How do i clear the code " ts" after replacing thermister Thank you

The error "tS" actually means the thermistor is shorted. It flashes when the thermistor is indeed shorted, the thermistor wires are shorted, or the timer/control is faulty. There's no necessity to reset the machine. The problem here is not the thermistor but a shorted wire or a faulty timer/control. One simple way to find out is by disconnecting the thermistor and insulating the wire terminals then starting the dryer. If the error code does not vanish, then it is proven with moral certainty that there is a wire short circuit or a timer/control problem. Check and make sure that there's no such wire short circuit or no part of which is touching the dryer cabinet then if the error is still there, disconnect the wire harness from the the timer control. The timer/control is indeed faulty if the error code persists even after the wire harness is disconnected therefrom.

You have a faulty thermistor if the error code vanishes after the thermistor is disconnected. Normal thermistor resistance is around 10000 ohms at room temperature.