Raypak Pool Heater WPS Stuck Closed / Water Sw Open Error Code

Updated 2026-08-29 · review status: manual-verified Last verified: 2026-08-29

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

  1. Causes not yet documented — verify against the service manual.

Parts & supplies for Raypak Pool Heater: filters, control boards, sensors, and common replacement parts.

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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