Maytag Dryer Error Code tS

The tS error code on a Maytag dryer indicates that the control board has detected an abnormally low resistance reading from the thermistor, a condition interpreted as a short circuit within the sensor circuit. The thermistor is a temperature-sensitive resistor that continuously monitors drum air temperature and feeds that data to the control board. When resistance drops well below the expected range, the board flags this as a fault rather than a valid temperature reading, preventing normal operation to avoid potential overheating.

A shorted thermistor typically reads near zero ohms or far below the expected resistance curve for a functioning sensor. This is the opposite of an open circuit fault, where resistance reads very high or infinite. In a healthy thermistor, resistance decreases as temperature rises in a predictable, calibrated manner. A short can result from internal sensor failure, damaged wiring that has allowed conductors to contact each other, or moisture intrusion into the sensor connector. Before replacing any components, technicians should also check for diagnostic code 1, which may point to additional underlying conditions.

Restricted airflow from a clogged lint screen or blocked vent system can cause extreme heat buildup in the drum, which may stress thermistor components over time, though a shorted thermistor is more commonly a wiring or sensor failure issue. Always inspect the vent path and lint screen as part of the initial assessment, since these checks are low-cost and can rule out thermal stress as a contributing factor before moving on to component-level diagnosis.