Rangemaster Voltage Drop / Control Power Instability

Digital display and controls reset or flicker when oven or hob is turned on.

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

Loose mains connection, undersized supply cable, failing internal power supply on control PCB, shared circuit overload

Safety first: Isolate the cooker before checking electrical connections.

Steps to check:

Terminal block: Inspect the main connection block for tight screws and no signs of overheating.
Dedicated circuit: Ensure the cooker is on a dedicated circuit of the correct rating, not sharing with other heavy loads.
Check for damage: Look for burnt connectors or discoloured wiring near the control PCB.
If wiring is sound: The low-voltage power supply on the control PCB may be failing and the PCB should be replaced.

Hard 4/5

Oven Control PCB

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