The short answer
On the Avanti STW models covered here a refusal to start is most often the lid or door circuit, the power supply or a setting rather than a failed control. This is a light cabinet with a vertical tub, a lid switch that gates the spin, a small drain pump and a hose run that is often temporary rather than plumbed — and the control will not proceed until it is satisfied about the door.
What you observe on these models
- Completely dead — no lights, no sounds — A power report.
- It hums briefly then stops — Something is being asked to move and cannot, or a protective device is opening almost immediately.
- No lock sound after pressing start — The lock should be audible within a second or two.
- It worked an hour ago and now will not — A thermal cut-out that has not reset, or a supply that has dropped out.
- NEAR MISS — it starts and then stops mid-cycle — That is a stalled-cycle fault, not a start fault, and it belongs on the cycle page.
Causes, most likely first on STW
- The lid or door latch — A machine that will not confirm its door is shut will not begin. On a front-loader you should hear the lock engage a moment after start. Ranked first on Avanti STW because a shallow tub with short suspension travel reaches its limit far sooner than a full-size machine, so load distribution leads the list here.
- Power at the machine — Outlet, breaker and plug come first because they are free to check and because a machine with no display and no lock sound has no power, whatever the owner has assumed.
- A motor thermal cut-out — A motor that has overheated will refuse to restart until it has cooled, which produces a machine that worked an hour ago and will not now.
- Program selection, delay start or a child lock — A delay timer left set, or a child lock engaged by a stray press, accounts for a meaningful share of these calls and costs nothing to rule out.
- The control board or the timer — Last, because it is both the least likely and the most expensive, and because every item above it mimics it exactly. Last on this list, and the item that every cause above it can imitate exactly.
Check in this order, and why that order
- Prove the outlet with something else — A lamp or a phone charger in the same outlet takes ten seconds and settles the most common cause outright.
- Check for a delay start or a control lock — Both are set by accident and both produce a machine that appears dead while being entirely healthy.
- Confirm the taps are open — Several machines will not begin without water available, so a tap closed during other work presents as a refusal to start.
- Leave it thirty minutes and try again — A motor thermal cut-out resets on cooling. A machine that starts after a rest has told you something specific about what was wrong.
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. Do not test an outlet by touch and do not bypass a lid or door switch to make the machine run: the switch exists to stop the drum turning while it is open, and defeating it removes the only protection in the machine.
Models this page covers — the STW family
Reference| Model number | Family key |
|---|---|
| STW16D0W | avanti:washer:stw |
| STW20D2P | avanti:washer:stw |
| STW30D0W | avanti:washer:stw |
When to call a technician
Call when the outlet is proven good, the lid or door lock is silent or clearly damaged, and no setting explains it. Call immediately if the machine trips protection when it is plugged in, if there is a burning smell, or if it hums and heats without moving. On Avanti STW the outlet, the lock and the settings account for most of these reports, and a technician will begin with exactly those three. One more thing that is specific to this family: the STW variant table on this page is the whole of what is covered here — these 3 model numbers 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 STW family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
