Microwave ovens are used daily in restaurants, cafeterias, breakrooms, kitchens, snack bars, and homes for heating food. They’re fast, convenient, and a staple in everyday life. But what happens when your microwave catches fire?
Microwave fires often result from metal objects, overheated food, dirty interiors, or electrical malfunctions. These small appliances can quickly become a fire hazard if not used or maintained properly.
What You Need to Know Before Using It Again is critical especially if your microwave caught fire recently. Checking damage is necessary, in most cases, it’s best not to use the microwave again until it has been inspected by a professional. If there’s visible damage, smells of smoke, or melted components, replacement is usually the safest option.
Microwave-related fires may seem rare, but they still pose a risk. According to the National Fire Protection Association (NFPA), microwaves are responsible for around 4% of cooking-related home fires in the U.S. annually. While that’s much lower than stove top fires, the damage can still be serious if not addressed properly.
Why did Your Microwave Catch Fire in the First Place?
Microwave fires can be caused by several common factors, metal objects sparking inside, food items overheating or burning, or grease and grime buildup igniting under high heat. Faulty components like the magnetron or waveguide cover can also spark a fire. In older models, insulation and wiring may degrade over time, increasing fire risk.
In some cases, improper installations by unqualified providers similar to how some unlicensed fire alarm companies operate can result in poorly functioning or unsafe appliances.
Can I Still Use My Microwave After a Fire?
Yes but Not until it’s been fully inspected. Even a small fire can damage internal components like the magnetron, circuit boards, or insulation. Here’s what you should know before using it again:
- Do Not Use It Until You’ve Inspected It
Even minor-looking fires can hide deep internal damage. Using it without proper inspection could trigger another fire or expose your home to electrical hazards. - Look for Visible Damage
Check both the inside and outside of the microwave for scorch marks, melted parts, or warped plastic. Pay close attention to the waveguide cover, door seals, and control panel. Also, sniff for a persistent burnt smell, it can signal soot or electrical burning hidden inside. - Keep It Unplugged
Always unplug your microwave immediately after a fire. This prevents accidental use and avoids the risk of electrical shock or short-circuiting. It’s a basic step, similar to what’s required during any fire extinguisher service inspection. - Have It Checked by a Professional
Our licensed appliance technician can inspect the internal components, test the magnetron, and check for damage to insulation, vents, and wires. If your microwave is old or repair costs are too high, replacement is often the safer, more cost-effective route.
Pro Tip: Ask the technician for a written report, useful for insurance claims if there’s significant damage from the microwaves fire.
- Clean Thoroughly If Safe to Keep
If our technician clears it for continued use, a deep clean is essential. Use vinegar steam to loosen debris, scrub using gloves and non-toxic cleaners, and deodorize with natural methods like lemon or baking soda. - Watch for Warning Signs in the Future
If your microwave sparks, makes odd noises, emits a burnt smell, or heats unevenly, stop using it immediately. These signs can indicate lingering or returning internal issues, like when your fire alarm beeps randomly signaling a hidden problem.
Pro Tip: Never reuse a microwave that’s been in a fire without getting it professionally checked. Hidden damage can turn a minor incident into a serious fire hazard.
How to Safely Put Out a Microwave Fire (Step-by-Step)
If your microwave catches fire, keep calm. First, do not open the microwave door, oxygen can make the flames worse. Immediately turn off the microwave and unplug it if it’s safe to do so.
Most small microwave fires will smother themselves once the door remains closed. If the flames persist or spread, use a Class C fire extinguisher (rated for electrical fires). Never use water, it can cause electrical shock. Once the fire is out, do not attempt to use the appliance again until it’s inspected.
How to Clean Your Microwave After a Fire: 6 Essential Steps
Once cleared for use by our technician, start the cleaning process with protective gloves. First, ventilate the room and wipe away loose soot with a dry cloth. Steam-clean using a bowl of water and vinegar to loosen any remaining debris. Scrub all surfaces with non-toxic cleaners and rinse thoroughly.
Remove and clean the turntable separately. Finish by deodorizing with baking soda or citrus slices left overnight.
Pro Tip: Avoid abrasive tools or cleaners, these can damage the microwave’s interior finish and worsen heat retention issues inside the microwave to absorb burnt odors.
How to Eliminate the Burnt Smell From Your Microwave
To get rid of lingering smoke or burnt food smells, try steaming a mix of water and lemon juice or vinegar for 5–10 minutes. This breaks down odors clinging to internal surfaces.
For persistent smells, baking soda in a small open container can absorb lingering scents overnight. Avoid harsh chemical sprays, they can damage internal parts and leave behind toxic fumes.
Microwave Fire Stats Every Homeowner Should Know
According to the National Fire Protection Association (NFPA), microwave ovens cause over 7,000 house fires per year in the U.S. alone.
Most of these fires are caused by unattended cooking, metal objects sparking inside, or overheating food.
- Microwaves account for 4% of all cooking-related home fires annually.
- Nearly 1 in 5 microwave fires result in an injury.
- Children under 5 are at a higher risk of microwave-related scald injuries, especially when retrieving hot liquids or food.
- More than 50% of microwave fires happen during food preparation, not due to mechanical failure.
- Property damage from microwave fires can cost homeowners thousands in repairs, even if the fire is small and contained.
Microwave Safety Tips to Prevent Fires
To prevent microwave fires, never put metal objects inside and always use microwave-safe containers. Keep the interior clean by regularly wiping down grease and food splatters. Avoid leaving the microwave unattended while in use, and replace any damaged parts like the waveguide cover or door seal. If you notice a burning smell, stop using the appliance immediately.
These tips help prevent both electrical and food-based fires and ensure safe daily use.
Pro Tip: Create a quick kitchen safety checklist and stick it on your fridge to avoid forgetfulness and reduce microwaves fire risks.
Still Smelling Smoke or Seeing Damage? When to Repair vs. Replace
If your microwave still smells burnt or looks damaged after a thorough cleaning, it’s likely time for a replacement. Internal components may still be compromised, even if they appear okay. For microwaves older than 7–10 years, repair might not be worth the cost.
Pro Tip: Modern microwaves come with improved safety features, auto shut-off, better insulation, and child locks. Investing in a new one may offer peace of mind and fewer fire risks.
Final Thoughts:
A microwave fire can be a scary experience but knowing what to do next is just as important as reacting in the moment. Always prioritize safety by unplugging the unit, keeping the door shut, and seeking professional inspection before reuse. Whether it’s a minor incident or a more serious one, don’t take chances with hidden damage.
Investing in regular maintenance, safe usage practices, and timely replacements when needed can prevent future fires and give you peace of mind. When in doubt, replace it.
Your Safety always comes first
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