Whirlpool Dryer Error Code tS

The tS code stands for Thermistor Short and means the control board is detecting an unusually low resistance reading from the thermistor, which is the dryer's temperature sensor. This signals that either the thermistor has failed internally, the wiring to it is shorted, or a connector is bridging the circuit incorrectly. The dryer displays this fault to prevent running a cycle without reliable temperature data.

It is not recommended to continue running the dryer while the tS code is active. The thermistor provides the temperature data the control board needs to prevent overheating, and operating without a reliable reading could allow the drum to reach unsafe temperatures. Resolve the fault before resuming normal use.

If only the thermistor needs replacement, parts typically cost in the range of $15 to $50 depending on the model, making it one of the more affordable dryer repairs. If a professional technician is needed, labor costs will add to that figure, generally bringing the total to somewhere between $100 and $200. Control board replacement, if required, is significantly more expensive and falls in a higher range.

Many DIYers can address this code by first cleaning the lint screen and checking the exhaust vent for blockages, then testing the thermistor resistance with a multimeter. If the thermistor reads near zero ohms, replacing the thermistor is a relatively straightforward repair. Wiring inspection and connector cleaning are also within reach for someone comfortable working on appliances.

A power reset may temporarily clear the display, but the tS code will return if the underlying problem is not corrected. The fault is triggered by a real electrical condition in the thermistor circuit, so clearing it without repair does not fix the issue. Always check for diagnostic code 1 as well, since it may provide additional fault context.