Microwave runs but does not heat food; turntable rotates and light is on, but food remains cold.
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 inside a microwave is extremely dangerous. Do not attempt to service the magnetron, transformer, capacitor, or diode unless you are trained and have proper tools to discharge capacitors safely.
User checks:
- Confirm you are using microwave-safe cookware and not metal or dishes with metallic trim.
- Test with a known load: place 1 cup of water in the center and run on HIGH for 1–2 minutes. If the water stays cold, heating has failed.
- Verify that the door closes firmly and that the unit does not stop mid-cycle.
If the unit runs but never heats, the fault is almost always in the high-voltage system. Because of the shock risk and radiation shielding requirements, contact a qualified microwave technician or replace the unit.