Pentair ETI400 Stack Flue Sensor Replacement Kit | 475601
Pentair
SKU: 475601Z
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.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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