Pentair 475601 ETi400 stack flue sensor replacement kitPentair ETi400 Stack Flue Sensor Replacement Kit, 475601 In stock$7199
Pentair 475601 ETi400 stack flue sensor replacement kit
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Pentair ETi400 Stack Flue Sensor Replacement Kit, 475601

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$7199
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Quick overview

  • Genuine Pentair Factory kit 475601, not a generic thermistor.
  • For the ETi400 Built for the Pentair ETi400 high efficiency pool heater.
  • Stack flue position Reads the temperature of the flue gas leaving the heat exchanger.
  • Supplied as a kit Comes as a replacement kit rather than a loose sensor.
  • Clears sensor faults A failed stack sensor is a common reason an ETi400 locks out and refuses to fire.
  • Direct swap Replaces the original sensor in the same location, no heater modification.
Full description and specifications ↓

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Product details

The Pentair 475601 is the stack flue sensor replacement kit for the ETi400 pool heater. It is the genuine Pentair part, supplied as a kit.

What it monitors

The stack flue sensor sits in the exhaust path and reads the temperature of the gas leaving the heat exchanger. The control board uses that reading as a safety input. If the sensor drifts, opens or shorts, the heater stops trusting the reading and shuts the burner down rather than running blind.

When to replace it

A heater that locks out on a stack or flue sensor fault, or that will not complete an ignition sequence, is the usual reason this part gets ordered. Check the fault code in the ETi400 manual before you buy, because other sensors on the heater can produce a similar lockout.

Specifications
Brand Pentair
Manufacturer part number 475601
UPC 788379878115
Type Stack flue sensor replacement kit
Fits Pentair ETi400 pool heater
Shipping weight 0.1 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What does the stack flue sensor do?
It measures the temperature of the exhaust gas leaving the heat exchanger. The heater uses that reading as a safety check, and it will shut down or refuse to start if the sensor reports a fault.
Which heater is this for?
The Pentair ETi400. Pentair part number 475601.
Is this a kit or just the sensor?
It is supplied as a replacement kit, so the sensor arrives ready to install in place of the original.
My ETi400 will not fire and shows a sensor fault. Is this the part?
A stack flue sensor fault points here. Confirm the fault code against the heater manual first, since other sensors can produce similar lockouts.
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