Roper dryer takes a minute to start then shuts off

his is probably the motor going bad. The sensors wont cause this to happen. The start switch either, replacing all the sensors in the world wont make the motor be good again. But their is something you can do to try and make the motor last a while longer,their isn't any holes to oil the dryer motor so you must make some,using a 1/8th inch drill bit make a hole in either end of the motor where the bearings are (taking care not to hit the shaft), then add some hi temp oil such as zoom-oil, (dont use WD-40) and work the motor free as you can by hand. If this frees up the motor it may go a while longer. Also oil the rollers and check the slides to make sure they are not pinching and stalling the motor. If the motor can't reach top speed it will get hot,overload and stop.