Tower
Electrical Buzz from Transformer or Inductor
High-pitched whine or buzzing noise from the base during operation, even when not heating strongly.
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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
Vibrating inductor or transformer on main PCB, Loose PCB mounting screws, Slightly loose heating element connections causing arcing
How to Fix / Troubleshooting
Safety first: Unplug the cooker before opening. Do not touch live components.
- Check for normal operation: A faint hum can be normal. If the noise is loud or new, proceed with inspection.
- Inspect PCB mounting: Remove the housing and ensure the main PCB is firmly screwed down. Tighten any loose screws.
- Check large coils: Gently press on large inductors or transformers with an insulated tool while the unit is unplugged to see if they are loose. If they move, they may need to be resecured with electronic-grade adhesive by a technician.
- Inspect heater terminals: Look for discoloration or pitting on heating element connectors. Tighten or replace burnt connectors.
Because this involves mains circuitry, if the buzzing is accompanied by smell or heat, stop using the cooker and seek professional repair.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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