Samsung Microwave Error Code E-28

E-28 indicates a temperature sensor short error. The control board has detected that the resistance across the temperature sensor terminals is abnormally low, suggesting the sensor or its wiring has developed a short circuit. The microwave will not operate normally until the fault is resolved.

No, you should not continue using the microwave while E-28 is active. The error means the temperature monitoring system is not functioning correctly, which removes an important safeguard against overheating. Disconnect the microwave from power until the sensor fault is diagnosed and corrected.

If only the temperature sensor needs replacement, parts typically range from $15 to $50 depending on the specific model. If a professional technician performs the repair, total costs including labor generally range from $80 to $200. Control board replacement, if required, will increase costs significantly.

A knowledgeable DIYer can test the temperature sensor using a multimeter to check resistance across the sensor terminals. If the sensor reads near-zero ohms, replacing it is a straightforward repair. However, microwave capacitors can retain a lethal charge even when unplugged, so always discharge the high-voltage capacitor before working inside the unit.

Unplugging the microwave and restoring power may temporarily clear the code, but if the underlying short condition in the sensor or wiring is still present, the E-28 error will return. A reset alone does not fix the hardware fault causing the code.