Microwave shows 'E-11' and may not heat or may shut down shortly after starting.

Safety: Unplug the microwave before removing any covers. Internal capacitors can hold a charge; do not touch high-voltage components.

• Power cycle: Unplug for 5–10 minutes and reconnect to see if the code clears.
• Clean interior: Wipe the oven cavity, especially near the vent openings and sensor area (often on the upper left side wall), with a mild detergent solution. Dry thoroughly.
• Inspect humidity sensor: On many Samsung models, the humidity sensor is mounted behind a small grill or cover inside the cavity or behind the control panel. If accessible without removing the outer cabinet, check for obvious damage or heavy grease buildup.
• Check wiring (advanced): If you can safely remove the control panel, locate the humidity sensor connector on the PCB and ensure it is firmly seated. Look for corrosion or broken wires.
• Replace sensor if needed: If cleaning and reseating connections do not clear E-11, the humidity sensor assembly should be replaced. If a new sensor does not resolve it, the main PCB may be defective and should be serviced by a technician.