Machine fills and runs but dishes are not getting clean; heavy soil remains after cycle.

Safety first: Turn off power and allow the machine to cool before disassembling wash arms.

Step-by-step checks:

• Pre-scrap dishes: Ensure operators are scraping heavy food soil before loading racks, as CMA machines are designed for pre-scrapped ware.
• Clean wash arms: Remove upper and lower wash arms. Use a small brush or toothpick to clear each jet. Rinse thoroughly and reinstall, ensuring free rotation.
• Clean strainers: Remove and clean the tank strainer and scrap screens daily. A clogged strainer reduces wash pressure and recirculation.
• Verify detergent: Confirm that the correct commercial detergent for high-temp CMA dishmachines is being used and that the dispenser is functioning. Adjust concentration per chemical supplier’s recommendations.

When to call a technician: If wash pressure remains low after cleaning, a technician should check pump performance, impeller condition, and motor amperage.