Summary

The spin cycle is the highest-stress phase a washing machine goes through — the drum accelerates to 800–1600rpm, throwing several kilograms of wet laundry against the drum wall under significant centrifugal force. Because of this, washing machines are built with multiple safety interlocks that will silently prevent a spin from starting or will abort one mid-cycle: the machine must have drained, the door must be confirmed locked, and the load must be reasonably balanced. A "won't spin" fault is very often not a spin-specific fault at all — it's the machine correctly refusing to spin because an earlier stage of the cycle didn't complete properly.

Once those interlocks are ruled out, the fault moves into genuinely mechanical or electrical territory: a worn drive belt (on belt-driven machines — most direct-drive machines have no belt to check), worn carbon brushes on the motor, a failed motor control PCB, or worn suspension springs and dampers that let the drum move too much for the out-of-balance sensor to accept.

This article covers the diagnostic sequence from "machine finishes but clothes are soaking wet" through to motor and suspension component checks, plus the electrical and plumbing regulations relevant to a washing machine installation, since a marginal supply or waste connection is a common contributing factor.

Key Facts

Quick Reference Table

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Symptom Most likely cause Fix
Cycle finishes, clothes soaking wet, no spin attempted Drain not completed — see dishwasher not draining for equivalent pump/filter logic Check filter, drain hose, pump before anything else
Door won't lock / "door open" error, no spin Electronic door lock (EDL) failed Test EDL continuity; replace if open circuit
Spin starts, machine bangs loudly, aborts Load out of balance, or worn suspension/dampers letting drum move excessively Redistribute load; if balanced and still banging, replace dampers/springs
Spin very weak or slow compared to normal Worn carbon brushes (belt-driven/universal motor machines) Inspect and replace brushes
No spin at all, motor silent Broken/slipped drive belt (belt-driven models) or motor/PCB fault Check belt tension/condition; test motor windings and PCB output
Spin works intermittently, worse when hot PCB or motor overheating fault Test under load with multimeter; replace PCB or motor as confirmed
Machine walks/moves across floor during spin Feet not levelled, or transit bolts left in after delivery Level feet; confirm transit bolts removed
E-code for door/lock/balance shown Refer to manufacturer code list first Brand-specific — narrows diagnosis before strip-down

Detailed Guidance

Step 1: Isolate before opening the machine

  1. Switch off at the fused connection unit or socket, or unplug — confirm dead with a voltage tester before removing any panel.
  2. Turn off the appliance isolation valve on the cold feed.
  3. Pull the machine forward — check for a transit bolt bracket left on the rear panel from delivery/installation (a very common cause of excessive vibration and spin abort if never removed).
  4. Have towels ready for residual water in the drum and hoses.

Step 2: Diagnostic tree

Washing machine not spinning
├── Did the drain cycle complete? (check for standing water in drum)
│     ├── Water still present → treat as drain fault first
│     │       → Check filter (front-bottom access panel), drain hose, pump
│     │       → Spin will not resume until drain confirmed complete
│     └── Drum empty, drained fully → proceed
│
├── Check door lock status
│     ├── Door won't lock / error code shown → test EDL for continuity when energised
│     │       → Open circuit / no click = EDL failed → replace
│     └── Door locks correctly → proceed
│
├── Attempt spin — what happens?
│     ├── Loud banging, then abort
│     │       → Redistribute load, retest with balanced small load
│     │       → Still banging with balanced load → suspension springs/dampers worn
│     │
│     ├── Weak/slow spin, motor runs
│     │       → Belt-driven model → check belt condition/tension
│     │       → Universal motor → inspect carbon brushes for wear
│     │
│     └── No motor movement at all, silent
│             → Test motor winding resistance (multimeter)
│             → Test PCB output to motor during commanded spin
│             → No output from PCB = board fault; output present but motor dead = motor fault
│
└── Machine walks/vibrates excessively during spin
      → Check feet are adjusted and machine is level
      → Check transit bolts removed
      → If level and bolts removed, treat as suspension fault

Checking and replacing carbon brushes

  1. Isolate power. Access is usually via the rear panel (a few screws) on belt-driven machines with a universal motor.
  2. Locate the two brush holders on opposite sides of the motor housing — each is typically a small spring-loaded cap.
  3. Unscrew the cap and withdraw the brush; measure remaining length against the manufacturer's minimum (commonly around 5mm remaining before replacement is needed).
  4. Fit new brushes as a pair, even if only one is worn — they wear at a similar rate and mismatched brushes cause uneven motor wear.
  5. Reassemble, restore power, and run a test spin cycle.

