Pentair ETI400 Stack Flue Sensor Replacement Kit | 475601
The Pentair ETI400 Stack Flue Sensor Replacement Kit (475601) is a genuine replacement sensor assembly designed for the Pentair ETI400 Series Condensing Gas Heater. The stack flue sensor monitors exhaust temperature and combustion conditions, helping the heater’s control system maintain safe, efficient operation and protect internal components.
What This Part Is For
This replacement sensor is specifically made for the Pentair ETI400 Condensing Gas Heater. Replace it when the original flue sensor fails, reads out of range, or triggers error codes—issues that can lead to inefficient combustion, shutdowns, or false safety trips.
Features & Benefits
- OEM replacement stack flue temperature sensor for ETI400 heaters
- Helps maintain efficient and safe combustion performance
- Prevents false shutdowns or error conditions due to bad sensor readings
- Durable design for long-term service in heater environments
Installation Notes
- Turn off power and gas supply before servicing
- Remove the old sensor and install the replacement in the same position
- Ensure connectors and wiring are secure to prevent poor readings
- Test heater operation after replacement to confirm proper function
Maintenance Tips
- Inspect the sensor wiring and connector during routine service
- Clean surrounding flue areas if soot or buildup is present
- Replace at the first sign of erratic temperature readings or service codes
Related Products
- Pentair ETI400 Condensing Gas Heater– The main heater model that this sensor kit supports.
- Pentair ETI400 Service Kit– General maintenance kit with common service parts for the ETI400 heater.
- Pentair ETI400 Condensate Neutralizer Replacement Kit– Kit to neutralize acidic condensate and protect drain lines.
- Pentair ETI400 Indoor Direct Air Intake Kit– Accessory kit for indoor installations requiring dedicated airflow.
