The short answer
A new noise from a OSVO dryer is most often coins, buttons or a stray tool in the drum or the blower. On a machine running long hours the wear items announce themselves clearly, and each has its own sound. This is a commercial machine, built for a duty cycle a household unit never sees, and that is what sets the order below. These run in a commercial laundry or a shared laundry room, back-to-back all day, often on a shared exhaust duct with other machines.
What you observe
- A hard rattle throughout the cycle — Usually something that came out of a pocket.
- A low rumble that rises with drum speed — The classic wear item on a machine running long hours.
- A thump once per drum revolution — Belt rather than bearing.
- A squeal or chirp that is continuous — A dry idler pulley rather than the drum.
- NEAR MISS — the noise is coming from the machine next to it — In a bank of machines that happens constantly; confirm which cabinet before opening one.
Causes, most likely first on this platform
- Coins, buttons or a stray tool in the drum or the blower — First, because it is the most common and the quickest to find: anything that gets past a pocket ends up either tumbling with the load or in the blower housing, where it rattles hard and continuously. On a commercial machine it is a daily occurrence. Running back-to-back all day on a shared exhaust, this machine reaches this state in weeks rather than years.
- Drum support rollers or glides worn — Ranked second because it is the classic wear item on any machine that runs long hours: a low rumble that rises with drum speed and is there throughout the cycle. It gets steadily worse and it is a routine repair.
- The belt or the idler pulley — A glazed belt thumps once per drum revolution; a dry idler squeals or chirps continuously. Both are cheap parts and both are reached from the same panel.
Check in this order, and why
- First: turn the empty drum by hand and listen, then check the blower — First, because it is the most common and the quickest to find. On a machine running back-to-back on a shared exhaust, this is the check that fits the duty.
- Second: note whether a low rumble runs through the whole cycle — That character is the classic wear item on a machine running long hours.
- Third: note whether it thumps once per revolution or squeals continuously — The two sounds separate the belt from the idler.
What an owner can safely check
- Turn the empty drum by hand and listen — First, because a coin or a button is the most common and the quickest to find.
About 10 min
- Note whether it thumps once per revolution or rumbles continuously — The two characters separate a belt from the drum rollers.
About 10 min
- Open the door mid-cycle and listen as the blower stops — A noise that stops with the blower is the blower; one that continues is not.
About 10 min
- STOP HERE before opening the cabinet — Rollers, belts and the blower are all behind panels that also carry mains wiring and, on a gas machine, the burner.
Before you open anything
Safety
Switch the machine off at its breaker before opening a panel, and on a gas machine close the gas valve as well. Lint is the hazard that matters here: a restricted duct is both the most common cause of a heating fault and the reason dryers start fires, so clear it to the outside rather than just to the first bend. If you smell gas: do not switch anything on or off, leave the building, and call the gas utility or your local emergency number from outside. Do not look for the leak yourself.
When to call a technician
Call when the drum is empty of foreign objects, the machine is level and clear of its neighbours, and the noise is still there. Rollers, belts and idlers are routine repairs and worth doing. A deep grinding that is worst under load is a rear bearing, and that is the one where the cost of the repair deserves a conversation first.
Nearest pages of this class
What this page does not cover
Read this as the class-level answer. It stops short of anything that changes model to model — connector pinouts, electrical test values, the sequence for pulling a panel and all part numbers — because getting those wrong is expensive. A family or model page, where one exists, is linked among the siblings and takes precedence over this page.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
