-service repair
- !Wipe foam spills at once
- !Do not add dishwashing liquid
- !Call Samsung if foam returns with a correct dose
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why is my Samsung full of suds?+
Too much or the wrong detergent.
Will the washer fix it itself?+
It pauses and adds rinses, which lengthens the cycle.
How much detergent?+
The printed dose for the load, less for soft water.
Can I add vinegar?+
Follow the manual and do not mix cleaners.
Does Self Clean help?+
Yes, it clears residue.
Is foam harmful?+
It strains the washer and wastes time.