Heater shutting down. error message E05 - Sta Rite Sr333na Max E Therm Pool & Spa Heater Dual Electronic Ignition Lo Nox 333,000 Btu Natural Gas

SOURCE: error code EO5

I am assuming that the manufature is Master Temp by Pentair. Is this correct? If so, the manual for it can be found here:
http://www.staritepool.com/pdfs/MasterTempOM.pdf

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.

SOURCE: getting a E05 code on my Mastertemp pentair

I have same problem. Mechanic not sure what to do. May need a new board.

SOURCE: I have a e05 error

check the sensor that is on the exaust

John Prohaska

• 1378 Answers
• Posted on Feb 28, 2011

SOURCE: Runs for awhile, then heater shuts off - have an

Thank you for posting your question here on Fixya.com.

Error code E05 can be caused by many failures in several places. The owner's manual has a decent flow chart in it to help diagnose where the trouble lies. You will find it on page 43 here...

http://www.pentairpool.com/pdfs/MasterTempOM.pdf

Identifying problems with an electronically controlled pool heater is not a job for most homeowners without training and/or experience with this type of equipment. If you are unsure how to proceed no amount of tips from a site like this will replace experience. You may want to consider hiring a professional to look at your heater.

If you decide to pursue the repairs and need additional support please post as specific a question as you can as a comment to this reply.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. You may also contact me thru our website at www.arrowpools.net. Positive feedback is appreciated once your problem is solved!