Bush Transformer or Relay Noise

Bush oven makes a buzzing or humming noise from the control area when heating.

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.

Possible Causes

Vibrating control transformer, Noisy heater relay, Loose mounting screws on PCB or transformer, Slight coil buzz under load

Safety first: Isolate power before removing the control panel.

Locate noise source: With the panel removed and power briefly restored (only for qualified persons), identify whether the noise comes from a relay or transformer.
Tighten fixings: Turn power off and tighten screws securing the transformer or PCB to reduce vibration.
Replace noisy component: If a relay is chattering or excessively loud, replace the control board or relay assembly.

Hard 4/5

Main Control Board

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