Product review (5 stars): Saved a lot of money and fixed the agitate while filling with water problem
Our Whirlpool washing machine started agitating while filling with water.  The Sears technician quoted $294 to replace the switch of which $125 was the switch!  This was above and beyond his exorbitant $79.88 diagnostic fee.  I promptly declined.  I researched the washing machine symptoms on the web and learned it was really easy to replace the switch.  So, I ordered a new Whirlpool W10248240 Sensor Switch on Amazon.com for $53 and replaced the old one.  It took less than five minutes.  The problem was fixed and has not returned in the month since I replaced the switch.  Use the instructions on the web to replacing the switch.  The instructions that come with the part are a bit ambiguous.