Display shows E18 and pump cannot detect water flow through integrated Flowclear saltwater system (if combined unit).

Safety first: Turn off and unplug the pump/salt system combo before opening the cell housing.

Steps:

• 1. Inspect cell housing: Remove the Flowclear salt cell housing cap and check for debris or scale buildup restricting flow. Clean according to the manual (often with a mild acid solution for scale).
• 2. Remove air: Ensure the housing is completely filled with water and that there are no high points in the hoses where air can accumulate.
• 3. Increase pump speed: On variable-speed models, run the pump at a higher speed to ensure adequate flow through the cell.
• 4. Check flow switch: Inspect the in-line flow switch inside the cell housing for free movement. If stuck or damaged, replace the Flowclear flow switch.
• 5. Retest: Reassemble, ensure all O-rings are seated, and restart the system. If E18 persists with strong flow, the flow switch or control PCB may be faulty.