The short answer
On a Black+Decker BCW dryer the useful question about a noise is what it tracks: a thump once per drum turn is the drum path, a squeal that rises with the motor is the belt or a pulley, and a rattle that changes with the load is something loose in the drum or the blower. On these models the drum supports lead. Stop the machine for any burning smell rather than diagnosing through it. Settle the build before the ranking applies: these models divide on a duct to an outside hood.
What you observe on these models
- A thump once for every turn of the drum — Count it against the drum and you have already halved the list.
- A squeal or chirp that rises with the machine — It usually gets worse over weeks rather than arriving overnight.
- Metallic clatter, especially on start — It often changes completely when the load changes.
- A scrape or grinding that does not change with the load — The drum is running on something it should not be, and that is a stop-now noise rather than a book-it-later one.
- A low roar that used to be a hum — Slow arrival is characteristic of wear rather than damage.
- NEAR MISS — a buzz with no drum movement at all — That is a start or belt fault and belongs on the page for a machine that will not start.
Causes, ranked for the BCW build
- Drum rollers, glides or the drum seal are worn — It leads on these models because the supports carry the whole drum and wear slowly enough that the noise arrives as a gradual rumble nobody acts on.
- The belt or the idler pulley is worn or riding badly — It ranks just under the supports because the two are reached in the same teardown, so a technician checks both.
- Something hard has reached the blower wheel — It is ranked by how fast it can be proved: it either rattles or it does not.
- The machine is out of level, or on an unstable floor — It is placed here because it is free to check and it explains a surprising share of complaints on stacked and cupboard installations.
- The motor or its bearings — It comes last deliberately: every cause above is likelier, cheaper and audible from outside.
Check in this order, and why
- Listen for whether the noise syncs with the drum turning — Do it first, because everything below is ordered by the answer.
- Turn the drum by hand with the machine off — Power off first. Roughness, drag or a drum that lifts too easily all point at the supports.
- Check the lint path and the filter housing — Coins and pins collect at the bottom of the housing and are the usual cause of a hard rattle.
- Rock the cabinet and check the feet — Free, fast and worth doing before anything is opened.
Before you open anything
Safety
Power off first — unplug it, or trip the breaker where the machine has its own circuit. A standard household branch circuit is 15 A or 20 A at 120 V, and a large appliance circuit is typically 30 A or higher at 240 V, so an electric dryer usually has two poles to switch and both matter.
When to call a technician
The line falls at the cabinet panel. Clearing the lint housing, levelling the feet and emptying pockets are owner work and account for most rattles. Rollers, glides, the idler pulley, the belt and the motor are not — they need the machine opened, and the noises that come from them get worse rather than better with use. Book the call while it is still a noise rather than a breakdown.
Other faults covered for the BCW models
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
