Question about Pentair Minimax NT Heater

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I have the MiniMax NT 300DV. When I push the pool button to turn on heat to pool it immediately snaps off. Readout is OFF. The diagnostic light on the ignition module flashes once when internal power switch is turned off to on. How do I fix an air flow fault? This situation has happened intermittently over the past 2 months, and has always previously corrected itself with time.

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  • aeckels Jun 23, 2009

    Sorry, but I need further info- Clean what orifice, exactly? Where is it and how do I access it?

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Looks like you need to clean the orifice, normally dirt gets in there or spiderwebs that would explain to me why its been coming on and off , best way to clean is to use a pipe cleaner or remove them and clean ok, that should solve your problem, happy swimming

Posted on Jun 23, 2009

  • Brett McGuigan
    Brett McGuigan Jun 23, 2009

    the gas orifice is the jets under the flame sensor, check for for obstructions, usually webs. In fact check them all. If nothing, check flame sensor- clean anything off it, a little sand cloth will work, have you cleaned the filter, make sure theirs nothing stuck in or behind the vents, it can shut off if it cant let out the air flow, check the wiring, are they on tight and clean

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