GE Washer, Dryer Error Code 15

Error code 15 means the control board is receiving an invalid signal from the water temperature thermistor. The board detects this through connector J701 and determines the thermistor is either disconnected, not present, or has failed. The machine stops operation until the sensor issue is resolved.

A reset may temporarily clear the code from the display, but the error will return as soon as the control board checks the thermistor signal again during the next cycle. The underlying issue with the thermistor or its wiring must be physically corrected for the code to stay cleared.

If the fix is simply reseating a loose connector, there is no parts cost involved. A replacement thermistor typically costs in the range of $15 to $50 for parts. If the control board is the root cause, board replacement costs can range from $100 to $300 or more depending on the model, plus labor if a technician is hired.

A knowledgeable DIYer can start by checking whether the thermistor connector at J701 on the control board is fully seated, as a loose connection is a common and simple fix. Testing thermistor resistance with a multimeter and comparing it to the values in the mini-manual is also a manageable task. However, replacing the thermistor or control board may require comfort with appliance disassembly and electrical components.

It is not recommended to operate the machine while code 15 is active. Without a valid temperature reading, the control board cannot properly regulate heat, which could lead to overheating or inadequate cycle performance. The machine is designed to halt operation for this reason.