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Error code reference

Amana Dryer Error Code tS

Thermistor short sensed

Amana codesAmana dryer codes

Thermistor short sensed - the thermistor resistance is very low.

First step from the service manual

Check for clogged lint screen, restricted vent system, and check thermistor resistance. Check for diagnostic code 1.

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 Amana dryer

The tS error code on an Amana dryer indicates that the control board has detected a thermistor short condition. The thermistor is a temperature-sensing resistor located in the dryer's airflow path that continuously monitors exhaust or drum air temperature. When the thermistor's resistance drops to an abnormally low level, the control board interprets this as a short circuit in the sensor circuit and triggers the tS fault code. A properly functioning thermistor changes resistance predictably with temperature, so a reading that is far below the expected range signals either a failed sensor or a wiring problem.

The most immediate diagnostic concern when this code appears is airflow restriction. A clogged lint screen or blocked vent system can cause the dryer to overheat, which may stress the thermistor and related components. Before condemning the thermistor itself, the vent path from the drum to the exterior exhaust termination should be inspected and cleared. The lint screen should also be cleaned thoroughly, as even a partially blocked screen can restrict airflow enough to affect temperature sensor readings.

If airflow is confirmed to be clear, the thermistor itself should be tested with a multimeter. A shorted thermistor will show resistance far below the normal operating range, often near zero ohms. The wiring harness and connector pins between the thermistor and control board should also be inspected for pinched wires, damaged insulation, or terminals that have bridged together. Additionally, the first diagnostic step references checking for diagnostic code 1, which may provide further context about the fault and should be retrieved from the control board before parts are replaced.

Source: manufacturer service documentation.

Common causes of tS

  1. 01

    Failed thermistor

    Part replacement

    The thermistor itself has internally short-circuited, causing resistance to drop far below the normal range. Testing with a multimeter will show near-zero or very low resistance regardless of temperature.

  2. 02

    Shorted or damaged wiring harness

    Wiring / connection

    The wires between the thermistor and the control board may be pinched, melted, or have damaged insulation causing two conductors to contact each other. Inspect the harness along its full routing path for visible damage.

  3. 03

    Clogged lint screen or restricted vent system

    Wiring / connection

    Blocked airflow causes excessive heat buildup that can damage the thermistor and associated wiring over time. Clean the lint screen and inspect the full exhaust vent path to the exterior termination point.

  4. 04

    Corroded or bridged connector terminals

    Wiring / connection

    Moisture or lint accumulation in the thermistor connector can cause terminals to corrode and bridge together, simulating a short circuit. Inspect the connector body and pins for contamination or contact between terminals.

  5. 05

    Faulty control board

    Part replacement

    If the thermistor and wiring both test correctly, the control board's sensor input circuit may have failed and is misreading the thermistor signal. This is the least common cause and should be diagnosed only after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about tS

What does tS mean on a Amana dryer?
The tS code means the dryer's control board has detected a thermistor short, meaning the thermistor's resistance has dropped to a very low level that falls outside the normal operating range. The thermistor is the component responsible for monitoring air temperature inside the dryer. This fault causes the dryer to stop operating until the condition is diagnosed and resolved. Checking airflow restrictions and testing thermistor resistance are the recommended first steps.
Can I fix the tS error code myself?
Some causes of the tS code are DIY-friendly, such as cleaning a clogged lint screen or clearing a blocked vent duct. Testing the thermistor requires a multimeter and basic knowledge of resistance measurements. If the thermistor or wiring harness needs to be replaced, a mechanically inclined homeowner can often complete the repair, though comfort with appliance disassembly is helpful.
Is it safe to keep using my dryer when the tS code is showing?
It is not recommended to continue operating the dryer while the tS error is active. Because the thermistor monitors temperature, a shorted sensor means the control board cannot accurately detect overheating conditions. Running the dryer without reliable temperature sensing creates a potential fire hazard, particularly if the underlying cause is also an airflow restriction.
How much does it cost to repair the tS error on an Amana dryer?
If only the lint screen needs cleaning or the vent needs clearing, there may be no parts cost at all. Replacing a thermistor typically costs between $15 and $50 for the part, plus labor if a technician is hired. A full service call including diagnosis and parts can range from $100 to $250 or more depending on the specific fault found and local labor rates.
Will resetting my Amana dryer clear the tS error code?
Resetting the dryer by disconnecting power may temporarily clear the tS code, but the fault will return if the underlying problem has not been fixed. Because the control board detects the short condition during operation, the code will reappear as soon as the thermistor circuit is read again. A proper repair addressing the thermistor, wiring, or airflow restriction is necessary to permanently resolve the fault.

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