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Error code reference

GE Refrigerator Error Code 0513

Hot water thermistor reading out of range.

GE codesGE refrigerator codes

Hot water thermistor reading out of range.

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Get the full diagnostic procedure for 0513.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
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What 0513 means on a GE refrigerator

Error code 0513 indicates the GE refrigerator's control board has detected that the ice box thermistor is returning a reading outside its expected resistance range. The thermistor is a temperature-sensing component located in the ice box (ice maker compartment) that feeds real-time temperature data to the main control board. When the board sees a resistance value that is too high (open circuit) or too low (short circuit) for the thermistor's calibrated range, it logs code 0513 and can no longer trust the temperature reading from that zone.

For homeowners, this means the sensor responsible for monitoring the temperature inside the ice maker area has either failed or lost its connection to the control board. The refrigerator does not know how cold the ice box actually is, which can cause the ice maker to behave erratically, stop making ice, or run continuously. The freezer and fresh food sections may continue working normally since they use separate thermistors.

This code does not always mean the thermistor itself is bad. A broken wire, corroded connector, or loose harness plug between the thermistor and the control board can produce the same out-of-range reading. Checking the wiring harness before replacing the thermistor can save time and money.

Source: manufacturer service documentation.

Common causes of 0513

  1. 01

    Failed ice box thermistor

    Part replacement

    The thermistor itself has developed an open or short circuit internally, causing its resistance to fall outside the acceptable range. This is the most common hardware failure associated with code 0513 and requires replacing the thermistor.

  2. 02

    Damaged or disconnected wiring harness

    Wiring / connection

    The wire harness connecting the ice box thermistor to the main control board may have a broken wire, pinched section, or pulled connector that disrupts the resistance signal. Inspecting and reseating or repairing the harness should be done before ordering parts.

  3. 03

    Corroded or loose thermistor connector

    Wiring / connection

    Moisture in the ice box area can cause corrosion at the thermistor plug, increasing resistance at the connection point and pushing the reading out of range. Cleaning the connector terminals with electrical contact cleaner may resolve the code.

  4. 04

    Faulty main control board

    Part replacement

    If the thermistor and wiring both test within spec, the control board's input circuit for the ice box thermistor may have failed and is misreading a valid signal. This is a less common cause but should be considered after ruling out the sensor and harness.

See the test procedure for each cause

Frequently asked questions about 0513

What does error code 0513 mean on a GE refrigerator?
Code 0513 means the control board detected that the ice box thermistor is returning a resistance value outside its expected range. The ice box thermistor monitors temperature inside the ice maker compartment. The code triggers when the sensor reads as an open circuit, a short circuit, or an out-of-range resistance, signaling that the board can no longer get a valid temperature reading from that location.
How do I fix error code 0513 on a GE refrigerator?
Start by unplugging the refrigerator and locating the ice box thermistor connector. Inspect the wiring harness for breaks, pinching, or corrosion, and reseat the connector firmly. If the harness looks intact, use a multimeter to measure the thermistor's resistance and compare it to the spec in your model's service manual. A reading of open line or near-zero ohms confirms a bad thermistor that needs replacement. If the thermistor tests within spec, the main control board may need to be replaced.
Can I still use my GE refrigerator with code 0513 active?
The refrigerator's freezer and fresh food compartments typically continue operating because they rely on separate thermistors. However, the ice maker may stop producing ice, overproduce, or behave unpredictably since the control board cannot monitor ice box temperature accurately. Short-term use is generally safe for food storage, but leaving the fault unresolved for an extended period risks ice maker damage and should be addressed promptly.
How much does it cost to fix error code 0513 on a GE refrigerator?
If only the ice box thermistor needs replacement, the part typically costs between $15 and $40, and replacing it is a manageable DIY repair requiring basic tools and a multimeter. If the wiring harness needs repair, cost depends on whether a new harness is required or the existing wires can be spliced, usually under $30 in parts. A main control board replacement is the most expensive scenario, with parts ranging from $100 to $300 depending on the model, plus labor if you hire a technician.
Will clearing error code 0513 fix the problem on my GE refrigerator?
Clearing the code by unplugging the refrigerator will erase the fault from the display temporarily, but the code will return if the underlying cause has not been corrected. The control board re-evaluates the thermistor signal continuously and will log 0513 again as soon as it detects an out-of-range reading. Use the code clear only as a way to confirm a repair was successful after you have addressed the thermistor, wiring, or connector.

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