Product review (5 stars): EUREKA !  It Works Perfectly
Our 8 year old Whirlpool washer would start immediately agitating when turned on, and no water fill at all. After a bit of googling the evidence led to a faulty water sensor switch. I tried several online appliance parts sites and the prices ranged from $72 to $90. Then I did another search and to my surprise found Amazon was selling the part as well for a much lower price comparatively. Ordering from Amazon seemed like the right bet. And to my delight the switch was the answer to the problem.
  This switch is an exact replacement (the package says "Genuine Whirlpool Quality" for the one its replacing.
One more thing. I have to thank Amazon with a resounding applause for getting this part to me in just one day. This whole event could have taken a lot more time and been more expensive. Amazon made it a quick, simple, and cheap little ordeal.