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Error code reference

GE Refrigerator Error Code F513

Door Board Hot Water 2 Thermistor invalid

GE codesGE refrigerator codes

Door Board Hot Water 2 Thermistor invalid - thermistor temperatures do not match.

First step from the service manual

Check hot water thermistor 2.

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

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What F513 means on a GE refrigerator

The F513 error code on a GE refrigerator indicates that the Door Board Hot Water Thermistor 2 is reading an invalid signal, specifically that the temperature readings from this thermistor do not match expected values or do not correlate with a companion sensor. This thermistor is part of the hot water dispensing system integrated into the refrigerator door board, and its job is to monitor water temperature in the hot water circuit. When the control board detects a discrepancy or out-of-range signal from this sensor, it logs F513 to flag the fault.

The most common root cause is a failed or failing thermistor that is producing a resistance value outside the acceptable range for the given temperature. Thermistors change resistance predictably with temperature, and if the sensor is damaged, has a corroded connector, or has developed an open or short circuit, the door board will register the mismatch and trigger this code. Wiring issues between the thermistor and the door board, such as a loose pin, broken wire, or damaged harness running through the door hinge area, can also produce this fault.

Diagnosis should begin with a direct inspection of hot water thermistor 2, including checking the connector for corrosion or loose pins and testing the thermistor resistance with a multimeter to confirm it falls within the expected range for ambient temperature. If the wiring and connector check out, the thermistor itself should be replaced. If replacing the thermistor does not resolve the fault, the door board may be the source of the problem.

Source: manufacturer service documentation.

Common causes of F513

  1. 01

    Failed Hot Water Thermistor 2

    Part replacement

    The thermistor itself has failed and is producing a resistance value that does not correspond to the actual temperature, causing the door board to flag a mismatch. Testing with a multimeter will reveal an open circuit, short, or out-of-range resistance reading.

  2. 02

    Loose or Corroded Thermistor Connector

    Wiring / connection

    The connector joining thermistor 2 to the door board wiring harness may have a loose pin or corrosion that interrupts the signal. Inspect the connector carefully and clean or reseat it to check if the fault clears.

  3. 03

    Damaged Wiring Harness

    Part replacement

    Wiring routed through the door hinge area is subject to repeated flexing and can develop breaks or shorts over time. Inspect the harness for any visible damage, pinching, or frayed insulation along its full length.

  4. 04

    Faulty Door Board

    Part replacement

    If the thermistor and wiring both test correctly, the door board itself may be misreading the thermistor signal due to an internal component failure. This is less common but should be considered after other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about F513

What does F513 mean on a GE refrigerator?
F513 indicates that the Door Board Hot Water Thermistor 2 is sending an invalid or mismatched temperature reading to the control system. This thermistor monitors the temperature in the hot water dispensing circuit built into the door. The fault is triggered when the readings from this sensor do not align with expected values, pointing to a sensor, wiring, or door board problem.
Can I fix the F513 error code myself?
A knowledgeable DIYer can start by inspecting the thermistor connector for looseness or corrosion and reseating it, which sometimes resolves the fault. If the connector looks fine, testing the thermistor resistance with a multimeter is the next step. Replacing the thermistor is a moderately involved repair that requires some comfort working with refrigerator door components and wiring.
Will resetting the refrigerator clear the F513 code?
Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the code, but if the underlying issue with thermistor 2 or its wiring is not corrected, the fault will return. A reset is useful for confirming whether the error is intermittent, but it is not a substitute for diagnosing and repairing the actual cause.
Is it safe to keep using my refrigerator while F513 is displayed?
The F513 fault is specific to the hot water dispensing system on the door and does not directly affect the main refrigeration or freezer functions. Food safety should not be immediately compromised, but the hot water feature may not operate correctly. It is still advisable to have the fault addressed promptly to avoid potential secondary issues.
How much does it cost to repair a GE refrigerator F513 error?
If only the thermistor needs to be replaced, parts and labor costs are typically in the range of $75 to $200 depending on your location and service provider. If the door board also requires replacement, the total cost can rise to the $200 to $450 range. Getting a diagnostic visit from a qualified technician will give you a more accurate estimate for your specific situation.

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