A microwave oven typically lasts 7 to 10 years with normal household use.
Average lifespan of a microwave
Most countertop microwaves last around 7–10 years. Built‑in units may last slightly longer with proper ventilation.
What affects how long a microwave lasts
Usage frequency, cleanliness, and power surges affect longevity.
Signs a microwave needs replacing
Uneven heating, strange noises, sparks, and door seal damage are warning signs.
How to make a microwave last longer
Cleaning spills promptly and avoiding metal objects helps prevent damage.
When replacement is necessary
Replacement becomes necessary when heating fails or safety issues arise.