LG Refrigerator: Making Loud Noise
Quick answer: Refrigerators normally hum, click, and gurgle, but a new loud buzzing, grinding, rattling, or squealing points to a worn fan motor, a fan blade hitting ice or debris, a failing compressor or start relay, a rattling drain pan, or a vibrating water inlet valve.
- Unplug the refrigerator before reaching toward any fan blade.
- The compressor housing gets hot enough to burn; let it cool before touching it.
- Do not run the unit with panels removed longer than needed for a test.
Why is my refrigerator making a loud noise?
Refrigerators normally hum, click, and gurgle, but a new loud buzzing, grinding, rattling, or squealing points to a worn fan motor, a fan blade hitting ice or debris, a failing compressor or start relay, a rattling drain pan, or a vibrating water inlet valve. Where the noise comes from tells you most of what you need to know: inside the freezer means the evaporator fan, at the bottom rear means the condenser fan or compressor.
Our fitment data covers 1,515 LG refrigerator models and 3,032 LG refrigerator parts, so the part links below are filtered to this brand; always confirm your model number before ordering.
Most Likely Causes, in Order
1. Evaporator fan motor
Worn bearings make the evaporator fan chirp, squeal, or grind, and the noise gets louder with the door closed and quieter when it is opened.
How to check: Open the freezer door; the noise usually stops because the door switch cuts the fan. Press the door switch and listen; if the loud noise returns, it is the fan. Remove the rear freezer panel and check for ice on the blade or a wobbly motor shaft.
Fix: Clear ice from the blade; if the motor itself is noisy, replace it. (Difficulty: Moderate)
Matching LG parts:
- LG Refrigerator Evaporator Fan Motor 4681JB1027C — $48.77 – $121.91 · 246 models
- Refrigerator Evaporator Fan Motor 4681JB1027J — $86.77 – $108.85 · 188 models
- Evaporator Fan Motor 4680JK1002B — $179.44 · 158 models
2. Condenser fan motor
The condenser fan at the bottom rear runs whenever the compressor does; a worn bearing or debris in the blade makes a rattling or buzzing sound.
How to check: Pull the unit out and remove the rear access cover. Look for dust, paper, or a loose blade; spin the blade by hand and feel for roughness.
Fix: Clean the blade and housing; replace the motor if it feels rough or wobbles. (Difficulty: Moderate)
Matching LG parts:
- Refrigerator Condenser Fan Motor EAU65058502 — $71.87 – $104.62 · 62 models
- LG Refrigerator Condenser Fan Motor EAU64843805 — $104.62 · 10 models
- Kenmore Refrigerator Condenser Fan Motor Bracket MEA42772905 — $189.62 · 10 models
3. Compressor or start relay
A worn compressor knocks or rattles, and a failing start relay clicks loudly every few minutes as the compressor tries to start.
How to check: Listen at the compressor. A click every two to five minutes followed by silence means the relay or overload is tripping. Constant knocking that changes when you press on the compressor mounts is internal wear.
Fix: Replace the start relay; a knocking compressor needs a technician. (Difficulty: Advanced)
Matching LG parts:
- Refrigerator Compressor Overload and Start Relay EBG60663207 — $67.71 – $85.75 · 72 models
- Refrigerator Compressor Start Relay and Overload Assembly CLS30820101 — $160.26 – $178.00 · 52 models
4. Drain pan or loose panels
A drain pan that has shifted, or a loose rear cover, vibrates against the compressor or frame.
How to check: Press on the drain pan, rear cover, and grille while the unit runs; if the noise changes, that part is loose.
Fix: Reseat the pan and tighten or reposition loose covers. (Difficulty: Easy)
No LG part for this cause is in our catalog yet; search by your model number.
5. Water inlet valve
A valve with a worn diaphragm buzzes loudly or hammers when the ice maker fills.
How to check: Note whether the noise happens only for a few seconds when the ice maker fills. Check that water pressure is adequate and the supply line is not kinked.
Fix: Replace the water inlet valve. (Difficulty: Moderate)
Matching LG parts:
- LG Refrigerator Water Inlet Valve 5221JB2010G — $175.44 – $201.43 · 361 models
- Water Inlet Valve Assembly AJU74532703 — $111.18 – $138.55 · 354 models
- LG Refrigerator Water Inlet Valve AJU72992601 — $94.06 – $138.56 · 342 models
6. Defrost heater
A sizzling or popping sound during the defrost cycle is the heater melting frost; a loud crackle can mean heavy frost from a defrost failure.
How to check: A brief sizzle a couple of times a day is normal. If it comes with frost on the back wall of the freezer or poor cooling, check the defrost system.
Fix: No fix is needed for a normal sizzle; repair the defrost system if frost is heavy. (Difficulty: Easy)
No LG part for this cause is in our catalog yet; search by your model number.
Other LG parts the catalog tags for this symptom
- MOTOR,DC EAU61723501 — $84.53 – $164.49 (noisy operation; not circulating air; not cooling)
- Refrigerator Defrost Heater 5300JK1005K — $81.41 – $121.92 (frost in freezer; ice buildup; not defrosting)
- Refrigerator Heater Sheath 5300JB1092D — $101.04 – $189.60 (frost in freezer; ice buildup; not defrosting)
- HEATER,SHEATH MEE62105217 — $95.46 – $121.92 (frost in freezer; ice buildup; not defrosting)
Popular LG refrigerator models
Confirm the model number on the rating plate before ordering. Each model page lists every compatible part.
Frequently Asked Questions
Which noises are normal?
A soft hum, an occasional click when the compressor starts or stops, gurgling refrigerant, and a brief sizzle during defrost are all normal.
Why does the noise stop when I open the door?
The door switch turns off the evaporator fan; if the noise stops, the fan or ice on its blade is the source.
Is a loud compressor dangerous?
Not immediately, but a knocking compressor is close to failing. Plan for repair or replacement and do not ignore a burning smell.
When to Call a Professional
Call a technician if the compressor knocks, clicks repeatedly with a burnt smell, or trips the breaker; compressor and sealed-system repairs require refrigerant handling and are not DIY.