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Error code reference

GE Dryer Error Code THERMISTOR

Thermistor sensor fault detected.

GE codesGE dryer codes

Thermistor sensor fault detected.

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What THERMISTOR means on a GE dryer

The THERMISTOR error code on a GE dryer indicates that the control board has detected a fault condition in the thermistor sensor circuit. The thermistor is a temperature-sensitive resistor that continuously monitors the air temperature inside the drum or exhaust duct during operation. The control board uses resistance readings from the thermistor to regulate heating cycles and protect the appliance from overheating. When the board receives a reading that falls outside the expected resistance range, either too high (open circuit) or too low (short circuit), it triggers the THERMISTOR fault and halts normal operation.

The most common causes of this error fall into two categories: a failed thermistor component and a wiring problem in the thermistor circuit. Thermistors can fail due to heat stress over time, causing them to read incorrectly or lose continuity entirely. Wiring harness issues such as loose connectors, corroded terminals, or chafed insulation can also produce erratic resistance readings that the control board interprets as a fault. In some cases, the control board itself may be misreading a signal from an otherwise functional sensor.

Diagnosing this error requires a multimeter to check the thermistor resistance and compare it against the specified value for the dryer model. A healthy thermistor will show a measurable and consistent resistance that changes predictably with temperature. An open reading or a resistance that does not change with temperature confirms a failed sensor. Technicians should also inspect all wiring connectors in the thermistor circuit for corrosion, looseness, or damage before condemning the thermistor itself.

Source: manufacturer service documentation.

Common causes of THERMISTOR

  1. 01

    Failed thermistor sensor

    Part replacement

    The thermistor itself has failed, producing an open circuit or a resistance reading outside the acceptable range. Testing with a multimeter will show no continuity or a fixed resistance that does not change when the sensor is warmed.

  2. 02

    Loose or disconnected wiring connector

    Wiring / connection

    The connector plug attaching the thermistor to the wiring harness may have worked loose, causing an intermittent or absent signal. Inspect the connector at the thermistor and at the control board for secure seating.

  3. 03

    Corroded or damaged wiring

    Wiring / connection

    Moisture or heat exposure can cause corrosion at the thermistor terminals or damage to the wire insulation, creating a short or open in the circuit. Visually inspect the wiring harness for discoloration, fraying, or green corrosion at the terminals.

  4. 04

    Restricted airflow causing thermal stress

    Wiring / connection

    A clogged lint filter or blocked exhaust duct can expose the thermistor to extreme heat repeatedly, accelerating its failure. Check the lint trap and exhaust vent path for blockages before replacing the sensor.

  5. 05

    Faulty control board

    Part replacement

    If the thermistor and all wiring check out correctly, the control board may be misinterpreting the sensor signal due to an internal failure. This is the least common cause and should only be considered after ruling out all sensor and wiring issues.

See the test procedure for each cause

Frequently asked questions about THERMISTOR

What does THERMISTOR mean on a GE dryer?
The THERMISTOR code means the dryer control board has detected a fault in the thermistor sensor circuit. The thermistor monitors internal temperature to regulate heating, and when its resistance reading falls outside the expected range, the dryer stops operating and displays this error. The fault can originate from a failed sensor, damaged wiring, or a loose connector in the circuit.
Can I fix the THERMISTOR error on my GE dryer myself?
A knowledgeable DIYer can often resolve this error by inspecting the wiring connectors and testing the thermistor with a multimeter. If the thermistor tests as open or reads a fixed resistance that does not respond to temperature changes, replacing the sensor is a straightforward repair that requires basic hand tools and electrical safety precautions. Always unplug the dryer before inspecting or replacing any components.
Is it safe to run my GE dryer when the THERMISTOR error is showing?
No, you should not operate the dryer while the THERMISTOR error is active. The thermistor is a key safety sensor that prevents the dryer from overheating, and running the appliance without a functioning sensor removes an important thermal protection. Continued operation could result in damage to the dryer or create a fire risk.
How much does it cost to fix a THERMISTOR error on a GE dryer?
If only the thermistor sensor needs replacement, parts typically cost between $10 and $40 depending on the model, making it one of the more affordable repairs. If a technician performs the repair, expect to pay between $100 and $200 total including labor. If the control board is the root cause, parts alone can range from $100 to $300 or more, and total repair costs will be significantly higher.
Will resetting my GE dryer clear the THERMISTOR error code?
Unplugging the dryer for a few minutes may temporarily clear the error code, but it will return as soon as the control board detects the same fault condition again during operation. A reset does not address the underlying problem in the thermistor or its wiring circuit. Permanent resolution requires identifying and correcting the actual fault, whether that means repairing wiring, replacing the thermistor, or addressing another root cause.

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