Tristar
Reduced Heating Power – Weak Magnetron or Low Line Voltage
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 or weak magnetron, Low household line voltage, Failing high-voltage capacitor, Partial short in high-voltage diode
How to Fix / Troubleshooting
Safety: High-voltage diagnosis should be left to professionals.
User-level checks:
- 1. Compare heating: Heat 1 cup of water for 2 minutes. If it is only lukewarm, heating power is reduced.
- 2. Check line voltage: Avoid using long extension cords or sharing the circuit with heavy appliances. If possible, have an electrician verify that the outlet voltage is within normal range.
- 3. Professional service: A technician can test the magnetron output and high-voltage components. Often, replacing the magnetron and capacitor restores full power.
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Repair Difficulty
Professional Required
5/5
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