Dishwasher displays C9; may indicate abnormal drain or circulation behavior late in the cycle.

Safety: Disconnect power and shut off water before servicing.

Steps:

• 1. Clean filters and spray arms: Remove and thoroughly clean all filters and spray arms to ensure proper water flow.
• 2. Inspect sump and chopper area: Check for debris around the circulation pump inlet and any integrated chopper/grinder components.
• 3. Verify drain performance: Run a cancel/drain and observe how quickly water leaves the tub. Slow draining suggests a partial blockage or weak pump.
• 4. Listen for pump behavior: During wash, listen for the circulation pump cycling off unexpectedly or making unusual noises.
• 5. Replace suspect pump: If either the circulation or drain pump is noisy, intermittent, or hot to the touch (with power off), replacement is recommended.

Because C9 can be a general circulation/drain fault, if cleaning and pump replacement do not resolve it, a control board diagnosis by a technician may be needed.