Microwave not heating
- Likely cause:
- When the light and turntable work but food stays cold, the high-voltage circuit is usually at fault. Common culprits are a failed magnetron, high-voltage diode, capacitor or a worn door switch.
- What we check:
- Your technician safely discharges the unit and tests the door switches, diode, capacitor and magnetron in turn.
- Typical fix:
- The typical repair is replacing the failed high-voltage component or door switch with a genuine OEM part.
Try first: Heat a cup of water for one minute on full power to confirm it truly is not heating, and make sure the power level was not accidentally set low.
