Carbon brush replacement typically costs £15–£35 in parts and 30–45 minutes labour.

Checking and replacing a drive belt

  1. Isolate power. Remove the rear panel.
  2. Locate the belt running between the motor pulley and the larger drum pulley.
  3. Check tension (should deflect roughly 10mm under moderate thumb pressure) and condition — cracking, glazing, or fraying means replacement regardless of whether it has actually snapped.
  4. To fit a new belt: loosen the motor mounting bolts to slacken tension, slip the old belt off, fit the new belt over both pulleys, then re-tension by pulling the motor back and re-tightening the mounts.
  5. Rotate the drum by hand to confirm smooth, even belt travel before restoring power.

Belt replacement typically costs £10–£25 in parts and 30–60 minutes labour.

Replacing the electronic door lock (EDL)

  1. Isolate power. Remove the door boot/gasket retaining clip on front-loading machines to access the lock mechanism from inside the door aperture, or remove the front control panel depending on model.
  2. Disconnect the wiring plug from the EDL (photograph first).
  3. Remove the 2–3 retaining screws and withdraw the unit.
  4. Fit the replacement, matched by part number.
  5. Reconnect wiring, refit door boot/clip, restore power, and test the door locks and a full cycle completes.

EDL replacement typically costs £15–£40 in parts and 30–45 minutes labour — one of the cheaper, higher-frequency repairs on modern machines.

Suspension springs and dampers

Worn dampers are diagnosed by excessive drum movement when pushed by hand with the machine unplugged and the door open — a healthy suspension resists firm hand pressure with some give and returns the drum to centre; a worn one moves loosely with little resistance. Springs are diagnosed similarly — sagging or a broken spring lets one side of the drum hang lower than the other.

Replacement requires accessing the underside/rear of the outer tub and is a more involved job (45–90 minutes) than the checks above. On machines over 8 years old with worn suspension, weigh up repair cost against the appliance's remaining service life before committing the customer to the job.

Frequently Asked Questions

The machine drains fine but still won't spin — what's next?

If drainage is confirmed complete and the door locks correctly, move to the motor/belt checks. Also verify the out-of-balance sensor isn't being tripped by a genuinely unbalanced load — test with a small, evenly distributed load (e.g. three or four towels) before condemning any component.

Is a "not spinning" fault covered by warranty if the machine is under 2 years old?

Most UK manufacturers provide a minimum 2-year warranty under the Consumer Rights Act 2015 (goods must be of satisfactory quality and fit for purpose); many extend parts/labour warranties on components like motors to 5 or 10 years. Always check the specific manufacturer's terms and advise the customer to claim through the manufacturer or retailer first if the appliance is still in warranty, rather than paying for an independent repair.

Can an unbalanced load damage the machine permanently if it keeps happening?

Yes — repeated hard out-of-balance events accelerate wear on the suspension dampers and drum bearings even when the safety cutout prevents catastrophic failure each time. If a customer reports frequent out-of-balance aborts even with sensible loading, check the suspension and feet levelling rather than just advising "load it differently."

Do I need to be Part P registered to replace a washing machine's carbon brushes or door lock?

No — like-for-like component replacement within an existing appliance is not notifiable electrical work under Part P. Part P applies to fixed wiring work (new circuits, consumer unit changes, socket/spur additions), not appliance repair. However, if the fault investigation reveals the supply circuit itself is faulty (e.g. a failing FCU or undersized cable), that remedial work may be notifiable.

Why does the machine walk across the floor during spin even though it seems level?

Check for transit bolts first — these are rigid brackets fitted for shipping that lock the drum solid, and if not removed during installation the drum cannot float freely during spin, causing violent vibration. This is a very common fault on newly delivered or newly reconnected machines and is often missed by installers in a rush.

Regulations & Standards