LG Microwave Error Code E-26

E-26 on an LG microwave means the control board did not detect a temperature rise above a programmed threshold within the first three minutes after a heater cooking cycle started. The microwave monitors an internal temperature sensor during this window, and if the sensor's analog-to-digital output does not reach the expected value, the unit stops and displays this code. The fault points to either the temperature sensor or the heater assembly as the most likely cause.

No, you should not continue using the microwave while E-26 is active. The error indicates the heating system is not functioning as expected, and the unit typically halts operation when this code appears. Using it in this condition could result in ineffective cooking or further component damage.

Unplugging the microwave for a minute and plugging it back in may temporarily clear the code, but the error will return if the underlying issue with the sensor or heater has not been resolved. E-26 is triggered by an active failure condition detected during operation, so a reset alone is not a fix. The root cause must be diagnosed and repaired to prevent the code from reappearing.

Some steps, such as checking wiring connections to the sensor and heater, are approachable for a knowledgeable DIYer. However, testing and replacing a heating element or temperature sensor involves working inside a microwave, which stores dangerously high voltage in its capacitor even when unplugged. If you are not experienced with appliance repair and high-voltage safety procedures, it is strongly recommended to have a qualified technician perform the repair.

Repair costs vary depending on which component has failed. A replacement temperature sensor typically runs in the range of $15 to $50 for the part, while a heater element can range from $30 to $100 or more depending on the model. Adding labor from a technician will increase the total cost, generally bringing the repair into the $100 to $250 range for most situations.