Are your wash arms clean? (Have the nozzles in the wash arms clogged?)
Are the wash arms rotating freely? (If food particles are stuck in the arms they won’t rotate freely)
Are you getting chemical into the machine? (You can observe by pushing the primer button) If not check that the chemical line in the pail is fully submersed.
If the chemical line is fully submersed in the pail – then check the squeeze tube it may have fatigued.
Check there are no fractures in the chemical line.
Ensure that the chemical pumps are turning. You can check this by pushing the primer switch and ensuring they are turning.