Customer Questions and Answers for Thermistor by Whirlpool

Jeff, Yes the thermistor WP8577274 operates in place of the cycling thermostat. It should have a resistance of 10,000 ohms resistance at room temperature. The thermistor is a "NTC" (negative thermal coefficient), the warmer the environment the resistance drops (100 dgrs. F. = 5.0 to 7.0 k ohms resistance). Your most likely issue is the drum moisture sensor bars WP3387223 or the wiring to the control board. If the bars don't sense the moisture in the clothes, or the wiring has a short to ground, the control senses the clothes are dry and shuts off, prematurely. Check the wiring and clean the sensor bars, with rubbing alcohol, then test the sensor circuit at the P2 connector on the control board, it should be an open circuit from each wire to chassis ground, and open circuit across both wires, then when you place something wet or metal across the two bars, there should be a resistance reading across the two wires.