LG Microwave Error Code E-25

E-25 on an LG microwave means the unit detected an overheat condition during a cooking cycle, with the internal temperature reaching 500 degrees Fahrenheit. When this threshold is hit, the microwave immediately stops all cooking modes and switches to cancel mode as a safety measure. The fault can be caused by a defective thermal sensor, a malfunctioning control circuit board, or an actual overheat event from blocked vents or a failed cooling fan.

No, you should not attempt to continue cooking while E-25 is active. The microwave is designed to shut down all cooking modes when this code appears precisely because operating at or above 500 degrees Fahrenheit poses a risk of component damage or fire. Allow the unit to fully cool down and diagnose the cause before attempting to use it again.

Repair costs vary depending on which component is at fault. A thermal sensor replacement is generally the less expensive repair, typically ranging from $50 to $150 including parts and labor. Replacing the control circuit board tends to cost more, often in the range of $100 to $300 depending on the specific model and service provider. If the microwave is older, comparing the repair estimate against replacement cost is worth considering before proceeding.

Unplugging the microwave and allowing it to cool down may temporarily clear the E-25 code, but if the underlying cause is not resolved, the error will return. If blocked vents or extended use caused the overheat, clearing the obstruction and allowing a cool-down period may resolve it. If the sensor or control board is faulty, a reset will not provide a lasting fix and the code will reappear during the next cooking cycle.

Start by checking that all ventilation openings are clear and that the microwave has proper clearance around it as required by the installation specifications. If ventilation is adequate, the next step is to inspect and test the thermal sensor, as a faulty sensor is one of the primary causes of this code. If the sensor is not the issue, the control circuit board should be evaluated and replaced if defective. Both components require replacement parts and, given the high-voltage components inside a microwave, professional repair is strongly recommended.