Zanussi Reduced Output – Weak Magnetron or Power Control Fault

Microwave interior light, fan, and turntable run, but food heats very slowly compared to normal.

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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

Aging magnetron with reduced emission, Faulty power control circuitry, Intermittent high-voltage capacitor, Incorrect mains voltage supply

How to Fix / Troubleshooting

Safety first: Unplug before any inspection.

  • Compare heating: Heat 250 ml of water for 1 minute on full power. If temperature rise is minimal, output is low.
  • Check supply voltage: Avoid using long extension leads or overloaded circuits that may drop voltage.
  • Reset unit: Unplug for 10 minutes, then retest.
  • Service required: If slow heating persists, the magnetron or control circuitry likely needs replacement.
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Repair Difficulty

Hard 4/5

Required Part

Magnetron
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