Sharp Microwave Error Code EE21

EE21 on a Sharp microwave means that magnetron 2 has reached the end of its service life. Magnetron 2 is one of the two magnetrons used in the microwave to generate the energy that heats food. The control board monitors magnetron usage and triggers this code when the component is worn out. Replacement of magnetron 2 is required to resolve the fault.

It is not recommended to continue using the microwave while the EE21 code is active. A degraded or failed magnetron may result in uneven or absent heating, which could give a false impression that food has been properly cooked. There is also a risk of additional stress on the high-voltage circuit components if the system continues to attempt operation with a worn magnetron.

Resetting the microwave by unplugging it or cycling the power will not clear the EE21 error permanently. Because the code is triggered by the control board detecting that magnetron 2 has reached end-of-life, the fault will return when the unit is powered back on. The only way to resolve EE21 is to replace magnetron 2, as the underlying hardware condition does not change with a reset.

Replacing a magnetron is a technically demanding repair due to the presence of high-voltage components including capacitors that can retain a dangerous charge even after the unit is unplugged. DIYers with experience in high-voltage appliance repair can perform this replacement, but most homeowners should hire a qualified appliance technician. The repair involves accessing the internal cavity and handling components rated for thousands of volts.

The cost to resolve an EE21 error depends on the model and labor rates in your area. Magnetron parts alone typically range from $50 to $200 or more depending on the specific unit. With professional labor, the total repair cost can range from $150 to $400 or higher. In some cases, especially for older or lower-cost units, replacing the entire microwave may be more economical than repairing it.