Also try this,Unscrew the Agitator and lift out of the Drum. Look and see if there is a small object caught up under that Agitator. I had a similar problem but ended up being 50.00 in cash that I had accidentally washed that got out of my pants pocket and up into the bottom of that Agitator and fixed the problem PLUS BONUS $$$
I think that my washing machine is on its last leg! Some days it spins, others it doesn't. If it doens't spin, all I have to do is tip it, hit it, pound on it, and then try again and it works! Any suggestions on why this is happening?