Maytag Washer fills then stops

When I start the washer, it will fill with water, then it will not start the wash cycle. The timer will continue to go and will go to off, but the wash and spin never start. If I slowly move the inner dial, the wash and or spin cycle sometimes will start. My guess is that it is the timer control but I would like another opinion before I get the part which is part #22001025. Thanks for any help you can give me.