In one paragraph
Squeals, thumps and grinding from a dryer come from four places — the drum rollers, the idler pulley, the belt and the blower — and each has a distinct sound and a distinct hand test. On a Aviva dryer the order below is what makes this page worth reading — the causes are ranked for this kind of machine, not listed alphabetically.
What you observe
- A rhythmic thump once per drum revolution — A flat spot on a roller, or something stuck to the drum. It matches drum speed rather than motor speed.
- A high squeal that rises and falls with the cycle — Idler pulley or a glazed belt. It typically appears when the machine is cold and eases as it warms.
- A rattle or ticking that changes when the drum is loaded — Something in the blower housing — a coin or a button that got past the lint screen.
- Deep grinding that gets worse over weeks — Roller or bearing wear, and it does not recover.
- NEAR MISS — a loud hum with no drum movement — That is a start or belt fault, not a noise fault. Turn the drum by hand to tell them apart.
Causes, most likely first
- Worn drum support rollers — First. The drum rides on plastic or rubber-tyred rollers that flat-spot and seize with age, and they carry the whole drum weight — which is why they produce the loudest and most rhythmic noises.
- Idler pulley or tensioner wear — Second, and it is the classic squeal: a small pulley holding belt tension with a plain bearing that dries out. It is inexpensive and it is often replaced alongside the belt.
- Debris in the blower housing — Third. Coins and buttons get past the screen and rattle in the blower wheel; the sound is metallic and changes as the wheel speed changes.
- Glazed or damaged belt — Fourth. A belt that has hardened slips and squeals under load, especially on a heavy cold load, and its noise is load-dependent in a way roller noise is not.
Where to start, and why there
- Turn the drum by hand with the machine off — Roughness, notchiness or a grinding you can feel through the drum is a roller verdict without any dismantling.
- Note whether the noise tracks the drum or the motor — Once-per-revolution noises are drum-side; faster, constant noises are blower-side.
- Run the machine briefly empty — An empty drum removes the load variable, and a noise that disappears empty is a belt or balance issue.
What an owner can safely check
- Check the machine is level and standing firm — A dryer rocking on an uneven floor amplifies every internal noise and adds some of its own.
Tools: spirit level, adjustable wrenchAbout 20 min
- Inspect the drum interior for trapped objects — Check the lifters and the gap at the drum front. A coin wedged in a lifter makes a very convincing bearing noise.
Tools: flashlightAbout 15 min
- Clean the lint screen housing and the accessible blower path — A vacuum down the screen slot recovers a surprising number of the objects making the noise.
Tools: vacuumAbout 20 min
- Turn the drum slowly through several full revolutions — Listen for a repeating catch and note where in the rotation it falls. That maps directly to a roller.
About 10 min
- STOP before removing the drum — Rollers, idler and belt all live behind the front or rear panel, and reaching them means dismantling the machine.
The safety boundary on this repair
Safety
Disconnect the appliance before removing the back or the front panel, and give the drum a moment to stop entirely. The heater and its thermal cut-outs are wired in the hottest part of the cabinet, so the wiring insulation there gets brittle with age — inspect it while you are inside, and replace anything cracked rather than taping it.
When to call a technician
Call when the drum feels rough or notchy turned by hand, because that is a roller or bearing verdict and it only gets worse — a seized roller will wear a flat onto itself and then start scoring the drum. Call promptly for any grinding noise: unlike a squeal, grinding means two metal parts are already in contact, and continuing to run the machine converts a cheap parts job into a drum replacement.
Nearby pages
Scope of this page
This page is generalized across the Aviva dryer line: it covers the appliance class rather than one family or one model line. Where a family- or model-specific page exists for your unit it is the better answer and it is linked from this page — check the model label before you rely on anything here. What is deliberately not on this page: wiring colours, board part numbers, torque figures and teardown order, all of which differ by family and belong on the page for that family.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
