Samsung Refrigerator Error Code Freezer Ice Pipe Heater Error (Cubed)

This error means the main control board has detected a fault in the heater circuit that keeps the cubed ice maker water supply pipe from freezing. The board measures resistance through the circuit at connector CN20 pins 19 and 23, and the reading has fallen outside the acceptable range of 72 ohms plus or minus 7 percent. The fault can be a shorted heater, an open heater element, a failed bimetal safety cutout, or a wiring problem.

This fault is not an immediate safety emergency for your home, but it does indicate a failed heating circuit. A shorted heater could in theory draw excess current, so addressing the error promptly is advisable. The refrigerator's control board detects the fault specifically to protect the system from operating with a defective circuit.

A power reset may temporarily clear the error code from the display, but the fault will return if the underlying problem in the heater circuit has not been repaired. Because the control board actively measures resistance in the circuit, a hard reset does not fix a shorted, open, or failed heater component. The resistance at CN20 pins 19 and 23 must fall within 67 to 77 ohms for the error to clear permanently.

A knowledgeable DIYer with a multimeter can perform the initial resistance test at CN20 pins 19 and 23 to determine whether the fault is a short (0 ohms) or an open circuit (infinite resistance). Identifying and replacing the specific failed component, such as the pipe heater or bimetal cutout, requires some comfort with disassembling the freezer compartment and ice maker area. If the main PCB itself is faulty, that repair is more involved and may be better suited to a professional technician.

Repair costs vary depending on which component has failed. A replacement pipe heater or bimetal cutout part typically costs in the range of $15 to $60 for parts alone. If professional labor is needed, total repair costs including diagnosis and labor could range from $100 to $300 or more depending on your location and service provider. A damaged wiring harness may cost less if only a connector repair is needed.