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The average lifespan of a microwave is typically between 7 and 10 years, though this can vary. Some models may last as few as 5 years, while high-end or boutique brands can function for up to 15 years.

Several factors influence a microwave's longevity, including its make, model, and quality, as well as how frequently it is used and how well it is maintained.

To extend the life of your microwave, follow these maintenance and usage tips:

• Clean regularly: Immediately wipe up spills and food debris. For stuck-on food, you can heat a bowl of water with a bit of lemon juice for a minute to create steam, which makes cleaning easier.

• Maintain filters: For over-the-range microwaves, regularly clean the grease filter underneath to ensure it runs efficiently. Clean or replace other filters as needed.

• Handle with care: Avoid slamming the door, as this can damage the door switches over time.

• Use it safely: Never run the microwave when it's empty, and do not put metal objects or dishes with metallic trim inside, as this can damage the appliance and create a fire hazard.

• Inspect the power cord: Periodically check the cord for any signs of damage.

Although some oven doors have screws in them that hold the handle or the glass in place, you should not remove these screws. Your oven’s hinges should pull loose without the need to remove the screws. If you are repairing your oven door, though, you may need to remove some screws.

Professional setup takes about 30 minutes to 1 hour, ensuring functionality checks before completion. Technical issues may extend this timeframe.

In most cases, it is more cost-effective to repair a microwave rather than replace it, especially if the appliance is relatively new and not nearing the end of its typical seven-year lifespan. The average cost to repair a microwave is around $175, whereas a replacement can average $500, including the new unit and installation. The cost of a new microwave varies significantly by type, from $50 to $500 for a countertop model to as much as $3,500 for a combination oven. If your microwave is less than five years old, a repair is likely the better financial choice. However, if it is approaching the end of its life—usually around seven to eight years old—replacing it might be more sensible in the long run.