Quick Answer: A commercial washer making loud banging is usually suffering from one of five faults: an unbalanced load, an unlevel base, a foreign object, worn suspension or a failing drum bearing. Stop the machine, because repeated impact can crack mounts and shoplot floors. Banging during fill points to pipework instead, while banging at high spin points to balance or suspension.
A commercial washer making loud banging is the call every laundromat owner in Malaysia dreads. The noise frightens customers, shakes the shoplot, and usually means damage is growing. Laundry Sifu covers the seven causes we see most across Klang Valley and Selangor, a fast way to tell them apart, and when to call a technician.
Why Is a Commercial Washer Making Loud Banging During Spin?
Banging during spin means the drum is running off-centre and hitting something solid. At full speed, even a small imbalance becomes a heavy, repeated impact.
The forces involved are large. Electrolux Professional rates its high-spin soft-mount washers at up to 450 G-force of extraction, according to its product sheet. That is why a bunched-up comforter that looks harmless at wash speed can leave you with a commercial washer making loud banging at spin speed.
Spin is also when worn parts give themselves away. A tired damper or loose bolt can hide during tumbling, then fail as the drum accelerates. Note exactly when the bang happens before you touch anything.
How Do You Diagnose a Commercial Washer Banging Noise Fast?
The moment the noise happens points to the cause faster than any tool. Every commercial washer making loud banging follows a pattern, and this table shows it.
| When the bang happens | Most likely cause | First check |
|---|---|---|
| Soon after installation or relocation | Transit bolts left in place | Look at the rear panel for shipping bolts |
| While the washer fills | Water hammer in the inlet pipework | Listen at the valve; check pipe brackets and supply pressure |
| While the drum tumbles | Foreign object or loose drum part | Empty the drum; check pockets and the drain trap |
| While draining | Loose drain pipe or object in the trap | Check pipe clips and the trap |
| During spin ramp-up | Unbalanced load or unlevel machine | Stop, redistribute the load, check levelling |
| Repeating bang at full spin | Worn suspension, loose mounting or bearing | Stop and arrange a technician inspection |
Follow these steps to inspect safely:
- Press stop and wait until the drum has fully stopped.
- Switch off at the isolator and tag it, so nobody restarts the machine mid-check. Never put a hand inside a drum that could still move.
- Remove the load, then check the drum, door seal and pockets for coins, keys and metal fittings.
- Check that all four feet touch the floor and that the machine does not rock.
- Run one short, empty cycle and note exactly when the noise returns.
See the fix in action in our official video: watch our Laundry Sifu video on a commercial washer making loud banging.
What Are the 7 Causes of a Commercial Washer Making Loud Banging?
Seven faults explain most complaints about a commercial washer making loud banging. Work through them in order, from the cheapest check to the most serious.
1. Unbalanced or Oversized Loads
An uneven load is the cheapest cause to fix, so check it first. Heavy single items such as comforters, hotel and homestay bedspreads, langsir (curtains) and floor mats drag weight to one side of the drum.
Underloading can do the same. One wet towel has nothing to balance against, so it thumps once per rotation.
Overloading is the other trap. In busy self-service shops, customers often pack the drum past its rated capacity, which is printed on the data plate. Stop the cycle, redistribute the items and restart with a sensible load.
Demand peaks before Hari Raya and Chinese New Year, when customers bring curtains, carpets and bedding for a big clean. Those bulky loads are the ones that unbalance a drum, so watch your machines closely in those weeks.
2. Unlevel Floor or Loose Anchor Bolts
A rocking washer amplifies every drum movement into the frame and floor. A small gap under one foot is enough to produce a commercial washer making loud banging at full spin.
Malaysian shoplots add local problems. Ground-floor slabs often slope toward the floor trap, so a machine levelled once can drift out of position. Our humid, rainy climate and constant chemical splash also corrode levelling feet and anchor bolts over time.
Upper-floor units and hotel laundry rooms have a different issue, because vibration travels through the building and neighbours or guests feel it. Know your mounting type too. Electrolux Professional says its soft-mount washers remove the need for a concrete platform, while its rigid-mount W5250N manual covers casting a plinth and fitting chemical anchors.
3. Transit Bolts Left In After Installation or Relocation
If a commercial washer making loud banging started in the first week after installation or a move, look for transit bolts. The Electrolux user manual tells owners to remove the packaging and the transit bolts before use.
These bolts lock the drum during shipping. Left in place, they stop the suspension doing its job, so the drum hits the shell instead. Most commercial machines in Malaysia are imported, and kedai dobi owners who move to a new shoplot often relocate them too, so it is an easy step to miss.
4. Foreign Objects in the Drum or Pump
Coins, keys, metal buttons, zips, belt buckles and tudung pins can slip between the inner drum and outer tub. In a commercial washer making loud banging at tumble speed, they usually make a sharp clang rather than a deep thump.
Objects can also reach the drain trap or pump and rattle during drain and spin. Empty the drum, check the trap if your model has an accessible one, and make pocket checks part of your sorting routine.
5. Worn Suspension Springs, Rods or Shock Absorbers
Soft-mount washers let the drum and tub float on springs, rods or dampers. When these wear out, the tub swings further than designed and strikes the cabinet.
Worn suspension is the classic reason a soft-mount commercial washer making loud banging gets worse every month. Typical signs are a bang that grows with heavier loads, a drum that sits off-centre when empty, or noise at ramp-up. Only a technician should test drum travel and rebound, and only with the power isolated.
6. Loose Drum Spider, Shaft, Bearings or Pulley
The spider is the cast piece that joins the drum to the shaft. A cracked spider or loose shaft bolts can produce a deep knock once per rotation.
