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Whether or not it’s safe to use a buzzing microwave depends on what’s causing the noise. If a loose fastener or a dirty cooling fan is the underlying issue, it’s safe to use your microwave, although you may do damage to the fan motor if you don’t clean the blades first. If the issue is stemming from something else, you could do further damage to your appliance and potentially even start a house fire if you don’t repair it before continued use. If the microwave is buzzing when not in use, shut the power and call an emergency electrician, as this could lead to a fire.

The magnetron, which generates the microwave energy to heat food, is one of the most common components to fail. When the magnetron fails, the microwave can no longer heat food. Other frequently failing parts include the door switch, which prevents the microwave from operating if the door is not securely closed, the light bulb, and control panel buttons that may stop responding. Repairing a broken magnetron usually costs between $100 and $200, or $175 on average. About half of that cost is for labor and the other half is for the new part, though costs may be higher for high-end models.

Most standard refrigerators last between 10 and 18 years, though the average life expectancy is about 14 years. Compact fridges have shorter life spans, usually between 4 and 12 years. To maximize your fridge’s life expectancy, be sure to clean it regularly and schedule regular maintenance with a local refrigerator repair company.

How long a refrigerator lasts depends on the brand, model, and the level of maintenance you carry out, but the average lifespan is around 15 years. In general, a fridge can last anywhere from 8 to 27 years, though most fridges will be good to use for 10 to 15 years. You can extend the usable life of your refrigerator by having it serviced as soon as you notice any issues.