Direct answer
For the Samsung WF45K6500 AddWash washer, treat standing water as a drain-path problem until the pump, filter, hose and household drain are separated. First, cancel the cycle, run Drain/Spin and listen for the pump.
What this covers
- Samsung WF45K6500 AddWash washer (WF45K6500A*)
- Samsung electronic-control front-load washer; confirm the exact code against the model label.
- The specific fault this record addresses: will not drain or stops with water inside
What it does not cover
- ×The same symptom on a different Samsung product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
The drain pump filter is clogged
What separates it The pump audibly runs but no water moves, or drains extremely slowly. Coins, hair clips, lint and small fabric items collect here over months and this is the single most common cause on a front-load machine.
How to confirm Front-load washers have an owner-accessible drain pump filter behind a small door at the bottom front of the cabinet. Open it over a shallow pan and towels — it will release standing water first, often a gallon or more.
- 2
An object is jamming the drain pump impeller
What separates it The pump makes a humming or buzzing sound without the normal water-movement noise, or makes a rattling sound as something strikes the impeller.
How to confirm On a machine with an accessible filter, the impeller is usually visible and turnable by hand once the filter is out and power is disconnected. On a top-load washer without an owner-accessible filter, this is a service diagnosis.
- 3
The drain hose is kinked, or pushed too far down the standpipe
What separates it Water drains and then partially returns, or the tub refills on its own after draining. A drain hose inserted too deep into the standpipe creates a siphon that pulls water back out of the machine.
How to confirm Check the hose for kinks behind the machine, and confirm the insertion depth and the standpipe height against the manual's stated range — both a too-low and a too-high standpipe cause drain faults.
- 4
The household drain or standpipe itself is restricted
What separates it The washer drains but the standpipe backs up and overflows, or a nearby sink gurgles or backs up when the washer drains.
How to confirm This is a plumbing problem rather than an appliance one — the tell is water backing up outside the machine rather than sitting inside it.
- 5
Excess suds are suppressing the drain cycle
What separates it The machine reports a drain problem after a load with heavy detergent, and foam is visible through the door or in the tub.
How to confirm See the suds-foam symptom — many machines pause draining and run extra rinses when they detect foam, which presents as a drain fault.
- 6
The drain pump has failed electrically
What separates it No pump sound at all during a Drain/Spin cycle — not a hum, not a rattle, silence where a pump should be audible.
How to confirm This is the conclusion once the filter is confirmed clear and the hose routing is correct.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- Whether the pump makes any sound at all during a Drain/Spin cycle — a hum with no water movement, a rattle, or complete silence are three different faults.
- Whether water backs up outside the machine at the standpipe (a plumbing problem) or simply sits inside the tub (an appliance problem).
- Whether the tub drains and then refills on its own, which points specifically at drain-hose siphoning rather than a blockage.
- How much detergent was used on the affected load, since heavy suds can trigger a drain fault on a machine with a working pump.
Cancel the cycle and run Drain/Spin, listening for the pump
ReversibleThis separates a pump that is not running at all from one that is running against a blockage.
Clean the drain pump filter over a pan and towels
ReversibleIt is behind a small access door at the bottom front of the cabinet, and it will release standing water before it comes free — have more towels than you think you need.
Check the drain hose for kinks and confirm the standpipe height and insertion depth
ReversibleA hose pushed too far into the standpipe siphons water back out; the manual states both a minimum and a maximum standpipe height.
Arrange service for a silent or jammed pump once the filter and hose are confirmed clear
ReversibleOn a top-load machine with no owner-accessible filter, a pump problem is a service call rather than a maintenance task.
Run a short rinse and drain with no laundry to confirm
ReversibleConfirms the full path is clear before trusting it with a real load.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- WF45K6500A*. Samsung electronic-control front-load washer; confirm the exact code against the model label.
- Type & capacity — AddWash
- 4.5 cu. ft. FRONT-LOAD washer with the AddWash door: a small second door-in-door that lets you drop in items mid-cycle. That AddWash door has its own latch and seal — a leak or a 'door won't open/close' complaint can be the AddWash door specifically, separate from the main door.
- Motor & vibration
- Belt-less Digital Inverter Motor with VRT+; shaking is balance and shipping bolts, not a belt.
- Smart features
- SmartThings Wi-Fi and Self Clean. The AddWash door only opens when the cycle is safely paused (temperature/level permitting), so it not opening mid-cycle can be the safety interlock, not a fault.
- Symptom boundary
- This record covers Samsung WF45K6500 AddWash washer when it will not drain or stops with water inside. A different symptom on the same hardware, or this symptom on a different Samsung product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !Stop for wastewater backing up out of the standpipe or a nearby drain — that is a household plumbing problem and continuing to run the washer will flood the floor.
- !Broken glass in the filter housing, a burning smell from the pump, or water reaching wiring or an outlet means stop and disconnect power before anything else.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. Samsung Support publishes this as "Samsung washing machine information and error codes". Samsung's own washer troubleshooting and error-code article; covers filling, draining, spin and unbalanced-load conditions. What that article does not carry is the model boundary — it is written for a product line, and WF45K6500A* is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
The AddWash door on my Samsung won't open mid-cycle.+
The AddWash door is interlocked for safety — it will only release when the machine can safely pause, which it cannot do when the water is hot or the level is high (for example during a hot wash or a spin). Press pause and wait for the machine to reach a safe state; if conditions do not allow it, the door stays locked by design. If it never opens even at the start when empty and cool, then the AddWash latch itself needs attention.
There's still water in the drum and the pump is humming but nothing happens.+
A hum with no water movement points to a clogged filter or a jammed pump impeller rather than a failed pump. On a front-load washer, open the drain pump filter behind the small door at the bottom front of the cabinet — over a pan and towels, because it will release the standing water first.
The washer drains but then water comes back into the drum.+
That is drain-hose siphoning, not a pump fault. The hose is likely pushed too far down the standpipe, which lets it pull water back out of the machine. Check the insertion depth and standpipe height against the manual's stated range.
Where is the drain filter on a top-load washer?+
Most top-load washers have no owner-accessible drain filter at all — that is a front-load feature. On a top-loader, a confirmed drain blockage past the hose is normally a service call rather than something to clean out yourself.
Does this answer apply to every Samsung model?+
No. It is scoped to WF45K6500A*. Samsung electronic-control front-load washer; confirm the exact code against the model label.
What should I record before troubleshooting not draining or water left or drain pump?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing not draining, water left, drain pump. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Stop for wastewater backup, glass, burning odor or water near wiring.
Answer for the exact device and software version shown above.