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Error code reference

GE Dryer Error Code 15

Water Temp Sensor Invalid

GE codesGE dryer codes

Water Temp Sensor Invalid - Thermistor disconnected/not present or failed thermistor.

First step from the service manual

Check thermistor resistance from connector J701 on the control board. Validate the resistance matches the table in mini-manual. Check wiring harness and connections. Replace thermistor.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 15 means on a GE dryer

Error code 15 on a GE dryer indicates a Water Temp Sensor Invalid fault, which means the control board has detected that the thermistor circuit is either open, disconnected, or reporting a value outside its valid operating range. The thermistor is a temperature-sensitive resistor that changes resistance as the dryer's temperature changes. The control board monitors this resistance continuously and uses the readings to regulate heating cycles. When the board cannot interpret a valid resistance value from the thermistor circuit, it triggers error code 15 and typically halts normal operation to prevent overheating or temperature-related damage.

Diagnosis begins at connector J701 on the control board. Technicians should disconnect the wiring harness at J701 and measure resistance across the thermistor leads using a multimeter. The correct resistance values vary by temperature and are listed in the dryer's mini-manual, which is typically located inside the cabinet. A reading of infinite resistance (open circuit) indicates a failed or disconnected thermistor, while a reading of zero or near-zero resistance suggests a short. Any reading that does not correspond to the temperature-resistance table in the mini-manual points to a faulty sensor.

Beyond the thermistor itself, the wiring harness between the sensor and the J701 connector should be inspected for broken wires, corroded terminals, or loose connections. Moisture, heat cycling, and mechanical wear are common contributors to harness degradation in dryer environments. If wiring integrity checks out and the thermistor resistance is out of specification, the thermistor should be replaced. In cases where the harness and thermistor both test correctly, the control board itself may be suspect.

Source: manufacturer service documentation.

Common causes of 15

  1. 01

    Failed or Burned-Out Thermistor

    Part replacement

    The thermistor itself has failed internally, producing a resistance reading that falls outside the valid range for any operating temperature. This is the most common cause and is confirmed by measuring resistance at connector J701 and comparing it against the mini-manual's temperature-resistance table.

  2. 02

    Disconnected Thermistor Connector

    Wiring / connection

    The thermistor may have become physically unplugged from the wiring harness due to vibration or improper reassembly after a prior repair. Inspect all connectors along the thermistor circuit, particularly at J701 on the control board, for loose or fully separated connections.

  3. 03

    Damaged or Corroded Wiring Harness

    Part replacement

    Wires in the harness leading from the thermistor to J701 can break, chafe against cabinet edges, or develop corrosion at terminal pins, creating an open or intermittent circuit. A visual inspection and continuity test of each wire in the harness will identify this issue.

  4. 04

    Corroded or Damaged Connector Terminals at J701

    Wiring / connection

    The terminals inside connector J701 on the control board can become corroded or bent, preventing proper electrical contact with the thermistor harness. Cleaning or carefully re-pinning the connector may resolve the fault without replacing the sensor.

  5. 05

    Faulty Control Board

    Part replacement

    If the thermistor resistance tests correctly at J701 and the wiring harness shows no faults, the control board's sensor input circuit may have failed. Control board replacement is the last step after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about 15

What does 15 mean on a GE dryer?
Error code 15 on a GE dryer means the control board has detected a Water Temp Sensor Invalid condition. This indicates the thermistor, which is the component that monitors dryer temperature, is either disconnected, not present, or has failed. The board cannot read a valid resistance value from the sensor circuit, so it flags the fault to prevent unsafe operation.
Can I fix GE dryer error code 15 myself?
Some causes of error code 15 are DIY-friendly, such as reseating a loose connector at J701 on the control board or inspecting the wiring harness for visible damage. If the thermistor itself has failed, replacing it is a moderate-difficulty repair that requires basic hand tools and a multimeter to confirm the diagnosis. Control board replacement is more complex and may be better left to a technician.
Is it safe to run my GE dryer when error code 15 is showing?
It is not recommended to operate the dryer while error code 15 is active. The thermistor is the component that allows the control board to regulate heating cycles accurately. Running the dryer without valid temperature feedback increases the risk of overheating, which can damage clothing or create a fire hazard.
Will resetting my GE dryer clear error code 15?
A power reset may temporarily clear the error code display, but if the thermistor or its wiring circuit remains faulty, the code will return as soon as the dryer runs a cycle. A reset alone does not address the underlying hardware problem. The thermistor circuit must be tested and the root cause corrected for the error to stay cleared.
How much does it cost to repair GE dryer error code 15?
Repair costs depend on which component is at fault. A replacement thermistor typically costs in the range of $15 to $50 for the part alone. If the control board needs to be replaced, parts can range from $100 to $300 or more depending on the model. Adding professional labor will increase the total cost, generally ranging from $100 to $200 for a service call and repair time.

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