I have a Kenomore washer model no 110.20722990 The timer knob seems to get stuck or will not move. Started a load at the 10 minute mark and the it washed and agitated and the knob moved to the 6 min mark and stopped. The tub was full of water. Had to Manually move knob to half way to rinse. The tub drained and began to spin. Kept spinning So had to mnaually move knob to rinse. Tub filled with water, stopped heard click noise, nothing happened and knob did not move. Manually moved knob one click , it began to agitate about 4 minutes then stopped. Had to manually move knob to spin, the water drained, spun and knob moved by itself to off and stopped. Thanks for any help.