How long do microwaves last?
Most microwaves last 7 to 10 years. The NAHB study lists about 9 years for a microwave.
A microwave is one of the shorter-lived kitchen appliances and is usually cheaper to replace than repair. Upkeep is mostly about keeping the inside clean and the door working.
Typical lifespan: 7 to 10 years
The NAHB study lists about 9 years for a microwave.
Microwave maintenance checklist by season
Spring
Steam a bowl of water with a splash of vinegar or lemon to loosen splatter, then wipe the interior, the door edges and the seal. Food on the seal can stop the door closing fully.
Summer
If it is an over-the-range model, clean or replace the grease filter and check the vent fan and light. Never run it empty.
Fall
Check the turntable, roller ring and coupler for cracks. Look at the door hinges and latch and confirm the door closes firmly with no gap.
Winter
Check the power cord for damage and do not use an extension cord unless the manual allows it. Make sure the vents on the case are not blocked.
Signs your microwave needs replacing
- The food heats unevenly or not at all, though the light and fan run.
- Sparks or arcing, or a burning smell. Stop using it.
- The door does not latch, is bent, or has damaged hinges or seals.
- The display or buttons respond unreliably.
Typical microwave warranty
A limited one-year warranty on parts and labor is the usual baseline. Some brands cover the magnetron, the part that makes microwaves, for longer, often parts only. Terms vary by brand.
An appliance warranty tracker keeps your microwave's coverage dates and receipt in one place.
What to keep for a microwave
- The receipt
- Model and serial number, often on a label inside the door frame or on the back
- The manual, which has the over-the-range installation clearances
- The filter part number for over-the-range models
Common questions
How long do microwaves last?
Most microwaves last 7 to 10 years. The NAHB study lists about 9 years for a microwave.
Is it safe to use a microwave with a damaged door?
No. If the door is bent, will not latch or the seal is damaged, stop using it. The door and seal are what keep the energy inside.
Should I repair a broken microwave?
Usually not for a countertop model, since a replacement costs about as much as the repair. A built-in or over-the-range model may be worth repairing if the part is simple.
How do I maintain a microwave?
Follow your manual first. Each season: spring, steam a bowl of water with a splash of vinegar or lemon to loosen splatter, then wipe the interior, the door edges and the seal. Food on the seal can stop the door closing fully. Fall, check the turntable, roller ring and coupler for cracks. Look at the door hinges and latch and confirm the door closes firmly with no gap.