Question about Pentair MINIMAX NT TSI IGNITER

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Pentair minimax nt 250,000 btu propane will startup, run for 30 seconds, service light comes on, heater restarts itself 30 seconds later. Will keep going just like this. Thanks in advance!

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The service manual for your heater can be found here:
http://www.staritepool.com/pdfs/MiniMaxNTServiceManual.pdf

This should help in determining the problem and steps to resolve.

Posted on Aug 22, 2009

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Posted on Jan 02, 2017

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http://www.parts4heating.com/Pool-Heaters-Pentair-MiniMax-NT-400-s/696.htm

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

Check all the burners for nice bright blue flames standing 3-4" off the burners when it lights. If any are heavily orange in color you need to clean out that tube and the jet in front of that tube. If they are mostly blue but short and wispy in nature check inlet and outlet gas pressures at the gas valve to ensure there is adequate gas. Finally, be sure there is adequate air flow into the heater. Not enough combustion air can cause sooting issues as well.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!

John

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I bet that your 15 seconds of flame are more like 7 seconds. The time is very important. If the flame is not recognized after a specific time the valve is shut off. If the flame sensor is GOING bad but still make some rectification then you may get the issue you are having. I would start with the flame sensor and work from there.

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