If only a little water is coming out of the arms, take a needle or another object that is smaller then the holes to dig the crud out with. Then I would say if that helps, run a dishwasher cleaner through a cycle.
The dishwasher spins by the force of water coming out.
If water is not working, then this is your problem. If water is in working condition, then something might be blocking the dishwasher to spin. Check whether there might be knife, fork, or broken glass or some sort of utensil stuck between the rack.
If water is not working, then this is your problem. If water is in working condition, then something might be blocking the dishwasher to spin. Check whether there might be knife, fork, or broken glass or some sort of utensil stuck between the rack.