moisture sensor not coming on

Either the belt is broken on the unit or the thermal fuse that is mounted to the blower housing is burned out. You should remove the top to find out if the belt is broken on the drum. You need to remove the screws along the back edge of the top then it will slide straight back and lift off. You will see the drum, look in the middle of the drum for the belt it should be there and attached tight. If that is attached but loose it has come off the idler pulley and that will likely need to be replaced. If the belt is tight on the drum then you’ll have to disassemble the unit to check the blower thermal fuse out. There is a thermal fuse on the backside of the blower housing in the unit that will often burn out causing it not to run. Either way you will have to take the unit apart to either put a belt on it or check that thermal fuse out.