Pentair Pool Heater ERR IGN Error Code

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

Quick answer

Ignition Failure Heater attempted to light 3 times and failed to establish a flame. Blower runs and igniter fires but no combustion occurs. Gas supply off or pressure too low, clogged burner orifice, cracked or fouled igniter, incorrect spark gap, failed gas valve solenoid, air in gas line after service. Verify the manual gas shutoff valve is open (handle parallel to pipe). Confirm other gas appli

Severity: high · DIY difficulty: intermediate

Safety

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What ERR IGN means

Ignition Failure Heater attempted to light 3 times and failed to establish a flame. Blower runs and igniter fires but no combustion occurs. Gas supply off or pressure too low, clogged burner orifice, cracked or fouled igniter, incorrect spark gap, failed gas valve solenoid, air in gas line after service. Verify the manual gas shutoff valve is open (handle parallel to pipe). Confirm other gas appliances are working. Power-cycle the heater to clear the lockout and allow a fresh retry. If gas is confirmed but ERR IGN persists, a technician must inspect the igniter and gas valve.

Causes, ranked

  1. 1. Gas supply off, or insufficient gas pressure/volume common diy-ok

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  2. 2. Failed igniter occasional pro-only

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  3. 3. Failed ignition control module occasional pro-only

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    Fix:

Parts & supplies for Pentair 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
  • Pentair MasterTemp/Max-E-Therm Heater Installation & User's Guide (Section 5 Troubleshooting) — verified 2026-08-29