A dryer tells you what is wrong by the sound it makes. Thumping means worn drum rollers. Squealing means the idler pulley. Grinding means metal on metal and you should stop using it. Rattling is usually a coin in the blower wheel, and scraping is worn drum glides. Below is how to read each one, how to split the machine in half with a two minute test, and what the repair costs in Boston. Call (617) 778-2904 for same day dryer repair.
A dryer should be a low, steady rumble you stop noticing. When it starts thumping or screeching, something inside is rubbing where it should not be, and the type of noise narrows it down to one or two parts almost every time. Dryers are simple machines. Learn to read the sound and you have done most of the diagnosis before anyone opens the cabinet.
One thing to rule out first, because it is the cause more often than people expect. Empty the drum completely and run it for a minute. Shoes, belt buckles, a coin left in a pocket: a fair share of broken dryer calls end right there. If the noise disappears with an empty drum, you were chasing a sneaker.
Thumping or rhythmic banging
A steady thump that keeps time with the drum turning is almost always worn drum support rollers. The rollers cradle the drum and let it spin. Over years they wear flat on one side, so every rotation drops the drum onto that flat spot. Thump, thump, thump, in time with the tumbling.
They are cheap parts and they wear as a group, so they get replaced as a full set, never one at a time. A deeper rolling rumble rather than a sharp knock points the same way, or occasionally to a tired rear drum bearing.
There is a Boston version of this one worth checking before you buy parts. A lot of laundry in this city sits on a hundred year old floor that is no longer level, in a closet or a basement corner where nobody ever put a level on the machine. An unlevel dryer rocks on its feet and knocks against the cabinet in a way that sounds exactly like a bad roller. Put a level on top, adjust the feet until it sits flat and does not rock when you push a corner, and run it again. If the knock is gone, you just saved yourself a repair.
Squealing or screeching
A high, sharp squeal is the idler pulley nine times out of ten. It is a small spring loaded pulley that keeps tension on the drive belt, and its wheel spins the entire time the dryer runs. When the bearing inside it dries out, you get the nails on a chalkboard noise. It is one of the cheapest parts in the whole machine and one of the most common things we replace.
If a new idler pulley does not fully silence it, the next suspects are the drum rollers and a dry rear drum bearing, which can both squeal as well as thump.
Grinding
Grinding is coarse, metallic, and the one noise on this page we would tell you to stop on. It means metal is running against metal: badly worn rollers, a failing rear drum bearing or shaft, or something jammed in the blower wheel. Running a grinding dryer until the weekend is how a cheap roller set turns into a bearing and shaft job. Unplug it and book the repair.
Rattling or clanking
A loose rattle usually means something small has worked its way past the lint screen slot and into the blower wheel, where it clatters around every cycle. Coins, buttons, hairpins, the little plastic tag off a new shirt. The fix is finding and removing it, usually through the lint screen housing or a lower panel. A cracked or loose blower wheel makes a similar noise and needs replacing rather than cleaning out.
Scraping
A dragging, scraping sound is normally the drum glides, the felt and plastic pads the front of the drum rides on, or a worn felt seal. As they wear thin the drum starts touching the cabinet. They are inexpensive, and replacing them takes the scrape out immediately.
The belt off test, which splits the machine in half
This is how a technician narrows it down in two minutes, and you can do it yourself. Unplug the dryer, open the cabinet, slip the drive belt off the drum, then turn the drum slowly by hand.
That single test rules out half the machine. If the roughness is there while you turn the drum with your own hands, the fault is in the parts holding the drum up. If the drum turns smooth and silent but the dryer screams when running, the noise lives with the motor, the idler or the blower instead.
Why one loud dryer is a bigger problem in Boston
In a single family house a noisy dryer is an annoyance. In the housing stock most of this city actually lives in, it is a neighbour problem.
Stacked laundry in a hallway closet sits against a shared wall with no isolation around it, and a closet full of hard surfaces behaves like a drum of its own. In a three decker, a thumping dryer on the second floor is audible in the units above and below it, and the complaint usually arrives before the repair does. We get calls in Somerville, East Boston and Brighton that start with a neighbour asking them to stop using it at night rather than with the noise itself.
Two practical things follow. Level the machine first, because an unlevel dryer transmits far more into the structure than a level one. And if you are a landlord with coin op machines in a basement, a squeal nobody reports for six months becomes a seized bearing, which is the difference between a small repair and a replacement. We handle multi unit laundry for property managers across Greater Boston on one invoice.
Do the cheap parts together while it is open
The drive belt, the idler pulley and the drum rollers all wear on the same timeline and all live in the same part of the machine. Getting to any one of them means most of the work of getting to all three. So when we are in there for a squeal, we look at the belt and the rollers too, and we will tell you if they are close to going. Doing them in one visit is not an upsell, it is the difference between one repair and three.
What a noisy dryer repair costs
Our diagnostic is $125 and it is waived when you approve the repair, so an approved job costs the repair price and nothing more.
| Job | All in, parts and labor |
|---|---|
| Belt, rollers or idler pulley | $170 to $290 |
| Drum glides or front felt seal | $160 to $270 |
| Blower wheel, or removing a jammed object | $170 to $300 |
| Rear drum bearing and shaft | Quoted on the machine, and sometimes not worth doing |
Noise repairs are nearly always worth doing. These are inexpensive wear parts on a machine that is otherwise fine. The one exception is a failed rear bearing on a dryer well past a decade old that is also struggling to dry, and in that case we will say so rather than sell you the job. The wider picture is in our Boston appliance repair cost guide and our repair or replace guide.
While you have the dryer pulled out
You are already behind the machine, so check the vent. A crushed transition hose or a blocked duct will not make noise, but it is the most common reason a Boston dryer needs two cycles, and it is what kills heating elements. If yours has been taking longer than it used to, read what to do when a dryer runs but will not heat, and if you have smelled anything burning, stop and read what each burning smell means before you run another load.
The short version
Thump means drum rollers, after you have checked the machine is level. Squeal means the idler pulley, then rollers or the rear bearing. Grinding means stop. Rattle means something loose in the blower wheel. Scrape means worn glides. Empty the drum first to rule out a shoe, use the belt off test to cut the machine in half, and replace the cheap wear parts together rather than one at a time.
Common questions
Why is my dryer making a loud thumping noise?
Usually drum support rollers that have worn flat, dropping the drum once per rotation. Before buying parts, put a level on the machine: on an old Boston floor an unlevel dryer rocks and knocks in a way that sounds identical to a bad roller.
What makes a dryer squeal or screech?
The idler pulley almost always. Its bearing dries out and squeals as the belt runs across it. It is one of the cheapest parts in the machine. If a new one does not silence it, worn drum rollers or a dry rear drum bearing are next.
Is it safe to keep using a noisy dryer?
A squeak or a thump is usually safe for a short while, though it will get worse. Grinding is not: that sound is metal on metal and the part is destroying itself, which turns a cheap repair into an expensive one. Unplug a grinding dryer and book it.
Why does my dryer rattle?
Normally a coin, button or hairpin that slipped past the lint screen and ended up in the blower wheel, where it clatters every cycle. Removing it fixes it. A cracked blower wheel sounds similar but has to be replaced.
Can a dryer be noisy just because of where it sits?
Yes, and in this city it often is. A stacked unit in a closet, or any dryer on an uneven hundred year old floor, transmits far more noise into the building than the same machine sitting level on a solid floor. Level it before you assume a part has failed.
How quickly can you fix it?
Belts, rollers, idler pulleys and glides are stock parts on the van, so most noise repairs are done in one visit. Call before noon and in most of Greater Boston we are there the same day.