LG microwave smells like burning — is it urgent?
A burning smell often means a failing magnetron or a scorched waveguide cover. Right now, unplug the microwave, or switch its breaker off if it is built in, open a window, and leave it off until the technician has seen it. Smoke, a scorch mark, melted plastic, or a smell that carries on with the power off moves this up: a photo that shows wiring a person could touch makes the Triage Profile say EMERGENCY, and the word holds.
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In the next five minutes
Safe first steps, before the call. Nothing here needs a tool.
Smoke or flames: get everyone out and call 911.
No smoke or flames? Stop the microwave and switch off its breaker; don’t touch a hot or melted plug.
Keep the door shut, don’t use it again until it’s checked, and keep people away from it.
Everything else about this problem
Is it an emergency?
Is a burning smell from an LG microwave an emergency?
Treat it as urgent. Turn it off and unplug it or switch off its breaker, and do not use it again until the cause is found. If you see smoke or flames, or smell gas, get everyone out and call 911.
If you manage this unit
Ask the resident
- Does the smell stop when the microwave is off?
- Is there smoke, a scorch mark, or melted plastic anywhere on it?
Say this to your resident
Thanks for telling me about the burning smell from the microwave. Please unplug the microwave, or switch its breaker off if it's built in right now, open a window, and leave it off tonight. If you see smoke or a flame, get everyone out and call 911, then call me. Send me a photo of the microwave with the plug and the panel in shot, and I'll get an appliance technician out.
Who to call
An appliance technician A smell from the plug, the socket or the wall goes to an electrician.
Symptoms & causes
A burning smell often means a failing magnetron or a scorched waveguide cover.
A burning smell from your LG microwave often indicates an internal electrical issue, such as an overheating magnetron, high-voltage transformer, or a failing diode. You might also notice smoke, arcing inside the cavity, or that food is not heating properly despite the microwave running. Sometimes, the smell can be caused by burnt food residue on the waveguide cover or inside the cavity, which is a less severe but still concerning issue.
Questions people ask
Who do I call for a microwave that smells like burning?
An appliance technician. A burning smell often means a failing magnetron or a scorched waveguide cover. A smell from the plug, the socket or the wall goes to an electrician. The Triage Profile names who to call for your photo.
What do I tell the resident right now?
Thanks for telling me about the burning smell from the microwave. Please unplug the microwave, or switch its breaker off if it's built in right now, open a window, and leave it off tonight. If you see smoke or a flame, get everyone out and call 911, then call me. Send me a photo of the microwave with the plug and the panel in shot, and I'll get an appliance technician out.
Why does my LG microwave smell like burning even after cleaning?
If the burning smell persists after a thorough cleaning, it likely indicates an internal component failure, such as a failing magnetron or high-voltage transformer overheating. These parts can emit a burning odor as they degrade, even if the cavity is spotless.
Can a simple spill cause a burning smell in an LG microwave?
Yes, food spills or splatters, especially greasy ones, can burn onto the cavity walls or waveguide cover, producing a strong burning odor.
Related problems
More LG microwave problems
Another symptom on the same microwave.
Smells like burning: other brands
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