Washing Machine Won’t Spin: Is the Capacitor Dead?

Is it the capacitor? The 60-second check

A dead run capacitor has a distinctive signature. Check yours against these three:

1. It failed suddenly. The machine washed fine yesterday; today the motor hums and the drum doesn’t turn. Outright capacitor failure usually happens overnight. The slow-fade version is sign 3.
2. It hums, then gives up. A steady mains hum for ten to thirty seconds, then a click as the motor’s thermal cutout trips.
3. The drum spins if it gets help. If the drum takes off after a bump or a helping push at the start of a cycle, that’s a capacitor limping along on partial capacitance.

Not quite your machine? This table narrows it down:

Symptom	Most likely cause	Capacitor?
Hums 10-30 seconds, drum never turns, clicks off	Failed run capacitor	Yes, classic sign
Spins only after a push at cycle start	Weak (failing) run capacitor	Yes
Washes and drains, but no spin cycle, no hum	Lid switch or door interlock	No
Won’t spin and there’s still water in the drum	Blocked drain pump: the machine refuses to spin until it’s empty	No
Motor runs but drum doesn’t move	Snapped or slipped belt	No
Sparking or a burnt-carbon smell before it stopped	Worn motor brushes (universal-motor machines)	No
Grinding, rumbling, drum wobbles	Drum bearings	No
Completely dead, no lights	Power supply or control board	No

Does your washing machine even have a capacitor?

Not every washing machine has a capacitor. Fisher & Paykel SmartDrive top-loaders (one of the most common washing machines in New Zealand) use a direct-drive brushless motor with no belt and no motor-run capacitor. LG Direct Drive machines are the same. If your machine is one of these, a capacitor is not the reason it won’t spin: the usual culprits are a failed lid switch, a blocked drain pump, or the motor controller board. The machines that do use a motor-run capacitor are belt-drive models with induction motors: many older belt-drive top-loaders, of every brand. The quick check: unplug the machine and look for a belt behind the rear panel. If there’s a belt, the capacitor is a small plastic cylinder (usually 8-16µF, 370-450VAC) mounted on a bracket near the motor.

You won’t find that warning on most overseas repair guides. SmartDrives are a New Zealand and Australian thing. But if the motor has no capacitor, no capacitor will fix it. SmartDrive no-spin faults are lid switch, pump or controller: parts we don’t sell. An appliance technician or F&P parts supplier is your next stop, and you’ve saved the cost of a capacitor you didn’t need.

The three motor types:

Motor type	How to recognise it	Run capacitor?	Typical value
Direct-drive brushless (F&P SmartDrive, LG Direct Drive)	No belt: motor sits directly on the drum shaft; often badged “Direct Drive”	No	-
Belt-drive universal (brushed) motor	Belt, plus a motor with visible carbon brushes; common in front-loaders	No, speed is board-controlled	-
Belt-drive single-phase induction motor	Belt, smooth cylindrical motor, capacitor on a bracket nearby	Yes	8-16µF, 370-450VAC, ±5%

Why does my washing machine hum but not spin?

A single-phase induction motor can’t start itself. The run capacitor shifts the current phase in the motor’s second winding, creating the rotating magnetic field that tells the motor which way to turn. Without it the motor has torque in no particular direction: it sits humming at mains frequency, heating up until the thermal cutout trips.

That’s why a nudge gets a weak-capacitor machine going (you’re providing the starting rotation the capacitor no longer can) and why the fix is cheap: the windings are usually fine.

One caution: a seized pump or jammed drum hums the same way. With the machine unplugged, turn the drum by hand: if it’s stiff or locked, the capacitor isn’t your problem.

What else stops a drum spinning?

All of these are checkable with the machine unplugged:

1. The belt. Snapped, or thrown off its pulley. The motor runs happily while the drum sits still.
2. Motor brushes. Universal (brushed) motors, common in belt-drive front-loaders, wear their brushes out after years of use, usually with sparking and a burnt-carbon smell near the end. These motors don’t use a run capacitor.
3. Lid switch or door interlock. If the machine fills, washes and drains but never attempts a spin (no hum at all), it thinks the lid is open.
4. Blocked drain pump. Most machines refuse to spin with water in the drum. Clear the pump filter (front bottom corner on most front-loaders) and look for the sock or the stray coin.
5. Bearings. Grinding, rumbling, visible drum wobble: a mechanical rebuild, not an electrical fault.

For what a failed capacitor looks like from the outside (bulged top, split case, leaked oil), see how to identify a failed motor-run capacitor.

