thermistor thermostat 40 could be implemented with a single stage heating element as a result of this function of the thermistor the thermostat is prevented from reaching its trip temperature thus preventing long dry times due to thermostat cycling with reference to fig4 the combined sensor 40 described above is shown in a gas dryer 10 u2032 the gas dryer 10 u2032 is provided generally with a heater box 30 u2032 a drum 60 u2032 a blower 80 u2032 and an exhaust 90 u2032 the heater box 30 u2032 is provided with an inlet 32 u2032 through which inlet airflow 20 u2032 passes and a drum inlet grill 34 u2032 through which heated air exits the heater box 30 u2032 and enters the drum 60 u2032 of the dryer 10 u2032 the air is heated in the heater box 30 u2032 by burner 38 u2032 that is controlled by a bi level gas valve the blower 80 u2032 draws the air out of the drum 60 u2032 through a lint screen 70 u2032 and eventually through the exhaust 90 u2032 of the dryer as exhaust airflow 120 u2032 the dryer 10 u2032 further includes a thermal cut off 50 u2032 and a thermal fuse 110 u2032 the thermal cut off 50 u2032 ensures a safe condition in the event of a burner or gas valve failure the thermal fuse 110 u2032 removes power to the drum motor thus stopping the airflow and containing any combustible material from being vented outside of the dryer the gas dryer 10 u2032 is provided with a number of sensors for detecting the temperature of the airflow in the dryer a combined thermistor thermostat unit 40 is located in the inlet 32 u2032 of the heater.