Microwave displays E09 and will not start; sometimes accompanied by a faint burning smell previously.

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

Burned power relay on main PCB, Shorted wiring to high-voltage transformer, Damaged main control board tracks, Previous power surge damage

Safety: Unplug immediately if you smell burning or see smoke. Do not attempt to use the microwave.

Visual check from outside: Look through vents for signs of charring or melted plastic. Do not insert tools.
Do not reset repeatedly: Repeated attempts to start may worsen internal damage.
Professional diagnosis: A technician should inspect the main PCB, relays, and wiring harness, and replace the control board or damaged wiring with Princess-approved parts.

Professional Required 5/5

Main Control Board

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