LG Microwave Error Code E-2C

E-2C indicates a short circuit in the PCB-mounted temperature sensor that monitors the cooling fan motor. The control board has detected an abnormal resistance condition in this sensor circuit and has locked out microwave operation as a protective measure. The fault must be diagnosed and repaired before the unit will function normally again.

No, you should not continue using the microwave while E-2C is active. The error means the appliance cannot reliably monitor the cooling fan motor's temperature, which removes a key safeguard against overheating. Continued use could risk damage to internal components or create a safety hazard.

Repair costs vary depending on the root cause. If only the temperature sensor or a minor board repair is needed, parts and labor might range from $75 to $150. If the entire control board requires replacement, total costs including parts and labor could range from $150 to $300 or more, depending on the specific model and service rates in your area. For older units, it is worth comparing the repair cost against the price of a replacement microwave.

Some causes of E-2C, such as a dirty or moisture-contaminated control board, can be addressed by a knowledgeable DIYer with electronics experience. However, microwaves contain a high-voltage capacitor that can retain a lethal charge even when unplugged, so the capacitor must be safely discharged before any internal inspection begins. If the repair involves replacing PCB components or the control board itself, a qualified technician is strongly recommended.

A reset, such as unplugging the microwave for several minutes and restoring power, will not permanently clear E-2C because the underlying short circuit in the sensor will still be present when the unit powers back on. The error will return immediately or as soon as the control board runs its diagnostic checks. The physical fault in the sensor or PCB must be corrected to resolve the code.