E27
Pentair
Intermittent Flame Sense / Flame Dropout
Heater displays E27 and shuts down, often intermittently.
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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
Marginal flame sensor signal, Poor ground connection, Partially blocked burners, Fluctuating gas pressure
How to Fix / Troubleshooting
Safety: Turn off power and gas before cleaning or adjusting combustion components.
- Clean flame sensor: Remove and gently clean the flame sensor rod with fine abrasive pad to remove oxidation.
- Verify grounding: Ensure the heater chassis is bonded and grounded per code. Tighten ground lugs and clean any corroded connections.
- Inspect burners: Check for rust flakes, spider webs, or debris in burner ports. Burner removal and cleaning should be done per Pentair instructions.
- Gas supply check: Have a gas technician verify stable gas pressure under load. Correct any supply issues.
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Repair Difficulty
Hard
4/5
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