Display shows CF or CLn reminder; prompts for filter cleaning

Possible Causes

Scheduled filter cycle count reached, Time-based maintenance reminder

How to Fix / Troubleshooting

• Clean filters: Remove all Michael Phelps Spas filter cartridges and rinse thoroughly with a garden hose. Use a filter cleaner solution periodically to remove oils.
• Reset reminder: Follow the owner’s manual instructions to clear the CF/CLn reminder (often by pressing a specific button sequence on the topside control).