LG lists the sounds an LREL6325 makes that are normal: metal crackling or popping as it heats and cools in cooking and Self Clean, a convection fan that turns on and off by itself, a fan that stops when you open the door during convection cooking and restarts when it is closed, a convection fan that starts a little after preheating begins, elements clicking on and off more often on this tighter-control oven, and a chime whenever a cooktop element is turned on. The fan also keeps running after the oven turns off until the oven has cooled.
Differential
Likely causes of “LG range or oven convection or cooling fan is noisy or not running”, and how to tell them apart
- 1
Normal convection cycling
What separates it The fan turns on and off during a bake cycle
How to confirm Compare with LG's statement that the fan operates periodically to ensure even baking
- 2
Metal expanding and contracting
What separates it Ticking, popping or crackling is heard during preheat and again during cool-down
How to confirm Note that the noise stops when temperatures settle
- 3
A convection mode that starts the fan late
What separates it The fan is silent for the first minutes of Conv. Bake
How to confirm Wait through preheat, since LG says it turns on later
- 4
A fan or motor fault
What separates it A loud grinding, rattle or scraping that is new
How to confirm Turn the oven off and call LG service; stop using convection modes
Before you touch a setting
Record this first — changing settings destroys the evidence
- What the noise sounds like and when it occurs
- Which oven mode is running when the noise starts
- Whether the noise stops when the door is opened
Try in this order
0 of 5 completedIdentify the mode
ReversibleCheck whether Bake, Conv. Bake or Conv. Roast is running. LG says the fan is designed to run only in some modes and cycle within them.
Open the door
ReversibleLG says the convection fan stops when the door opens; if the noise stops, it was the fan and this is expected.
Listen when cooling
ReversibleAfter the oven is turned off the convection fan keeps running until it cools, which LG lists as normal.
Check for loose items
ReversibleRemove loose racks, foil or pans that could rattle against the walls or rear fan cover.
Call if it changes
ReversibleIf the sound becomes louder or different from the normal sounds LG lists, turn the oven off and call service.
Model-specific
What is true of this model and not of its siblings
- Normal sounds
- LG lists these as normal: elements clicking on and off more often on this tighter-control oven, crackling as metal heats and cools, a convection fan that turns on and off by itself, and a chime whenever a cooktop element is turned on.
- Racks and accessories
- The LREL6325 ships with three standard racks where the LREL6323 and LREL6321 have two. The grid, broiler pan and Air Fry tray are optional accessories bought from lg.com.
- Parts for this problem on the LREL6325 (RepairClinic, 2026-09-21)
- pcb assembly, main, part number EBR89295701, at $211.60.
- Other models this page answers
- These steps also fit models LREL6323, LSGL6335, LSIL6336, WCEP6423, WSEP4723.
Stop boundary
When this stops being a self-service repair
- !If a grinding or scraping noise continues after the oven cools, call LG service
- !If a burning smell accompanies the noise, turn the oven off and unplug or shut off the breaker
Evidence ledger
Sources behind this answer
LG's online owner's manual for this model: the Cooking, Parts and Features, Noises and Wi-Fi troubleshooting tables, Lock Out, Self Clean, Settings, InstaView, Warm Zone and LG ThinQ sections.
LG USA support page listing this model's manuals and warranty.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-21.
Exact questions
Common questions
Is a chime normal?+
Yes, one sounds when a surface element is turned on.
Is crackling normal?+
Yes, LG says it is metal heating and cooling in cooking and Self Clean.
Does the fan stop when the door opens?+
Yes, until the door is closed.
Does the fan run after cooking?+
Yes, it keeps running until the oven has cooled down.
Why does the fan start late?+
LG says it may turn on later.
How long does the oven light stay on?+
It turns off after about 90 seconds to save power.
Does InstaView respond to noise?+
Loud noises near the oven can activate it.