Raypak Pool Heater Heater cycles on and off continuously Error Code

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

Quick answer

Clean or replace a dirty filter, raise a low pool water level, adjust the external bypass, or adjust an out-of-spec pressure switch.

Severity: high · DIY difficulty: intermediate

Safety

TBD - must be written per-code before publish

What Heater cycles on and off continuously means

Clean or replace a dirty filter, raise a low pool water level, adjust the external bypass, or adjust an out-of-spec pressure switch.

Code meaning varies by series

  • Digital 206A-406A / Low NOx / Professional / Above-Ground: Dirty filter (clean or replace), low pool water level (raise), external bypass out of adjustment, or pressure switch out of adjustment.

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 Digital 206A-406A Installation & Operation Manual (241236), Section 10 Troubleshooting — verified 2026-08-29