How do you tell if you need a new microwave?

Author: Ms. Aubree Auer V  |  Last update: Tuesday, July 1, 2025

When to replace the microwave? Common signs that your microwave needs changing
  1. Making funny noises.
  2. Smells like electrical burning.
  3. Isn't cooking food in the usual time or cooking unevenly.
  4. Needs help to work properly – such as a spoon to hold the door closed.
  5. Keypad has stopped working.

How do you know when a microwave needs replacing?

Old age. If your microwave is approaching the 10-year mark, consider replacing it with a new, energy-efficient unit. Odd smells. Odd odors, such as a burning smell, smoke, or sparks, are a sign something is amiss, and you should immediately turn off and unplug the microwave and call for a repair.

How do you know when a microwave goes bad?

For example, if the microwave cooks too slowly or quickly, it might need replacement. The best way to check it is by placing a cup of water and heat for 2 minutes. It should come out piping hot. If not, replace the appliance.

Is a 20 year old microwave still safe to use?

Microwave ovens typically have a lifespan of about 10 to 15 years, depending on usage and maintenance. After this period, they may still work, but their efficiency and safety can diminish. It's important to regularly check for signs of wear, such as unusual noises, arcing, or door seal issues.

What usually goes out on a microwave?

Understanding the most common parts that can break in a microwave, such as the magnetron, door switches, turntable, control panel, and high voltage components, can help users identify issues early and seek professional repairs or replacements.

10 Things To Consider Before Buying A Microwave

How do you know if your microwave is about to go out?

If you need to push, re-push and then push some more on the buttons to get them to work, chances are your keypad is going out. A dying microwave often takes more time to heat foods. If the latch on the door is broken -- and you need to use duct tape to keep it closed -- it's time to get a new microwave.

What is the average life of a microwave?

To avoid replacing yours more than about once every 10 years—which is how long most manufacturers tell us they should last—you'll want to take care of it. Your microwave may not get as grimy as your oven, but even so, one of the best ways to keep it humming along is to keep it clean.

When should you throw out your microwave?

On average, microwaves last 7-8 years.

What is the difference between old and new microwaves?

Newer microwaves are designed with more energy-efficient technology, which can result in lower electricity bills. This can add up over time and could potentially offset the cost of purchasing a new microwave.

How do I know if my old microwave is safe?

6 Signs It's Time to Replace Your Microwave
  1. Smoke, sparks, and burning smells. These are signs of a serious and urgent problem. ...
  2. Food isn't cooking properly. ...
  3. It makes horrible sounds as it cooks. ...
  4. The door doesn't seal properly. ...
  5. The keypad doesn't function. ...
  6. It's over 10 years old.

How do you test to see if a microwave is bad?

Heat the water for exactly 2 minutes and 30 seconds on the High power level. The High power level is the default heat setting on the Microwave. A temperature rise in the range of 28 to 40 degrees Fahrenheit (15 to 22 degrees Celsius) indicates that the Microwave oven is heating/cooking properly.

Is it worth fixing a microwave?

If the cost of repairing a microwave comes close to or exceeds the price of a new one, it might make more financial sense to replace it. However, if the costs of repairing are relatively low and the microwave isn't too old, it could be worth repairing the microwave.

What are the symptoms of a bad magnetron in a microwave?

One of the most common issues with a malfunctioning Magnetron is the lack of heating. If your microwave is running but not producing heat, it could be due to a faulty Magnetron, burned-out filament, or a malfunctioning high-voltage diode.

What causes a microwave to go bad?

It may be a damaged power cord, a bad fuse, or a malfunctioning circuit board – all of which are issues with the microwave itself. This microwave failure may also be from a natural cause. Have there been any power surges or storms near you? That can cook the wiring in your appliance.

Do microwaves lose power as they age?

As a magnetron ages the emitted waveform becomes less pure and “splashy". This makes it less efficient. In Radar terms a splashy magnetron has to be replaced immediately For cooking purposes the chicken will still get cooked but maybe not as quickly.

How do you tell if something is not microwave safe?

Put one cup of water in a glass measuring cup, and set it in the microwave oven next to (but not touching) the container to test. Microwave on high 1 minute. If the cooking container feels warm or hot, it is not microwave safe because it contains metal in the material or glaze.

How do I know when I need a new microwave?

When to replace the microwave? Common signs that your microwave needs changing
  1. Making funny noises.
  2. Smells like electrical burning.
  3. Isn't cooking food in the usual time or cooking unevenly.
  4. Needs help to work properly – such as a spoon to hold the door closed.
  5. Keypad has stopped working.

Is it okay to use a 20 year old microwave?

Microwaves older than 10 years or with faulty doors should be replaced immediately in order to reduce radiation exposure while you cook.

Why we don't throw out old microwaves?

Don't Toss Out Your Broken Microwave

Because of their electrical components, microwave ovens are considered e-waste in some places, and improper disposal will get you some serious fines and/or into a bit of legal trouble.

Why are people ditching microwaves?

"Microwaves alter the taste of food, take up a lot of room and make nearly everything mushy," she says. Nicole Robina, a publicist, agrees with Shortt that conventional ovens are the way to go. "Everything tastes better when you heat it up in the oven," she says. "It's worth the extra time."

Where to throw away a microwave?

Take Your Microwave to an Electronic Waste Recycling Center

If your local recycling center doesn't accept appliances, you can check with an environmental conservation group such as GreenCitizen, which accepts mail-ins. Send your microwave to them and they will recycle it for you for a small fee.

Can a microwave wear out?

On average, a microwave can last between 9 to 10 years before it may need replacement. However, this can vary depending on the brand, model, usage, and maintenance. While older microwaves can still be safe to use, it's essential to inspect them regularly for any signs of wear and tear.

How do I know if my microwave is going bad?

Microwave Runs Without Heat

If your microwave is running, spinning, and shining a light but no heat is produced, your problem might be the magnetron itself. The magnetron heats food from the inside out. If your microwave won't run with heat, it might be worth replacing the entire microwave.

How to test your microwave?

--Fill a glass measuring cup with exactly one cup of tap water. --Microwave, uncovered, on HIGH (100% power) until water begins to boil. Start by setting the timer at three minutes. --If the water boils in less than three minutes, the oven's wattage is 600 to 700 watts.

Do more expensive microwaves last longer?

Yours will probably last about 10 years. But when it's time to replace it, you needn't spend much money on a new one. Most inexpensive microwaves are made by only a couple of manufacturers, so it doesn't make much difference which one you buy.

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