Cuisinart
Heater Relay or Transformer Noise
Buzzing or humming noise from the control area when heating.
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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 heater relay on control board, Loose mounting of control board, Noisy transformer or inductor in power supply
How to Fix / Troubleshooting
Safety first: Unplug before opening the control compartment.
- Step 1 – Isolate noise: Run the unit and listen to determine if the noise comes from the control panel area. Then unplug.
- Step 2 – Inspect control board: Remove the control panel cover and check that the main control board is firmly mounted. Tighten any loose screws or standoffs.
- Step 3 – Check relay: Light clicking is normal, but loud buzzing from a relay may indicate wear. If the noise is excessive or accompanied by heating issues, replace the main control board.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board
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