GE Refrigerator Error Code 0515

Code 0515 means the control board detected a hot water thermistor reading that is outside the normal operating range. The hot water thermistor monitors temperature in the refrigerator's hot water dispenser system. The fault is triggered when the sensor's resistance is too high, too low, or completely absent, which usually points to a failed thermistor, damaged wiring, or a loose connector.

Start by unplugging the refrigerator and locating the hot water thermistor, then inspect the connector and wiring harness for any loose, corroded, or damaged connections. Reseating the connector and clearing the code will confirm if a connection issue was the cause. If the code returns, use a multimeter to test the thermistor's resistance against the spec in your service manual. A reading that is open or shorted indicates the thermistor needs replacement.

Disconnect power to the refrigerator, then unplug the thermistor connector and measure the thermistor's resistance across its two terminals with a multimeter. At room temperature, most GE thermistors read in the range of 5,000 to 20,000 ohms, but check your specific model's service data for the correct value. A reading of zero ohms indicates a short, while an open line (no continuity) confirms the thermistor has failed and needs replacement.

Your refrigerator's primary cooling functions, including the freezer and fresh food compartments, are typically not affected by the 0515 code. However, the hot water dispenser should not be relied upon while this fault is active, since the control board cannot accurately monitor water temperature. Continued use of the hot water function without a functioning thermistor could lead to overheating the water system.

A replacement hot water thermistor typically costs between $20 and $60 for the part alone. If the repair requires a service technician, expect to add $100 to $200 in labor for a single-visit diagnosis and repair. If the fault traces to the main control board instead, that part ranges from $150 to $350 depending on the model, making that repair significantly more expensive.