Microwave smells like burning

Symptoms

• Acrid or burning smell during or after use
• May include light smoke
• Could be food-related or electrical/plastic in nature
• May have started suddenly or built up over repeated uses

Likely causes

• CommonFood residue or spills burning onto interior surfacesSplatters left inside continue to burn every time the microwave is used.
• CommonOverheated food item catching or scorchingCertain foods left in too long can scorch and smell strongly.
• PossibleOverheating internal componentA failing magnetron, transformer, or wiring issue can produce an electrical burning smell.
• PossibleMelted plastic containerA container not rated for microwave use can partially melt and smell strongly.

What to do

1. If the smell is clearly food-related (like a scorched snack), let the unit cool, then clean the interior thoroughly.
2. If you smell burning plastic or something electrical/acrid rather than food, stop using the microwave immediately and unplug it.
3. Inspect the interior for a melted container, food debris, or scorch marks that would explain a food-related smell.
4. If you find and remove an obvious food-related cause, clean thoroughly, then test briefly with a cup of water and watch closely.
5. If you can't find an obvious cause, or the smell is clearly electrical/plastic-like rather than food, keep the unit unplugged.
6. Have a technician inspect the internal components before using it again if the cause isn't a clear, fixable food or container issue.

Tools and parts

• Soft cloth
• Mild cleaner

When to call a pro

If the smell isn't clearly explained by food or a melted container, call an appliance technician before using the microwave again.

Safety