Unscrew the upper and lower wash and rinse arms.
Add commercial deliming solution directly into the wash tank according to the manufacturer’s instructions. Run 3 to 4 complete wash cycles without any dishes. fagor fi-80 dishwasher manual
Check the plastic and stainless nozzles for hard water scale or food debris. Clean them out using a paperclip or a small pick. Unscrew the upper and lower wash and rinse arms