Dryer stops in the middle of cycle. It is not the door switch

There's not much here to work with. Is your dryer gas or electric? Do any of your clothes get dry? When you check inside, does if feel like it was warm when it turned off? How long does it run? My first guess would be the cycle timer. But you need to note if the drum was actually spinning and if the heat came on. If so, and everything was normal before it failed I'd go with the timer. If not ,there is another issue like a a safety switch for gas dryers which will not open the gas valve when the glow bar doesn't come up to temperature. Lastly, note where the dial points when it fails and most modern dryers have other cycle dials. Try one of those and see if it stops there too. You might just have a dead spot on the time because that is what you always use.