Prodigy Ice Maker Error Code 5

Error code 5 on a Prodigy ice maker indicates a sump water temperature sensor failure. The control board is receiving a signal from the sump thermistor that is outside the expected resistance range, which could mean the sensor has failed, the wiring is damaged, or there is a connector issue. The machine will stop producing ice until the fault is resolved.

When error code 5 is active, the machine has already halted its ice-making cycle as a protective measure, so continued use is not possible until the fault is cleared. Attempting to bypass the error without addressing the underlying sensor issue could lead to improper freeze cycles or uncontrolled operation. It is best to diagnose and resolve the fault before returning the unit to service.

A reset may temporarily clear the error code display, but if the underlying sensor fault still exists, the code will return once the machine attempts to run a cycle and reads the faulty sensor signal again. A lasting repair requires physically inspecting and correcting the sensor, wiring, or connector issue rather than relying on a reset alone.

A knowledgeable DIYer can inspect the sensor wiring and connectors for visible corrosion or damage and test the thermistor resistance with a multimeter. If the sensor or wiring is found to be faulty, replacing those components is a manageable repair. However, if the fault involves the control board or requires disassembling major components, a qualified technician is recommended.

Repair costs vary depending on the cause. A replacement sump thermistor is generally an inexpensive part, typically in the range of $15 to $50, while a control board replacement can cost considerably more, often between $150 and $400 or higher depending on the model. Labor charges from a technician will add to the total cost.