E12
MasterPro Internal Power Supply / Low Voltage Fault

E12 appears and the cooker shuts down unexpectedly during operation.

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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

Faulty low-voltage power supply on main PCB, Loose AC input connector, Damaged power cord, Overheating of internal power components

How to Fix / Troubleshooting

Safety first: Unplug the cooker. Do not work on live mains circuits unless you are qualified.

External checks:

  • Test the outlet with another appliance to confirm stable power.
  • Inspect the power cord for cuts, kinks, or burn marks. Replace if damaged.

Internal checks (qualified persons only):

  • Remove the bottom or rear cover to access the AC input and main PCB.
  • Ensure the AC connector is firmly seated and that there are no loose wires.
  • Inspect the power supply section (near where the cord enters) for burned components or bulging capacitors.

Resolution: If E12 persists and visual inspection shows damage, the main control board or power module must be replaced. Due to mains voltage risks, this repair is best left to a professional technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board
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