Whirlpool's own Product Help for suds in a front-loader like the WFW9620 explains the displays. If you see Sud or Sd with the Rinse status light on, the washer is removing suds and you should let the cycle continue: it extends the rinse time, pauses tumbling and adds water so the bubbles can break, and may repeat that several times. If you see Sud or Sd with the Cycle Complete light on, the washer detected too many suds during the cycle, and the load may not be thoroughly rinsed, so run a Rinse/Spin. Use only HE detergent at the maker's dose, avoid no-splash or easy-pour bleach, and check the bulk dispenser is not adding to detergent you add by hand.
Differential
Likely causes of “Whirlpool WFW9620 front-load washer shows excessive suds, SUD or Sd behavior”, and how to tell them apart
- 1
Non-HE or too much detergent
What separates it Sud or Sd shows on the display because non HE or too much detergent was used
How to confirm Use HE detergent only, measured to load size and soil
- 2
Thickened bleach
What separates it Suds appear when bleach is used because the bleach is thickened
How to confirm Use regular liquid bleach; run the washer empty or clean with affresh before the next load
- 3
A bulk dispenser adding detergent as well as your dose
What separates it There are excess suds because a bulk dispenser is adding detergent as well as your own
How to confirm Do not add detergent by hand when the bulk dispenser is enabled
- 4
A restricted drain hose or standpipe
What separates it Sud shows with slow draining because of a restricted drain hose or standpipe
How to confirm Straighten the hose, and check the standpipe height
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the Rinse or Cycle Complete light was on with Sud
- Whether the bulk dispenser is enabled
Try in this order
0 of 5 completedLet a suds cycle run
ReversibleLet a suds cycle run, since with the Rinse light on the washer is removing suds, so wait.
Rinse again
ReversibleRinse again, and if Cycle Complete is on, select a Rinse and Spin cycle, and then test again to see whether it helped.
Use HE detergent only
ReversibleUse HE detergent only, and follow the maker's dose for the soil and the load size.
Change the bleach
ReversibleChange the bleach, and use regular liquid chlorine bleach, not no splash or easy pour.
Check the bulk dispenser
ReversibleCheck the bulk dispenser, and if enabled, add no extra detergent and set the concentration correctly.
Model-specific
What is true of this model and not of its siblings
- Bulk dispenser and concentration
- If the washer has a bulk dispenser feature and it is enabled, there is no need to add detergent to the load, and doing so can cause excess suds. The concentration level entered in the washer must match the detergent in the reservoir; a wrong setting doses too much and is a common source of suds on the Load & Go XL Plus dispenser.
- Suds in the Clean Washer cycle
- Whirlpool warns that thickened, easy-pour or no-splash bleach in the Clean Washer with affresh cycle can cause excess suds, and that a no-splash bleach in an ordinary wash can too. If that has happened, run the machine empty using regular liquid bleach or clean with affresh washer cleaner before running another load, so the leftover thickener does not foam the next wash.
- Why a front loader makes too many suds
- A front-load washer needs far less detergent than a top loader, and the right dose depends on the load size and the water hardness. Soft water makes more suds, so use less. Measure with the cap, and use a detergent marked HE. If you see foam in the glass, run a rinse cycle and reduce the dose next time.
- Cleaning the machine
- Residue builds up in the drum and the dispenser and makes a machine foam. Run a monthly Tub Clean cycle with the cleaner the manual recommends, wipe the gasket and leave the door ajar to dry. Check the drawer for caked detergent.
- Parts for this problem on the WFW9620 (RepairClinic, 2026-09-20)
- dispenser drawer, part number W11524105, at $69.94; water level pressure switch, part number W11316246, at $80.94.
- Other models this page answers
- These steps also fit models WFW8620, WFW6720, WFW6605, WFW5605, WFW5090, WFC8090, WTW8127, WTW7120, WTW6157, WTW6120, WTW5057, WTW5010, WTW4855, WTW4816.
Stop boundary
When this stops being a self-service repair
- !If suds reach the floor or the rear vent, stop and unplug the washer
- !If Sud returns with the right dose and a clear drain, call Whirlpool service
Evidence ledger
Sources behind this answer
Whirlpool's own table of front-load washer codes and resolutions.
Whirlpool's own symptom articles for front-load washers, each.
Whirlpool's own product page giving the size, capacity, dispenser and app features.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-20.
Exact questions
Common questions
What does Sud or Sd mean?+
There are too many suds in the washing machine; the washer will extend rinsing to remove them.
Should I stop the washer?+
No, if the Rinse light is on; let it continue.
What if Cycle Complete is lit?+
Run a Rinse/Spin cycle for further rinsing.
What detergent does Whirlpool recommend?+
Swash, an 8x concentrate that works in HE and non-HE washers.
Can the drain cause Sud?+
A restricted drain hose or standpipe can trigger it; check both.
How much detergent does a front loader need?+
Usually one to two tablespoons for a normal load, less in soft water.
Does fabric softener cause suds?+
Too much can; use the dispenser compartment only.