The short answer
On a Marathon dryer, a new noise is most often an exhaust flap or loose ducting rattling rather than a coin, a stud or a pen inside the drum or the blower. The airflow path and the blockages in it come first on a compact machine, because its exhaust run is short and every restriction in it counts double. All three checks below are owner work, and not one of them needs a part.
What you observe
- A rattle that rises and falls with the fan — Anything tracking fan speed belongs to the blower.
- The machine rocks or walks slightly while running — A rocking cabinet is a levelling problem before it is anything else.
- A rhythmic thump slow enough to count — One beat per drum revolution is the signature of a flat on a roller.
- NEAR MISS — noise and the clothes are not drying — Noise with poor drying is a heating or airflow fault on that page.
What goes wrong here, in order
- An exhaust flap or loose ducting rattling — The flap at the outside vent chatters in the airflow, and a length of flexible duct that has come unclipped will drum against the wall behind the machine. Neither is the dryer's fault. It leads because the noise is outside the machine entirely, and that is worth establishing before anything is opened. The machines are chosen for tight spaces, so they are usually boxed in on at least two sides.
- A blower wheel clogged or loose on its shaft — The blower moves the air. Lint packed into its vanes unbalances it, and a wheel that has worked loose on the shaft gives a rattling or scraping noise that rises and falls with the fan speed. It sits here because it explains noise that arrived alongside slower drying.
- A coin, a stud or a pen inside the drum or the blower — Small hard objects escape pockets and either roll round the drum or find their way into the blower housing, where they rattle against the fan on every revolution. It is last because the drum is empty and the noise persists.
The order to check in
- Go outside and listen at the vent while it runs — A chattering flap is obvious from outside and silent from in. First, because it is the likeliest to end the job.
- Compare the noise with recent drying times — A packed blower is slower and noisier at the same time. Second, once that is clean.
- Empty the drum, turn it by hand and listen — Anything loose makes itself known in one slow revolution. Third, and by now the answer is usually in hand.
The owner-side checks
- Free the flap and re-clip any loose ducting — Do this from outside where it is reachable rather than behind the machine.
Tools: screwdriverAbout 20 min
- Clear the filter and the duct, then listen again — A clean airflow path sometimes takes the noise with it.
Tools: vacuum, brushAbout 30 min
- Empty the drum and check the filter housing and the lip — Turn the drum slowly by hand with the machine unplugged.
Tools: torchAbout 15 min
- STOP — describe the noise and when it happens — A described rhythm is worth more to a technician than a guess at a part.
Safety first, and it is not a formality
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off. Clear the lint duct while you are at it: a restricted duct traps heat against a heat source, and that is how dryer fires start.
When to call a technician
Call when the noise is a rhythmic thump, a squeal that will not clear, or a constant scrape — all three are inside the cabinet. Loose objects, levelling, the filter and the outside flap are owner work and account for a good share of these calls. On this brand the brand has a real parts channel behind it, which makes a proper diagnosis worth the effort.
The closest pages to this one
What is not on this page
This page is written for the appliance class, not for one Marathon model line. Where a family- or model-specific page exists it is the better answer and it is linked below — go there first if your model is named. Not here: roller and belt sizes, seal profiles, cabinet teardown order, or part numbers.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
