The short answer
A washer that will not drain has a restriction far more often than a failed pump. A pump that has died is silent; a pump fighting a blockage hums, strains and leaves the tub full, and that distinction is the whole diagnosis. Listen during the drain step. A hum with no water leaving means the pump is powered and obstructed; complete silence means the pump is not being driven at all. On a Smeg washer the cause that ranks first is pump filter or coin trap blocked.
What you observe
- Water backing up out of the standpipe onto the floor — The restriction is in the building, not in the machine.
- Water standing in the drum at the end of the cycle — The tub never emptied, so the spin never ran.
- NEAR MISS — water appears on the floor during the wash — That is a leak, and it belongs on the water-leak page.
Causes, most likely first on a Smeg washer
- Pump filter or coin trap blocked — Lint, coins, hair grips and tissue build into a mat in the filter chamber until the pump can no longer draw through it. It ranks first on a Smeg washer because there is very little slack behind the panels of a compact cabinet, so anything that restricts restricts completely.
- Drain hose kinked, or pushed too far into the standpipe — The hose is crushed behind the machine when it is pushed back, or inserted so deep into the standpipe that it siphons and blocks. Second on this platform: the hose is the part that moves every time the machine is moved, so it is the likeliest thing to have changed.
- Foreign object jamming the pump impeller — A coin or an underwire reaches the impeller and locks it, so the motor buzzes while nothing moves. Ranked here because it produces a buzz with no flow, which is a different sound from a healthy pump and from a dead one.
- Standpipe or house drain restricted — The blockage is in the building rather than the machine, and it usually shows as water backing up out of the standpipe rather than staying in the drum. Last, and the reason to work down the list rather than guess: water coming back out of the standpipe points at the house, and no work on the machine will help.
Check in this order, and why
- Open the filter access at the bottom front and look at what comes out — It is the commonest cause and it needs no tools on most machines.
- Pull the machine forward and follow the drain hose end to end by hand — A crush point or an over-deep insertion is found in a minute.
- Listen during the drain step for a buzz with no water movement — A buzz without flow is a jam, not a failed motor.
What an owner can safely check
- Put a tray down, open the filter, clear it by hand and refit it squarely — Expect water: the chamber holds a good deal of it.
Tools: shallow tray, towel, gloveAbout 25 min
- Straighten the hose, re-clip it, and set it no deeper into the standpipe than the marked depth — Do not tape the hose into the standpipe: it needs an air break.
Tools: torchAbout 15 min
- With the power off, open the filter and turn the impeller by hand to check it spins freely — Anything hard you find in there is the cause.
Tools: shallow tray, towel, gloveAbout 20 min
- STOP HERE — the next check means a meter, a panel, or both — The ranking above tells you what to ask for; it does not make the remaining tests owner work.
Before you open anything
Safety
Unplug the machine or switch off its breaker before opening the filter, and shut both taps before disconnecting anything. Put a tray and towels down first — the filter chamber releases far more water than people expect.
When to call a technician
Call once every restriction you can reach is clear and the tub still will not empty, and sooner if the machine trips the breaker during the drain step. On a European-controlled machine, ask what the control was reporting when it stopped — it usually records why it aborted, and that shortens the visit.
Nearest pages of this class
What this page does not cover
This is the generalized page for a Smeg washer. It does not carry anything model-specific: no part numbers, no wiring colours, no panel sequence and no torque figures, because those differ between families sold under the same badge. Where a family- or model-level page exists it is linked above, and it is the more specific answer of the two.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