Failing bearings usually rumble or grind first, then knock as play increases. A loose pulley or motor mount adds a rhythmic thud, and on models with balance weights, a loose weight knocks once per turn.
Humid conditions and chemical splash can shorten seal and bearing life if a leak goes unnoticed. Any commercial washer making loud banging with these symptoms needs a technician before the shaft or tub is wrecked.
7. Water Hammer at Fill or Drain
Not every bang is mechanical. A sharp thud when the inlet valve snaps shut is water hammer: moving water stops suddenly and shocks the pipe.
Loose pipe brackets, high supply pressure and fast-closing valves make it worse. Mains pressure can swing through the day, and shops fed by a roof tank or booster pump often see more of it. Secure the pipework first, then ask a plumber about pressure and water hammer arrestors if the thud continues.
Does the Cause Differ on Electrolux, Speed Queen and Huebsch Machines?
The causes are shared across brands, so a commercial washer making loud banging on any of them starts with the same checks. What changes is the mounting type, rated capacity and parts, so read your model’s manual and data plate before any work.
- Electrolux: As an authorised Electrolux partner, Laundry Sifu first confirms whether the machine is soft-mount or rigid-mount, because the fix differs. Our Electrolux laundry machine service follows the manufacturer’s documents, and Electrolux itself warns that non-professional repair can carry safety consequences and may void the guarantee.
- Speed Queen: Busy self-service shops running Speed Queen washers tend to meet load and levelling problems first. Confirm the rated capacity in the manual, then book our Speed Queen laundry machine service if the noise persists.
- Huebsch: On Huebsch washers with years of heavy use, wear is the more likely story, especially suspension parts and mounting hardware. Our Huebsch laundry machine service team inspects those parts together.
When Should You Stop Troubleshooting a Commercial Washer Making Loud Banging?
Stop and call a technician if the bang returns after you have corrected the load and the levelling. Repeated impact turns small faults into expensive ones.
| Task | Owner or staff | Technician |
|---|---|---|
| Redistribute or reduce the load | Yes | Not needed |
| Remove coins, keys or objects from the drum | Yes, with power isolated | If the object is behind the drum or in the pump |
| Check levelling and feet | Yes, a visual and rock check | Re-levelling heavy machines and anchor-bolt checks |
| Remove transit bolts | Yes, if the manual shows where | If bolts are seized or the location is unclear |
| Tighten loose pipe brackets | Yes | Plumber for pressure or arrestors |
| Suspension, spider, bearings, pulley | No | Yes |
Keep running a banging machine and the damage spreads. Bearings fail, shaft seals leak and mounts crack the floor, while an out-of-service machine earns nothing.
Is Loud Banging Also a Workplace Noise Issue in Malaysia?
It can be, if staff work beside your machines all day. According to DOSH, as reported by People Matters, the 2019 noise regulations require employers to provide hearing protection and annual hearing assessments once exposure reaches 82 decibels averaged over an eight-hour shift.
DOSH’s deputy director-general has also said that employers who skip noise risk assessments, ear protection or hearing tests for workers exposed above 85 decibels can face a fine of up to RM10,000, up to a year in jail, or both, as carried by Asia News Network.
A single commercial washer making loud banging rarely reaches those levels alone. A row of vibrating machines in a small shoplot can add up, so measure the noise and fix the source rather than relying on ear protection.
How Can You Prevent a Commercial Washer Making Loud Banging?
Prevention comes down to load control, regular checks and early servicing. Build these habits into your weekly routine:
- Display the rated capacity and a “no single heavy items” sign on every machine, in English and Bahasa Malaysia.
- Check pockets and sort out metal items before loads go in.
- Weekly: check that each machine sits level, and note any new sounds.
- Monthly: inspect anchor bolts, levelling feet and pipe brackets for corrosion or movement.
- Before festive seasons: brief your staff on bulky loads such as curtains, carpets and comforters.
- At every service: have suspension, bearings, belts and mounts inspected.
This is where commercial laundry service pays for itself. Laundry Sifu maintenance contracts cover washers, dryers, boilers and water systems, and contract customers get a free 10-point health check.
Our Learning Centre also hosts new videos on common commercial laundry machine problems, so your team can recognise warning sounds early.
FAQ: Commercial Washer Banging Questions
Is it safe to keep running a commercial washer making loud banging?
No. Stop the machine, isolate the power and find the cause first. Continued impact can damage bearings, seals, the tub and the floor, and a repair is cheaper than a replacement.
Why is my commercial washer making loud banging only on high spin?
High-speed spin is when imbalance and worn suspension show up. Redistribute the load and check levelling first. If it repeats on a correctly loaded, level machine, book an inspection of the suspension, mounts and bearings.
Can an unlevel floor cause a commercial washer making loud banging?
Yes. A rocking machine amplifies drum movement into the frame and floor. Re-level all four feet, check anchor bolts on rigid-mount models, and re-check after any floor work or relocation.
How do I stop banging when my commercial washer fills with water?
That is usually water hammer, not a drum fault. Secure loose pipe brackets, check supply pressure, and ask a plumber about water hammer arrestors if it continues.
How much laundry is too much for a commercial washer?
Anything above the rated capacity on the data plate. Underloading with one or two heavy items is a problem too, because they cannot balance against each other.
Who can inspect a banging commercial washer in Selangor and Klang Valley?
Laundry Sifu is based in Balakong, Selangor, and services commercial laundry machines across Klang Valley and Selangor. Call during office hours, Monday to Friday, 9am to 5pm.
What Should You Do Next?
Test your noisiest machine against the diagnosis table today. If your commercial washer making loud banging still bangs after a corrected load and a level check, stop using it. Call Laundry Sifu on +60-11-5872-4533 (Monday to Friday, 9am to 5pm, closed Saturday and Sunday) and we will inspect it before the damage spreads.
