Product review (5 stars): Fixes various problems with top load auto fill washers
If you're reading this, you have a top load washer that uses this sensor/switch.  Symptoms of problems where this switch is the culprit include:
1 - Washer starts agitating and filling the moment you turn it on (should fill first, then agitate)
2 - Washer does not start when you pull the timer switch
You might be able to get the washer working by blowing compressed air into the sensor port (where the plastic tube attaches) on this switch.  That has worked twice for me after encountering the 2 above problems.  I'm replacing the sensor/switch to hopefully eliminate the problems.
Be careful when removing the switch from the control panel (check youtube for some videos, search using the part #).  It has a positioning tab and if you just twist the switch body, you might break it off (which I did).  Release the tab from its catch, then twist the body to remove from the panel.