LG Refrigerator Error Code 35E

The 35E code on an LG refrigerator indicates that the Main PCB has detected an open circuit in the FF ice maker duct heater. This heater prevents frost from blocking the ice maker chute. The fault is typically caused by a connector that has slipped out, a broken wire in the harness, a contact defect at a terminal, or a failed heater element. A resistance measurement between connector CN79 and CN51 on the Main PCB is the first step to identifying the exact cause.

A 35E error means the ice duct heater is not functioning, which can allow frost to accumulate in the ice maker chute and eventually stop ice production. The refrigerator's cooling function is generally not immediately compromised, but continued operation without repair can worsen the ice maker blockage over time. It is best to diagnose and address the fault promptly rather than ignore it.

Repair costs vary depending on the root cause. If only a connector needs reseating, there may be no parts cost at all, though a service call fee typically ranges from around 75 to 150 dollars. If the heater element itself needs replacement, parts and labor combined can range from approximately 150 to 350 dollars or more depending on your location and the service provider. Diagnosing the fault first with a multimeter can help avoid unnecessary part replacement.

A DIYer with basic electrical knowledge and a multimeter can perform the initial diagnosis by checking resistance between CN79 (orange) and CN51 (brown) on the Main PCB. If the cause is simply a loose connector, reseating it may resolve the error without any parts. However, if a wire needs repair or a heater element needs replacement, comfort with appliance wiring and disassembly is required. If you are unsure, consulting a qualified technician is the safer option.

A power reset may temporarily clear the displayed 35E code, but the error will return if the underlying fault in the ice duct heater circuit has not been corrected. The Main PCB will continue to detect the open circuit on each diagnostic cycle and re-trigger the fault. A lasting repair requires finding and fixing the root cause, whether that is a loose connector, damaged wiring, or a failed heater element.