The short answer
On a LG dryer, a noise that was not there before usually comes down to worn drum support rollers rather than anything deeper in the machine: rollers wear oval and produce a low rumble that rises with load and follows the drum exactly. That keeps it an owner check first, not a service call. Start here: clear the whole vent run to the outside first, because LG's control reacts to duct restriction and will shorten or stall cycles rather than overheat.
What you are seeing
- A low rumble that rises as the load gets heavier
- A squeal once per drum revolution
- A metallic rattle that carries on briefly after the drum stops
- A scraping that stops the instant the drum stops
- Not this fault: A hum with no rotation, which is a drive fault rather than a noise fault
- Not this fault: A thumping that is really a zip or a buckle in the load, which is not a fault
- Body: LG builds this dryer as a drum carried on rollers with felt seals front and rear, a dual blower path, moisture bars in the drum front and a duct-restriction indicator. That architecture decides which of these you see first.
- Also check note: If these fit better, the fault is a different one.
Likely causes, in order
- Worn drum support rollers — Why this rank: The LG drum rides on rollers rather than a full felt glide, so a dry roller bushing gives a rhythmic thump that speeds up with the drum.
- The vent blower — Why this rank: LG uses a dual blower path, and a wheel working loose on the motor shaft rattles against its housing.
- An object in the blower path — Why this rank: The LG blower path is short and takes coins straight off the drum, which is the cheapest fault here to find.
- A dry idler pulley — Why this rank: The LG idler tensions a single drum belt and squeals once per drum turn when its bushing dries.
- Worn front drum glides — Why this rank: LG's front support is a felt band that wears through and scrapes, stopping the instant the drum stops.
- Body: Ranked for a LG dryer specifically.
What to check, in order
- Body: The order follows the ranking, and the ranking follows the platform. First: turn the drum by hand and listen at the rear. It goes first because the LG drum rides on rollers rather than a full felt glide, so a dry roller bushing gives a rhythmic thump that speeds up with the drum. Second: run the fan alone and listen with the oven not heating. With the first check clean, this is what the LG platform makes next most likely. Third: look into the blower path through the filter opening with a flashlight. Only after those three is it worth reaching for a dry idler pulley: it costs more to get at, and it does not explain the first three coming back clean.
Checks you can make
- Disconnect the duct at the wall and run the dryer on air-fluff. A strong steady flow at the machine with weak flow at the outside hood puts the restriction in the run, not in the dryer. — Tools: screwdriver — Time: about fifteen minutes
- With the machine unplugged, turn the drum slowly by hand through several full turns and listen at the rear. A rumble that follows the drum is the supports; a squeak once per turn is the idler. — Tools: none — Time: about ten minutes
- Pull the lint filter and wipe the two metal sensor bars behind it with a little rubbing alcohol on a cloth. A softener film there is the usual cause of a cycle that stops early. — Tools: cloth, rubbing alcohol — Time: about five minutes
- Open the door and press down and then up on the front of the drum. Movement with a scraping sound is the front supports, which wear before anything at the rear. — Tools: none — Time: about five minutes
- Body: Stop at the first step that would need a meter on live terminals or a sealed assembly opened.
Before you open anything
Safety
Treat a dryer complaint as a fire question first. Heat, lint and restricted airflow are the combination that starts laundry fires. 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 whole duct run, not just the machine end. A restricted duct is the condition behind most dryer heat faults and behind most dryer fires. Never run the machine with the duct disconnected for longer than a brief test, and never vent it into the room.
When to call
The line is not difficulty, it is what the next step costs and risks. Call when: the drum can be moved up and down by hand in a way it could not before
What this page omits
This is generalized information: it ranks causes for the LG dryer range as one platform, not for a single model. Where a page exists for your specific model it is the more specific one and takes precedence over this. The narrower pages below cover the other presentations of this symptom.
Entries: - [LG Dryer: Will Not Start or No Power](/blog/lg-dryer-wont-start-2) - [LG Dryer: Not Heating](/blog/lg-dryer-heating-failure) - [LG Dryer: Water Leak](/blog/lg-dryer-water-leak)
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
