My kenmore washer model 110.28934790 is intermittently working during the draining and spinning cycles. One time it will work fine through the whole wash and spin cycle then the next time it will stop midway prior to the rinse cycle and not drain the water from the tub. The timer will advance all the way to the end of the spin cycle but the machine does nothing. The tub is full of water. The lid switch checks out fine. The machine isn't making any weird noises. Can it be the timer? Not sure what to check. Thanks for your help.