Question about Pentair MasterTemp High Performance Gas Heater 250 BTU Propane ()

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I have a Pentair Mastertemp 250 pool heater. Installed three years ago and there have not been any problems. About 3 months ago it started igniting on its own and heating the pool. I turned heat o

The order of the read out on the display screen is "Ad0, SF1, 888, R=8"

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If not on controller or on maintain heat bad control board

Posted on Oct 07, 2017

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SOURCE: I have a Pentair Mastertemp 250 pool heater with

This is an ignition flame falure code. Could be you don't have gas getting to the pilot, no spark to ignite the pilot or your ignition is not reading the flame. Sorry to say but it's probally time to get the pool guy out to look at it. Good luck.

Posted on Apr 15, 2010

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SOURCE: pentair pool heater has error

When I look at a Pentair manual that may or may not be the same model as yours it says in the Setup section that on power up "888" is displayed and then "---" is displayed. I assume this is to test all the segments of the display.

If you are seeing this symptom some other time than when powering up then there is probably something wrong with the power being supplied to you heater of something in the heater causing it to think it is powering up.

Please let me know is this answers the question. Thank you.

Posted on Sep 03, 2011

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SOURCE: I have a mastertemp pentair

Since I don't know exactly what model you have I can only suggest you call the Pentair technical support at 800-693-0971 andthey should be able to help you figure this issue out.

I hope this helps.

Posted on Sep 14, 2011

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Pentair mastertemp 250 NA. heater will not fire, no error codes. starts fine, gas flows, igniter heating but still will not fire. It has a new valve, gas pressure entering valve from new regulator is 8.35...


All appearances - No fuel to ignite!
evrything else looks good, proper gas pressure, proper volts at igniter, etc - it should ignite! If fuel present, heater should Fire!
make sure all valves are open.
Gas valve is ON
AND purge any air from gas line.
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Since I don't know exactly what model you have I can only suggest you call the Pentair technical support at 800-693-0971 andthey should be able to help you figure this issue out.

I hope this helps.

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These codes indicate that you have a bad temperature sensor. Once replaced, the error codes will go away.
This is an easy do it your self project, or it may still be under warranty. Check with your install date; if you have installed the heater 1 year or less (single piece of Pentair Equipment) or if you recently built the pool and installed 3 seperate pieces of Pentair Equipment, your warranty is extended to coverage for three years.

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This is an ignition flame falure code. Could be you don't have gas getting to the pilot, no spark to ignite the pilot or your ignition is not reading the flame. Sorry to say but it's probally time to get the pool guy out to look at it. Good luck.

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