How do you test a washing machine capacitor with a multimeter?

You’ll need a multimeter with a capacitance range (marked µF). The method is identical to testing a pump capacitor (full walkthrough in how to test a capacitor with a multimeter) but in short:

1. Unplug the machine at the wall. Out of the socket.
2. Get access. Rear service panel on most front-loaders; tip top-loaders onto their back (never the front: you’ll damage the control panel).
3. Discharge the capacitor. A 10-20 kΩ, 5 W bleed resistor across the terminals for 5-10 seconds.
4. Disconnect the spade terminals. Photograph the wiring first.
5. Read the label. Note the printed value, say, 10µF ±5% 450VAC.
6. Measure. Set the meter to capacitance, probes across the terminals, wait a few seconds for the reading to settle.
7. Compare. Within ±5% of the label (9.5-10.5µF for a 10µF cap): the capacitor is fine, look elsewhere. Outside that band, and especially 10% or more low, reading zero, or showing “OL”: replace it.

What size capacitor does a washing machine use?

A belt-drive washing machine uses a motor-run capacitor of about 8-16µF (most commonly 10-12µF) rated 370-450VAC for New Zealand’s 230V/50Hz mains. The exact value is printed on the capacitor’s label: for example “12µF ±5% 450VAC”. Match the µF on the label; within ±5% is fine. Voltage may be the same or higher (450VAC safely replaces 400VAC; never go lower), but don’t round the capacitance to a different size: fitting 16µF where 10µF belongs changes the motor’s phase shift and overheats the windings. Most washing machine capacitors carry the body code CBB60: a plastic cylinder with two spade terminals or flying leads. Don’t buy by machine model, because manufacturers change motors mid-production; buy by the numbers printed on the old capacitor. If the label has cooked itself unreadable, the motor’s own nameplate usually lists the capacitor value too.

We stock the washing-machine sizes (8µF, 10µF, 12µF, 14µF and 16µF CBB60s at 450VAC, in lug, flying-lead and core-lead terminals) on our washing machine capacitors page, from NZ$24.95. Tracked NZ delivery: each product page shows the delivery time for that size. If your old capacitor’s label says CBB61 (a flat rectangular box) or CBB65 (a metal can), those types aren’t in our range. Run your numbers through the capacitor finder or contact us and we’ll point you somewhere that does. A washer’s run capacitor is never replaced with a CD60 start capacitor.

If the household can’t wait for a courier, a local appliance parts counter may have the value on the shelf: take the old capacitor and match the printed µF and voltage.

Can you replace a washing machine capacitor yourself?

A washing machine plugs into a socket, so once it’s unplugged the job is mechanical: remove a panel, discharge the capacitor, photograph the wiring and swap two spade connectors. If you’re not confident working on mains equipment, have a registered electrician do it.

Take it carefully either way: unplug at the wall, discharge the capacitor, and photograph the wiring before pulling terminals. If any of that feels beyond you, an appliance technician will do the whole job. The diagnosis you’ve done here will shorten their visit.

Confirmed it’s the capacitor? The full swap, panel screws to test cycle, is in the washing machine capacitor replacement guide, a 30-45 minute job.

Frequently asked questions

Does a Fisher & Paykel SmartDrive have a capacitor?

No. SmartDrive top-loaders use a direct-drive brushless motor with no belt and no motor-run capacitor. If a SmartDrive won’t spin, look at the lid switch, drain pump, or motor controller instead. Buying a capacitor for one is money wasted.

Why does my machine spin only after I push the drum?

That’s a weak capacitor: it has lost enough capacitance that it can’t start the motor from standstill, but keeps it running once something else provides the first rotation. It will usually read well below its labelled µF. Replace it before it strands a full load.

Can I fit a bigger capacitor than the original?

No. Match the µF on the label; within ±5% is fine: a noticeably higher capacitance overheats the motor windings. The one number you can safely increase is voltage: a 450VAC capacitor is a proper substitute for a 400VAC one of the same µF.

How much does a washing machine capacitor cost in NZ?

The common 8-16µF CBB60 sizes start from NZ$24.95 at capacitors.nz, with tracked NZ delivery. Each product page shows the delivery time for that size. An appliance technician doing the same swap will charge a call-out plus labour on top of the part.

My capacitor tests fine, what now?

A capacitor reading within ±5% of its label is very unlikely to be your fault. Move down the list: belt, lid switch, drain pump, brushes if it’s a universal motor, and the control board last. That order runs cheapest to dearest.