Microwave runs (light on, fan and turntable operate) but food does not heat.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Critical safety warning: The high-voltage section can be lethal. User troubleshooting should be limited to external checks.
User-level steps:
- Verify that you are using microwave-safe cookware and not running the oven empty.
- Test with a cup of water for 1–2 minutes. If the water remains cold, the unit truly is not heating.
- Listen for the normal low hum of the magnetron. If absent or unusually loud, a high-voltage component may have failed.
Do not attempt to access or test the high-voltage components unless you are trained. Contact a qualified technician to diagnose and replace the magnetron, transformer, capacitor, or diode as needed.