Microwave runs (light on, turntable rotates, fan runs) but food does not heat at all.
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 of a microwave can be lethal. Do not attempt to access or test the magnetron, capacitor, diode, or transformer unless you are a trained technician.
User-level checks:
- 1. Confirm symptom: Place a cup of water in the microwave and run on HIGH for 1–2 minutes. If the water remains cold, there is a heating failure.
- 2. Check power level: Ensure the power level is set to 100% (HIGH) and not a low setting.
- 3. Avoid repeated tests: Do not repeatedly run the microwave empty or with no heating, as this can further damage components.
Next steps: A no-heat condition with all other functions working almost always indicates a failed high-voltage component (magnetron, diode, capacitor, or transformer). These require specialized tools and safety procedures. Contact a qualified Vida service technician for diagnosis and repair.
Repair Difficulty
Required Part
We may earn a commission from links on this page.