The short answer
The single most useful thing you can establish about a leak on Avanti SLTW is which part of the cycle it happens in: fill, wash or drain. Each stage pressurises a different part of the machine, so the timing narrows the cause before anything is moved. On a compact top-loader the cabinet is lighter than the load it spins, so anything that upsets the balance moves the whole machine.
What you observe on these models
- Water only while it is filling — Fill-stage leaks are on the supply side, which is the most accessible part of the machine and the easiest to fix.
- Water only during the drain step — A drain-side leak: the connection at the standpipe, or a standpipe that overflows because it cannot take the flow.
- Water at the front of the machine under the door — On a front-loading machine this is the boot; on a top-loader it is more likely to have travelled from elsewhere.
- Foam rather than water — Oversudsing.
- NEAR MISS — water under the machine after it has been idle for days — That is a supply connection dripping with the machine off, and the tap should be closed until it is fixed.
Causes, most likely first on SLTW
- The drain connection or an overflowing standpipe — Water appearing only during the drain step is a drain-side report, not a tub-side one, and the timing separates them cleanly. Ranked first on Avanti SLTW because a narrow cabinet packs the tub, the pump and the hose run close together, so a restriction in that path shows up in almost every other symptom as well.
- The fill hoses and their washers — Hose connections are the most common washer leak and the easiest to confirm: they are accessible, they drip under pressure, and the water is clean.
- The pump filter cover — A filter cover that was not seated after cleaning leaks a small amount on every cycle, always from the same low corner.
- The machine is not level — A machine that walks during spin can unseat a hose or move against a wall, and the leak is then a consequence rather than a cause.
- Oversudsing — Foam escapes where water would not, so an apparent leak that only appears with a particular detergent is usually the detergent. Last on this list, and the item that every cause above it can imitate exactly.
Check in this order, and why that order
- Dry everything and place paper at each corner — Run one cycle and read the paper. Position plus stage is most of the diagnosis and it costs one cycle.
- Inspect the door seal or the tub-to-cabinet seal — Run a finger right round the bottom of it and look for grit, a hair clip or a tear. The bottom of the seal is where everything collects.
- Re-seat the pump filter cover — A cover that was not tightened after cleaning leaks a little on every cycle, which is exactly the pattern people find hardest to trace.
- Put a level on the top of the machine — A machine that walks unseats hoses and moves against walls, so levelling is both a fix and a prevention.
Before you open anything
Safety
Unplug the washer or switch off its breaker before removing any panel, and close the tap before touching a fill hose. A capacitor can hold a charge after the power is off. Close both taps before working on any hose connection, and mop the floor before moving the machine.
Models this page covers — the SLTW family
Reference| Model number | Family key |
|---|---|
| SLTW37D0W | avanti:washer:sltw |
When to call a technician
Call when the leak is not at a hose, not at a seal you can see, and not at the filter cover — at that point it is inside the cabinet and the machine has to come apart. Call immediately if water is reaching an outlet, if the machine has tripped protection since the leak began, or if the leak is large enough to appear during a single cycle. On Avanti SLTW the accessible causes above cover most reports and cost nothing but a cycle and a torch. One more thing that is specific to this family: the SLTW variant table on this page is the whole of what is covered here — a single model number and nothing else. If the plate on your machine is not one of them, the ranking above was not written for it.
Other problems covered for the SLTW family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
