Sharp Microwave Error Code EE18

EE18 indicates a fault with the Magnetron 1 microwave sensor. This sensor monitors the primary magnetron, which generates the microwave energy used to heat food. When the control unit detects a problem with the sensor's signal, it displays EE18 and stops operation to prevent damage or safety risks.

No, you should not continue using the microwave while EE18 is active. The error indicates a fault in the system that monitors the primary magnetron, and operating the unit could pose safety risks or cause further damage. Leave the microwave unplugged until the fault has been properly diagnosed and repaired.

Repair costs vary depending on which component has failed. Wiring repairs are generally the least expensive, while magnetron or control board replacements can range from moderately costly to approaching the value of the appliance itself. Labor costs for a qualified technician will also apply, and it is worth getting a diagnostic estimate before committing to a repair.

Some aspects of the diagnosis, such as inspecting wiring connections and connectors, can be done by a knowledgeable DIYer. However, the magnetron circuit operates at extremely high voltages, and capacitors in the circuit can hold a lethal charge even after the unit is unplugged. Any work near high-voltage components should only be performed by a qualified technician using proper discharge procedures.

Unplugging the microwave and plugging it back in may temporarily clear the display, but the EE18 code will return if the underlying fault is still present. A reset does not fix the sensor, wiring, magnetron, or control board issue causing the error. A proper component-level diagnosis is needed to resolve the problem.