Raypak Pool Heater WPS Stuck Closed / Water Sw Open Error Code
Quick answer
The water-flow switch does not match the current operating state.
Severity: high · DIY difficulty: intermediate
Safety
TBD - must be written per-code before publish
What WPS Stuck Closed / Water Sw Open means
The water-flow switch does not match the current operating state.
Code meaning varies by series
- X94 / SR-410 (Professional Series Digital): WPS Stuck Closed: valves not operated because the water flow switch is closed and Valve Chng Delay is enabled. Water Sw Open: heat not running because the water flow switch is open.
Causes, ranked
Causes not yet documented — verify against the service manual.
Parts & supplies for Raypak Pool Heater: filters, control boards, sensors, and common replacement parts.
Sources
- PoolDial error-code reference (manual-backed) — verified 2026-08-29
- Raypak Professional Series X94 Installation & Operation Manual (241494), Table N Error Condition Messages — verified 2026-08-29