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Error code reference

GE Dryer Error Code tS

Thermistor short

GE codesGE dryer codes

Thermistor short - thermistor voltage is over 4.8 VDC for more than 5 seconds.

First step from the service manual

Check the PCB, wire, and thermistor.

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

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What tS means on a GE dryer

The tS error code on a GE dryer indicates a thermistor short condition. Specifically, the control board has detected that the thermistor signal voltage has exceeded 4.8 VDC and remained above that threshold for more than 5 continuous seconds. The thermistor is a temperature-sensing resistor located in the dryer's airflow path, and it works by changing its resistance value in response to heat. The PCB interprets this resistance change as a corresponding voltage signal. When the voltage climbs above 4.8 VDC and stays there, the board interprets this as a short circuit condition in the thermistor circuit rather than a valid temperature reading.

Under normal operation, the thermistor's resistance decreases as temperature rises, producing a predictable voltage within an acceptable range. A short circuit in the thermistor or its wiring forces voltage artificially high, disrupting the control board's ability to regulate drying temperatures accurately. This can prevent the dryer from operating safely, since accurate temperature monitoring is essential for both performance and overheat protection.

Diagnosis should begin by inspecting three components in sequence: the PCB itself, the wiring harness running between the PCB and the thermistor, and the thermistor component. Look for signs of chafed, pinched, or melted wiring insulation that could cause a short to voltage. The thermistor itself can be tested with a multimeter to verify its resistance is within the expected range for the ambient temperature. A failed PCB producing a false voltage reading is less common but should be considered if wiring and the thermistor both test within spec.

Source: manufacturer service documentation.

Common causes of tS

  1. 01

    Faulty thermistor

    Part replacement

    The thermistor itself may have developed an internal short, causing it to send an abnormally high voltage signal to the PCB. Testing the thermistor with a multimeter for proper resistance at room temperature will confirm whether it has failed.

  2. 02

    Damaged or shorted wiring harness

    Part replacement

    The wiring between the thermistor and the control board may be chafed, pinched, or melted, causing a short circuit that drives the voltage signal above 4.8 VDC. Visually inspect the entire wire run for damaged insulation or contact with hot surfaces.

  3. 03

    Poor or corroded connector connections

    Wiring / connection

    Loose or corroded connectors at the thermistor or PCB can introduce resistance irregularities that affect voltage readings. Disconnect and inspect each connector for corrosion, bent pins, or incomplete seating.

  4. 04

    Failed PCB

    Part replacement

    If the thermistor and all wiring test correctly, the control board itself may be producing a false voltage reading or misinterpreting the thermistor signal. This is less common but should be evaluated after ruling out the sensor and wiring.

See the test procedure for each cause

Frequently asked questions about tS

What does tS mean on a GE dryer?
The tS code on a GE dryer stands for thermistor short. It means the control board has detected that the thermistor signal voltage has gone above 4.8 VDC for more than 5 seconds, which indicates a short circuit in the temperature sensor circuit. The dryer will not operate normally until this condition is resolved. The thermistor, its wiring, and the PCB all need to be inspected.
Will resetting my GE dryer clear the tS error code?
A reset may temporarily clear the tS code, but the error will return if the underlying fault is not repaired. Since the code triggers when voltage exceeds 4.8 VDC for more than 5 seconds, any short circuit still present in the thermistor or wiring will cause the code to reappear quickly. A proper repair of the faulty component is required for a lasting fix.
Is it safe to use my GE dryer when the tS code is displayed?
It is not recommended to operate the dryer while the tS code is active. The thermistor is responsible for monitoring drum temperature, and a shorted thermistor means the control board cannot accurately track heat levels. Running the dryer without a functioning temperature sensor could lead to overheating or damage to clothing and internal components.
How do I fix the tS error on a GE dryer?
Start by inspecting the wiring harness between the thermistor and the PCB for any signs of damage, pinching, or melting. Next, test the thermistor with a multimeter to check whether its resistance is within a normal range at room temperature. If the thermistor has failed internally, it will need to be replaced. If wiring and the thermistor both test correctly, the PCB should be evaluated as the source of the fault.
How much does it cost to fix a tS error on a GE dryer?
Repair costs vary depending on which component has failed. A replacement thermistor is generally an inexpensive part, often in the range of $15 to $40, while professional labor for diagnosis and replacement typically adds $75 to $150. If the control board is the root cause, parts alone can range from $100 to $300 or more depending on the model, with additional labor costs on top.

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