Midea No Heat – High Voltage System Failure

Microwave runs (light on, turntable rotating, fan running) but food does not heat.

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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.

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Possible Causes

Failed magnetron, Open high-voltage diode, Open high-voltage capacitor, Faulty high-voltage transformer or inverter module

How to Fix / Troubleshooting

Critical safety warning: The high-voltage section of a microwave can be lethal. Do not attempt internal HV repairs unless you are trained. For most users, this is a technician-only repair.

User-level checks:

  • 1. Confirm symptom: Heat a cup of water for 1–2 minutes. If the water remains cold while the unit appears to run normally, heating has failed.
  • 2. Check cookware: Ensure you are using microwave-safe, non-metallic containers. Metal or foil can interfere with heating.
  • 3. Avoid further use: Continuing to run a microwave that does not heat can stress components. Unplug and arrange for service.

Technician-level summary: Test magnetron, HV diode, capacitor, and transformer/inverter; replace defective components with OEM Midea parts.

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Repair Difficulty

Professional Required 5/5

Required Part

Magnetron Assembly for Midea Microwave
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