LG Refrigerator Error Code FS E

FS E is a freezer sensor error code indicating that the Main PCB has detected a short circuit, open circuit, or out-of-range resistance reading from the freezer temperature thermistor. The control board uses this sensor to monitor freezer temperatures and regulate the cooling cycle. When the signal falls outside acceptable parameters, the code is triggered and freezer performance may be affected. The first place to check is the wiring connector at CON7 on the Main PCB.

It is not advisable to continue using the freezer normally when the FS E code is active. Without an accurate temperature reading, the control board cannot properly regulate the freezer cooling cycle, which means food may not be kept at a safe temperature. You should check your freezer contents and address the error promptly to avoid food spoilage.

A reset, such as unplugging the refrigerator for a few minutes, may temporarily clear the FS E code, but it will return if the underlying problem has not been fixed. If the sensor, wiring, or connector is genuinely faulty, the code will reappear once the control board resumes monitoring the sensor circuit. A reset is useful for confirming whether the fault is intermittent, but it is not a substitute for proper diagnosis and repair.

Some causes of the FS E code are DIY-friendly, such as reseating a loose connector at CON7 or inspecting the wiring harness for visible damage. If the issue is a failed thermistor, a knowledgeable DIYer comfortable with multimeter testing and basic appliance disassembly can replace the sensor. However, if the Main PCB is at fault, repair becomes more complex and a qualified technician is recommended.

Repair costs vary depending on the root cause. If only a connector needs to be reseated, there may be no parts cost at all, though a service call can run anywhere from $75 to $150. A replacement freezer thermistor typically costs between $15 and $50 for the part itself. If the Main PCB needs to be replaced, parts and labor combined can range from $200 to $500 or more depending on the model.