Customer Questions and Answers for Washer Timer by Whirlpool

Emma, Most likely, you didn't lock the knob in place. You'll need to remove power to the washer, flip the control panel up and over so you can access the back of the new timer. In the opening in the back of the timer you should see a "D" shaped, half round plastic "button" , align and place the timer knob onto the forked timer shaft on the front of the timer and hold it in place. use a small bladed tool and push in on the "D" shaped button until it stops on it's own. Then push and pull the timer knob several times to make sure the knob is locked on and in place. The video attached to part number WP3951702 may also be helpful. Thanks,