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Magnetrons burn out when their magnets crack, terminals overheat, or internal connections loosen. Excess heat does most of the damage, so make sure the vents stay clear and the unit has breathing room on all sides. Good airflow and routine cleaning go a long way toward keeping the magnetron alive.

Signs that you need a microwave repair include the unit's inability to heat, extended cooking times, sparks, odd noises, burning odors, or running with the door open. A malfunctioning touchpad, an unlatched door, or a turntable that won’t spin are clear indicators that a repair is needed. 

It makes sense to fix a microwave if the repair costs less than a new unit and the appliance isn’t past its prime. Built-in or high-end models are good candidates for repair, while a budget countertop unit over 10 years old is less expensive to replace. Before deciding, compare repair quotes with the price of a new model. 

Wiping down the inside of the microwave each week keeps grease from clogging vents and trapping heat around key parts. A quick steam clean with lemon, vinegar, or baking soda loosens stuck-on food without harsh chemicals. Sticking to a simple cleaning schedule reduces overheating, extends the microwave’s lifespan, and helps it reach its full potential. Seeking advice from an appliance repair technician on maintenance tips can help you prolong the useful life of your microwave.

Microwaves last seven to eight years with consistent care. With consistent cleaning and proper maintenance, many units continue to operate efficiently for 10 years. In some high-end models, rigorous upkeep and advanced component quality can extend the unit’s performance for up to 15 years. Routine service checks and a maintenance schedule can safeguard your microwave’s longevity.

When you suspect your microwave fuse is blown, the appliance may not start, and the display might be unresponsive. To check a glass fuse, begin by disassembling the panel and inspecting the fuse area for melting or discoloration. To check a ceramic fuse, use a multimeter to test for continuity. A failed fuse stops the microwave from operating and must be replaced to avoid further damage.