Sanitizing failure; display shows E15 indicating final rinse temperature or time did not meet sanitizing requirements.

Safety first: Disconnect power before accessing internal components. Be cautious of hot water and steam.

Step-by-step checks:

• Verify final rinse temperature: Use a calibrated thermometer or test strip to confirm that final rinse temperature meets CMA’s sanitizing specification.
• Check booster operation: Ensure the booster heater is powered, not tripped on high-limit, and that elements are functioning (see booster-related steps under E4).
• Inspect rinse spray pattern: Remove and clean rinse nozzles to ensure full coverage and adequate volume.
• Confirm cycle timing: Verify that the machine is not being interrupted mid-cycle and that the programmed rinse time matches CMA specifications.

When to call a technician: If sanitizing failures persist after cleaning and basic checks, a technician should verify temperature sensors, control programming, and booster performance.