How Long Do Microwaves Typically Last?

If you’re in the market for a new microwave, it can be helpful to know how long it might last so you can decide how much you’re willing to invest in an appliance with that expected lifespan. And if you already own one that’s been with you for a few years, you may be wondering how much life it has left before it’s time to purchase a new one.

This article breaks down the typical lifespan of microwaves, when to replace one, when to repair it, and tips for making your microwave last longer.

How long do microwaves last?

Microwaves typically have a lifespan of around 7 to 10 years. However, many microwave owners report having theirs for 15 years, 20 years, or even longer, with it still working fine. That said, if you live in a busy household where multiple people use the microwave daily, it’s not unusual for it to only last 5 or 6 years.

In a nutshell, a microwave can last anywhere from 5 to over 20 years, but the most common range is between 7 and 10 years.

When should you replace your microwave?

You should consider replacing your microwave if it’s over 7 years old and experiencing any of the following issues:

• It heats more slowly or unevenly
• It emits loud or unusual noises while running
• The door doesn’t close properly or the seal is damaged
• It emits burning smells
• The keypad doesn’t work properly
• It requires frequent repairs
• It has rust or corrosion in the interior

Additionally, you may want to consider replacing your microwave at an earlier age if:

• A major component, such as the magnetron, control board, or high-voltage transformer, breaks
• The cost of repair is more than 50% of the cost of a new microwave

Some people may also choose to replace their microwave at any age and upgrade to a new one for the following reasons:

• Greater energy efficiency
• More advanced cooking functions and features
• Larger capacity or a more compact design
• A design or aesthetic that aligns with the kitchen’s style

When should you repair your microwave?

You should consider repairing your microwave if it’s under 7 years old and if the following apply:

• It has a minor issue that’s identifiable and fixable
• The cost of repair is less than 50% of the cost of a new microwave
• The microwave is a higher-end model
• The microwave is new and still covered under its warranty

How to make your microwave last longer

Some people are lucky and have a microwave that lasts for years, while others find theirs breaks quickly. But it’s not all about luck—there are steps you can take to help your microwave last as long as possible.

Choose a reputable brand

Brands with a proven reputation for building durable microwaves with high-quality components are generally a better choice if you want confidence that your microwave will last its expected lifespan—or even longer.

Clean it regularly

To maximize the lifespan of your microwave, clean it regularly—ideally after each use, especially if food spills or splatters.

A dirty microwave operates less efficiently, forcing it to work harder and putting extra stress on its components. Additionally, the buildup of grime from food splatters can corrode the interior, potentially leading to rust and other problems.

A quick wipe of the interior with a damp, soapy cloth is usually sufficient if done after each use.

However, if there’s caked-on grime, you can perform a more thorough cleaning by placing a microwave-safe bowl with 1 cup of water and 2 tablespoons of white vinegar inside the microwave, heating it on high for 5 minutes, and then letting it sit for a few additional minutes. This will loosen the grime, making it easy to wipe away.

Don’t run it empty

Running a microwave while it’s empty can cause serious damage to the appliance, shortening its lifespan. This is because there’s nothing to absorb the microwave energy, so it gets absorbed by the microwave itself, leading to issues such as damage to the magnetron or the cavity walls.

Always place food or a cup of water inside the microwave if testing it.

Avoid placing metal objects inside your microwave

Metal objects should never go in the microwave as they can create sparks and electrical arcs. This can severely damage the microwave’s interior and other parts, shortening its lifespan and even increasing the risk of a fire occurring.

Only use microwave-safe containers

Containers labeled microwave-safe are specifically designed to withstand the extreme conditions inside a microwave. Using other unlabeled materials risks them melting, sparking, and potentially causing damage to your appliance, which can decrease its lifespan.

Don’t slam the door

Damage to the door or its latches can be expensive to fix, and your microwave will likely stop running if the door is compromised as the appliance has a built-in safety feature to prevent microwave radiation from escaping if the door is open.

Therefore, it’s important not to slam the door shut. Instead, close it gently to avoid accidentally damaging it.

Cover the food

Covering food in the microwave helps extend the appliance’s lifespan by preventing food splatters and spills from coating the interior walls, ceiling, and other components, potentially causing damage. Using a microwave-safe cover not only keeps the interior cleaner but also helps cook food more evenly by retaining moisture.

Use the correct settings

Try to set appropriate cooking times when heating food or beverages. Running your microwave longer than required causes unnecessary wear and tear on its components and can lead to food overheating, which can result in splatters.

Summary

While all microwaves eventually wear out and lose effectiveness over time, requiring replacement, their lifespan can vary significantly. The most common life expectancy for microwaves is 7 to 10 years; however, some microwaves last less time if used very frequently, while others can last over 15 or even 20 years.