The short answer
A new noise from a vented dryer points first at one thing: the idler pulley is squealing. Next on the list: the drum glides or the felt seal have worn through. Before anything else, work out whether the noise tracks the drum turning or the motor running — that single observation splits the list in half.
What you observe
- A sound the machine did not make when it was new — Note whether it is fast or slow before anything else.
- A high squeal that is worst at the start of a cycle — Temperature-dependent noise points at a dry bearing.
- A rasp or scrape once per drum rotation — Rotation-linked noise comes from the drum, not the motor.
- A hard metallic clatter, fast and irregular — Nothing that wears sounds like loose metal.
- NEAR MISS — a soft rush of air with no mechanical sound — That is the blower doing its job. Nothing to fix.
Causes, most likely first on this machine
- The idler pulley is squealing — First here because the idler holds the belt in tension for every hour the machine runs, and its bush is a plain bearing with no way to lubricate it. When it dries out it squeals — a high, steady note that rises as the machine warms and often fades once it is hot.
- The drum glides or the felt seal have worn through — Ranked here because the glides are the fastest-wearing parts in the drum and the noise they make is very distinctive.
- Something is loose in the drum or the blower — Ranked here because it is startling, harmless for a short while, and free to confirm.
- The machine is not sitting level — Last, and a spirit level settles it in minutes.
Check in this order, and why
- Note whether the squeal changes as the machine warms up — A dry bush squeals cold and often quietens hot.
- Note whether the noise tracks drum rotation or motor speed — Glides track the drum; a pulley tracks the motor.
- Listen for a hard clatter at motor speed rather than drum speed — A loose object rattles fast; a worn part rasps slowly.
- Push each corner and feel for rock — A cabinet that rocks at rest knocks under load.
What an owner can safely check
- Decide whether the noise is fast or slow — The drum turns slowly and the motor turns fast; the noise belongs to one of them.
About 10 min
- Run a short cycle and listen as the machine warms — Record whether the squeal fades, holds or worsens.
About 20 min
- Turn the drum by hand and listen for a scrape at one point — Report where in the rotation it happens.
About 10 min
- Check the drum and the lint housing for loose objects — Empty pockets before washing prevents the whole class.
Tools: torchAbout 15 min
- STOP HERE if the noise survives every check above — Glides, an idler or a blower mean the cabinet comes apart. Service call.
Before you open anything
Safety
Unplug the machine or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off, and a dryer that has just cut out on temperature is hot inside long after it is silent. A thermal fuse is a safety device, not a consumable. Never bridge one to keep the machine running, and never replace one without clearing the restriction that blew it.
When to call a technician
Call once the machine is level, the duct is clipped clear and nothing loose is in the drum, and a rasp, squeal or rattle is still there. That means the cabinet comes apart. Call immediately if you hear metal grinding on metal, or if the noise arrived with a burning smell — a seized idler can scorch a belt in minutes.
Nearest pages of this class
What this page does not cover
This page is written for the brand and the machine class, not for one family or model line. Where a family- or model-specific page exists for your machine, it is the more specific answer. Deliberately absent: fuse ratings, duct diameters, element and thermostat part identifiers and wiring colours, which differ between the electric and gas-heated families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
