Sharp Microwave Error Code EE3

EE3 indicates a failure of both high voltage circuits 1 and 2 caused by both magnetron temperature fuses being blown. These fuses are thermal safety devices that open permanently when a magnetron reaches an unsafe operating temperature. The code means both magnetrons overheated at some point and the protective fuses cut power to both high voltage circuits. The microwave will not heat until the fuses are replaced and the underlying cause of overheating is corrected.

No, the microwave should not be used while the EE3 code is active. Both high voltage circuits have been shut down by blown safety fuses, meaning the unit will not heat, but attempting to force operation or bypassing the safety fuses creates a serious fire and electrical hazard. The root cause of the overheating must be identified and corrected before the unit is returned to service.

Repair costs vary depending on which components have failed. Replacing both thermal fuses is relatively low in parts cost, but if the fan motor or one or both magnetrons also require replacement, the total cost rises significantly. Labor charges from an appliance technician plus parts typically range from $100 to $350 or more depending on the extent of the damage. If both magnetrons require replacement, it may be worth comparing the repair cost against the cost of a new unit.

Clearing this code requires working inside the microwave near high voltage components, including the magnetrons and their associated capacitors, which can store lethal voltage even when the unit is unplugged. Technicians experienced with high voltage appliance repair can test the fan motor, check ventilation, and replace the blown thermal fuses. If you are not comfortable with high voltage safety procedures, this repair is best left to a qualified appliance technician.

Unplugging the microwave and plugging it back in will not clear the EE3 code because the thermal fuses are physical components that have permanently opened and cannot be reset by cycling power. The code will return as long as either fuse remains blown. Both fuses must be physically replaced, and the cooling system must be inspected and repaired before the error will resolve.