Zodiac
Flame Sensing Intermittent / Marginal Flame Signal
Zodiac pool heater ignites but then shuts off after a few seconds without an error code.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Weak flame due to low gas pressure, Dirty flame sensor, Poor ground connection, Burner misalignment
How to Fix / Troubleshooting
Safety: Turn off power and gas before servicing ignition or burner components.
- Clean flame sensor: Remove and gently clean the flame sensor rod with fine abrasive pad. Reinstall ensuring it is fully in the flame.
- Check ground connections: Verify that the burner tray and control board ground wires are securely attached to clean metal surfaces.
- Inspect burner alignment: Ensure burners are properly seated and flames are stable and fully engulf the sensor.
- Evaluate gas supply (pro): Have a technician verify gas pressure and correct any supply issues that could cause weak flame.
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Repair Difficulty
Hard
4/5
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