Microwave runs (light and turntable on, fan humming) but food remains cold after the set time.
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: Heating faults involve the high-voltage system. Do not attempt internal repairs unless you are a trained technician.
User-level checks:
- Test with water: Place a microwave-safe cup of water inside and run for 1–2 minutes. If the water stays cold, heating is not occurring.
- Check power level and time: Ensure you have not accidentally set power to a very low level or used a defrost program with low output.
- Listen for abnormal sounds: A loud buzzing or arcing sound can indicate internal HV issues. Unplug immediately if heard.
Recommendation: For no-heat conditions on a Clatronic microwave, contact a qualified microwave technician to test the magnetron, HV diode, HV capacitor, and HV transformer. These parts operate at lethal voltages.