Hayward pool heater diagnostics
Hayward heaters can lock out from ignition faults, sensor readings, blocked airflow, poor water flow, control board problems, or gas supply issues. We test the system step by step before recommending parts.
- Ignition lockout and flame failure checks
- Temperature sensor and limit diagnostics
- Pressure switch and flow verification
- Gas valve and control board testing
- Burner and heat exchanger cleaning
Repair or replacement advice
If a Hayward unit has repeated board failures, corrosion, leaking headers, or a damaged heat exchanger, replacement can be the better option. If the heater is clean and structurally sound, repair is usually worth checking first.