What It Means
Flow Switch / No Water Flow
Likely Causes
- Circulation pump not running
- Flow switch failed open
- Water flow below minimum threshold (~20 GPM)
- Dirty filter restricting flow
- Closed water valves
Next Checks
- Confirm pool pump is running at adequate speed
- Open all water valves feeding the heat pump
- Check and clean filter — a dirty filter is a common flow culprit
- Test flow switch continuity — if open with confirmed good flow, flow switch replacement needed
- Verify minimum GPM per model spec sheet
Verify Before Repair
SplashLens is a field reference, not a repair guarantee. Confirm the visible code, exact model, and current manufacturer procedure before replacing parts, bypassing safeties, or quoting a customer.
SplashLens is independent and is not affiliated with AquaCal or other equipment manufacturers.
Use SplashLens At The Pad
Manual error-code lookup works after the app has loaded once. AI scan features require internet and should be treated as a second set of eyes.