If your washer starts agitating right away when you start it, then you may have a bad auto load sensing switch. Grand Master appl.tech.29501 enlightens us on how to test it:
You can test it by removing the 2 connectors from the load sensing switch
and then turn the machine on in the fill or wash cycle....no agitation = bad load sensing switch.
If the machine still immediately agitates with the wires disconnected from the load sensing
switch the you have a bad timer....also another problematic part with this washer.
If your feeling really lucky..I've had 2 cases when both parts are bad.....
Part link for the auto load sensing switch ==> http://www.repaircli...umber=W10177795
Source: Kenmore 800 (110.298222801)