Could be a jammed pump or the pump needs to be replaced. I once worked on a new washer that just stopped pumping. Found a piece of wood about the size of a match stick jamming the impeller of the pump. A lot of time the pump just stops working and can be replaced entirely. Probably not a real expensive part and you just need labor to put it in if you can find repair instructions. You'll have to decide if the price of the part is justified for the age of the machine.
Ken in Glassboro, NJ
Ken in Glassboro, NJ