Tower Reduced Microwave Power Output

Microwave fan runs but there is little or no heating and cooking takes much longer than usual.

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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

Weak magnetron, low mains voltage, failing high-voltage capacitor, partially shorted high-voltage diode

How to Fix / Troubleshooting

Safety: Internal diagnosis involves high voltage; user steps are limited to external checks.

User-level steps:

  • 1. Power test: Compare heating performance using a standard test (e.g., 1 cup of water for 2 minutes). If significantly slower than before, output is reduced.
  • 2. Check mains supply: Avoid using long extension leads. Plug directly into a dedicated outlet.
  • 3. Compare with another outlet: If possible, test on a different circuit to rule out low voltage.

Advanced:

  • Technician should test the magnetron, HV capacitor, and HV diode and replace any weak components.
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Repair Difficulty

Professional Required 5/5

Required Part

Magnetron Assembly
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