LG Refrigerator Error Code E 24

E 24 on an LG RSG5B* series refrigerator means the freezer defrost system detected an overheating condition during the defrost cycle. The control board monitors the defrost heater circuit and shuts down the defrost process when temperatures exceed safe limits. The code identifies a fault in the heater, defrost thermistor, wiring, or related thermal components. Diagnostic testing at the main PCB connector CN70 is the recommended starting point to isolate the specific failure.

Continued use is not recommended when E 24 is active. A shorted heater poses a risk of sustained overheating inside the freezer compartment, which can damage the evaporator coils and surrounding insulation. With defrost disabled, frost will also accumulate on the evaporator and gradually reduce cooling efficiency. Address the fault promptly to avoid secondary damage and potential food spoilage.

A power reset may temporarily clear the E 24 code from the display, but it will not resolve the underlying fault. The error will return once the refrigerator attempts the next defrost cycle and the control board detects the same overheating or circuit problem again. A permanent fix requires identifying and replacing the failed component in the defrost heater circuit.

A knowledgeable DIYer can begin by disconnecting CN70 on the main PCB and using a multimeter to measure resistance between the Orange and Brown wire terminals. A 0 Ohm reading confirms a shorted heater, while infinite resistance points to an open circuit from a cut wire or blown thermistor. Replacing a defrost heater or thermistor is within reach for someone comfortable working with appliance wiring, but if the PCB is suspect or wiring damage is extensive, professional service is advisable.

Repair costs depend on which component has failed. A defrost heater or thermistor replacement typically falls in the range of $80 to $200 including parts and labor. If the main PCB requires replacement, costs can rise to $250 to $450 or more depending on parts availability and service rates in your area. Getting a diagnostic assessment first helps avoid paying for parts that are not the root cause.