Question about Pentair Minimax NT Heater

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Water is leaking out of the far right burner tube, while pool pump is running.

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Dale Cobb

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Sounds like you either have a pinhole in your heat exchanger or possibly a bad tube washer (seal). A pinhole can result from poor water chemistry or chemical exposure such as pH chronically low or a chemical feeder (chlorinator or salt cell) installed near the heater without a chemical resistant check valve. You will have to dismantle the heater far enough to access the heat exchanger and inspect it while the pump is running. If it's a pinhole in the exchanger, you will need a new exchanger. If its a seal, you will just need a new set of seals (washers) for the exchanger manifold.

Posted on Sep 24, 2009

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