My microwave light and fan work, but it doesn't heat. Why?

The heating circuit is separate from the light and fan. A failed magnetron, diode or capacitor is likely, and the technician tests them safely.

Should I repair or replace a ten-year-old microwave?

It depends on the model and the part. Door switches and fuses are usually worth replacing, while a magnetron in a basic model often is not.

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Home/Hernando County/Spring Hill/Microwave Repair

Microwave service across Spring Hill

Many Spring Hill kitchens were updated with an over-the-range microwave that also vents the cooktop, so the microwave takes heat and grease from below every day. We cover 5 ZIP codes in Spring Hill.

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Common Microwave Faults

Door switches wear out from years of opening and closing, and a failed switch can stop the microwave or blow its internal fuse. A unit that runs and turns the tray but does not heat usually points to the magnetron, the high-voltage diode or the capacitor. On over-the-range models, grease clogs the filters and slows the vent fan, and the lamps and fan motor wear faster above a busy cooktop.

Storm surges can damage the control board or touch panel, leaving the display blank or the keypad dead. Steam from summer cooking can also work its way under a membrane keypad.

Safety and Service

Never open the microwave cabinet, because the capacitor can hold a dangerous charge. Check the breaker, clean the grease filters and test heating with a cup of water. The technician tests the switches, fuse, board and high-voltage parts, and compares the repair with a replacement honestly before you decide.

Before You Book: Microwave Checks

Safe first steps for the most urgent microwave problems, and when to leave it to a technician.

Sparking InsideSafety: End the cycle right away and unplug the microwave. Before running it again, remove any foil or twist ties and any dish with metallic trim.
Sparking Inside MicrowaveSafety: Unplug the microwave and wash the cavity with a mild detergent, especially the waveguide cover, the small panel on the side wall.
Runs with Door OpenSafety: Unplug the microwave right away and keep it out of use until it has been repaired. This is not something to attempt yourself.
Sparking from Turntable Tray AreaSafety: Unplug the microwave, lift out the tray and roller ring, and clean the cavity floor thoroughly while checking for spots of bare metal.

Symptoms, causes and repair-or-replace advice for every type of microwave are in our complete microwave repair guide.