If your washing machine is stuck on one cycle and doesn’t advance, the timer is broken. Replacing a timer is simple, but it’s not cheap. A new one will run about $120. Still, that’s less than a new washer.
Photos 1 and 2 show how to remove the old timer. To start, unplug the machine and remove the control knob. On this Maytag washer, you pry off the plastic disc in the center of the knob to reveal a clip that holds the knob. Arrange the parts in order as you take them off so reassembly will be easier. Photo 3 shows how to install the new timer. Contact the manufacturer of your washer or the local appliance repair parts store to find a new timer.