Question about Pentair Mastertemp 460733 250k Btu Propane Pool Heater

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Error code eo5 - Pentair Mastertemp 460733 250k Btu Propane Pool Heater

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Yes that is correct, a few other things that will give the code, low gas pressure, not letting enough of a fire to get the exhaust hot,
or rodent debris in the combustion chamber,
ITs easy to try a new sensor first, we sell parts also, Alpha Pool Service, find us on facebook

Posted on Nov 19, 2014

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It's not always the stack flue sensor. But if the heater fires and runs for a few seconds before shutting down then it is the stack flue sensor. You can find the part you need at poolsupply1.com

Posted on Nov 19, 2014

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Stack flue sensor

Posted on Apr 21, 2014

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1 Answer

What does heater code "EO5" mean?


stack flue sensor error its an easy fix try the sensor first what this does is monitor the exhaust temp if it get above 475 it shuts down if it does not get above 25 it shuts down, the sensor is usualy bad but blockage in the combustion chamber will affect exhaust temp

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Error code EO5


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1 Answer

Sta rite 400na gives error code 05 after about 30 seconds


I am not sure if you have received an answer to the issue, or not, but just in case! An EO5 error code is an open stack flue sensor, or switch, There are two forms of the stack flue sensor, so you will need to know which one you have on the heater.

What this error code means is that the sensor "read" the flue temp to be over 500 degrees. Usually, it is just gone bad and reading the wrong temp.

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