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  1. RealityCheck

    Navien NPE External Recirculation Confusion

    I recently installed a NPE-180A2. Also was a bit confused with the recirc, and having to set both the physical switch and the software to external for the recirc line. Ours recently started going off during the night as well. I believe this is an 'anti-freeze' feature, so hopefully it is...
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