The spray arm on my Bosch dish washer is not spinning can anyone help. thanks?

It could be hitting something that you are now seeing.





OR it might be calcium in your water that has collected inside the sprayer and is stopping it from moving.





I'm sure you will need to call a professional to fix it, but try running it through a cycle with a cup of vinegar poured into a water filled tub (without dishes). Slowly open the door and pour in the vinegar. If this works for you, start pouring in 1/2 cup vinegar in the last rinse cycle after the tub is filled with water each time you wash dishes.The spray arm on my Bosch dish washer is not spinning can anyone help. thanks?
I've had the same problem with a Bosch. I took the arm off (It can easily be removed) and found two grains of rice were being spun into the end hole, as soon as the arm stopped spinning due to the unbalanced water flow the rice grains dropped back into the arm and couldn't be seen in the hole. I removed the debris (shook it out hard) and the problem was resolved. Any debris inside the arm appears to have the effect of stopping the arm from spinningThe spray arm on my Bosch dish washer is not spinning can anyone help. thanks?
If the holes in it have lime scale that will stop the water as it is water pressure that makes it spin.
make sure it's not hitting anything.