My 13 yr. old Whirpool washer LA9500XTW1 stopped mid-cycle with the tub full of water. After trying several times to restart by pushing/pulling knob, it started and completed the cycle including rinse and spin, without any problem. But now I can't get it to start a new load on any part of any cycle. It won't fill at all. I thought it must be the timer, but that's $85 to replace and I can't return it if I'm wrong. Any ideas/suggestions?