LG dishwasher making a loud noise — how urgent is it?
Commonly a worn wash-pump bearing, a cracked spray arm, or debris in the chopper area. Right now, switch the dishwasher off at the breaker: a grinding, scraping or banging noise usually means a part is rubbing or has come loose, and each run makes the repair bigger. A burning smell with the noise, sparks, or smoke moves this up: a photo that shows wiring a person could touch makes the Triage Profile say EMERGENCY, and the word holds.
Show us the dishwasher.
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In the next five minutes
Safe first steps, before the call. Nothing here needs a tool.
Note what the noise sounds like and when it happens, then turn the dishwasher off and switch off its breaker.
Take a photo of the dishwasher and any code on the display, without opening anything.
If you can read its label without moving it, note the brand and model number for the call.
Everything else about this problem
Is it an emergency?
Is a loud noise from an LG dishwasher an emergency?
Usually not an emergency. A grinding, rattling or humming that has just started most often comes from a fan, motor, belt or loose panel. Stop using it and cut the power if the noise comes with a burning smell, smoke or sparks.
If you manage this unit
Ask the resident
- Does the noise only happen while it is running, or also when it is idle?
- Is there any smell of burning with it?
Say this to your resident
Thanks for telling me about the noise from the dishwasher. Please switch the dishwasher off at the breaker and leave it off for now: a loud noise usually means a part is rubbing or has come loose, and running it makes the repair bigger. If there's a burning smell with it, tell me straight away. Send me a short video with the sound and a photo of the dishwasher, and I'll get an appliance technician out.
Who to call
An appliance technician Send the technician the video with the sound: it shows them where to start.
Symptoms & causes
Commonly a worn wash-pump bearing, a cracked spray arm, or debris in the chopper area.
Loud noises in an LG dishwasher often manifest as grinding, humming, buzzing, or clunking sounds during wash cycles, indicating internal mechanical stress. These noises typically point to issues with the wash pump motor, circulation pump, drain pump, or foreign objects obstructing the impeller. A failing spray arm bearing or a worn-out motor bearing can also contribute to excessive noise, signaling a need for immediate inspection.
Questions people ask
Who do I call for a dishwasher making a loud noise?
An appliance technician. Commonly a worn wash-pump bearing, a cracked spray arm, or debris in the chopper area. Send them the video with the sound: it shows them where to start. The Triage Profile names who to call for your photo.
What do I tell the resident right now?
Thanks for telling me about the noise from the dishwasher. Please switch the dishwasher off at the breaker and leave it off for now: a loud noise usually means a part is rubbing or has come loose, and running it makes the repair bigger. If there's a burning smell with it, tell me straight away. Send me a short video with the sound and a photo of the dishwasher, and I'll get an appliance technician out.
Why is my LG dishwasher making a grinding noise?
A grinding noise often indicates a foreign object, like a piece of glass or food debris, is caught in the wash pump impeller or the drain pump. It could also signal a failing wash pump motor bearing.
Can a loud humming noise be fixed easily?
A humming noise, especially during draining, might be a failing drain pump struggling to operate or a blockage within the drain hose.
What if the noise sounds like rattling or clunking?
Rattling or clunking often points to loose items inside the dishwasher, a spray arm hitting dishes, or a worn-out spray arm bearing.
Related problems
More LG dishwasher problems
Another symptom on the same dishwasher.
Making a loud noise: other brands
Guides and hubs
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Drop it in the box at the top. The Triage Profile says what it is, how urgent, who to call and what to say. Email the Triage Profile to yourself or share its link with the resident.