Sharp Microwave Error Code EE28

EE28 indicates a fault in the Magnetron 2 microwave sensor circuit. The control unit has detected an abnormal or missing signal from the sensor associated with the second magnetron. The microwave shuts down when this code appears to prevent unsafe operation. Resolving it requires inspecting the magnetron, wiring, control unit, and the sensor itself.

No. When EE28 is active, the microwave has halted operation because it detected a fault in the Magnetron 2 sensor circuit. Attempting to force the unit to operate with a magnetron or sensor fault could result in damage to the appliance or a safety hazard. Keep the unit unplugged until it has been inspected and repaired.

Repair costs vary depending on which component has failed. Wiring repairs or connector replacements are typically the least expensive, often in the range of $50 to $150 including labor. Replacing a microwave sensor or control board can range from $100 to $250 or more. A magnetron replacement is generally the most costly repair, often between $150 and $350 depending on parts and labor rates in your area.

Diagnosing EE28 involves working near high-voltage components, including the magnetron and capacitor, which can retain a lethal charge even after unplugging the unit. Unless you are trained to safely discharge microwave capacitors and work with high-voltage circuits, this repair should be handled by a qualified technician. Basic wiring inspections may be accessible, but component replacement requires significant expertise.

A simple power reset may temporarily clear the display, but EE28 will return if the underlying fault in the Magnetron 2 sensor circuit has not been corrected. The code is generated by an active hardware problem, not a software glitch. A lasting fix requires identifying and repairing the faulty component, whether that is the magnetron, wiring, sensor, or control unit.