Navien Flow Sensor Repair and Fix

    This problem typically starts with an ERROR 001, ERROR 038, or ERROR 039, but your Navien could show a number of other errors caused by the faulty flow sensor. We will discuss further below.

    First thing, if you need hot water immediately, try unplugging the system wait 30 seconds, plug it back in.  This resets your tankless and may give you hot water again for a quick shower or temporary use.  Don’t forget though, this type of error typically will reappear again shortly.

    Disclaimer

    We recommend you call a certified technician to replace your flow sensor, you are liable for any damage you cause to yourself, your tankless, and it could void your Navien warranty. That being said we understand that homeowners are squeezed in every which way for every penny they have, this is a fairly easy replacement job and the parts are cheap as well.

    Replacement Navien Flow Sensor

    1. NPE/S model tankless – Part # 30011534A (out of stock)
    2. NPE/A model tankless – Part # 30008571A
    3. All other models*  – Part # 30010537A

    If parts are unavailable above they may be available through The USA Amazon which always has a far better selection of parts.

    1. NPE/S model tankless – Part # 30011534A
    2. NPE/A model tankless – Part # 30008571A
    3. All other models* Part # 30010537A

    *Replaces BH1406004F, 30002669A, 30004802C

    CC
    CC180
    CC-180
    CC-210
    CC210
    CC-240
    CC240

    NP
    NP180
    NP240
    NP240A
    NP-240
    NP-240A

    CR
    CR180
    CR-180
    CR180A
    CR-180A
    CR210
    CR-210
    CR210A
    CR-210A
    CR240
    CR240A
    CR-240
    CR-240A

    NR
    NR180
    NR-180
    NR180A
    NR-180A
    NR210
    NR-210
    NR210A
    NR-210A
    NR240
    NR240A
    NR-240
    NR-240A

    How To Replace The Flow Sensor

    Navien Flow Sensor Replacement Video

    Additional Notes


    There are a few things to mention here.

    1. Sometimes the flow sensor just needs to be cleaned up and reinstalled to correct the error. If you have heavy scale and calcium in your water a good cleaning may be all that is necessary.
    2. Occasionally something like an error 012 will display indicating a flame loss, this could be indirectly caused by the flow sensor. If your flow sensor is working intermittently the tankless could read no water flow cut the flame but then get flow from the flow sensor again. This situation could theoretically then throw a flame loss error.
    3. Clean the water inlet filter/s. If these get clogged or gummed up water flow will slow to a trickle and you might get a false negative flow sensor error.

    Author: administrator

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    2 Comments

    1. Some additional information on cleaning the flow sensor on my NR-210A- once you remove it to clean it, there is a spinning impeller wheel inside. Mine was corroded to the point that it couldn’t spin. No signal was being transmitted so the heater thought there was no flow.

      Once I cleaned it with a pipe cleaner and blew into it I heard that magic spinning sound. I have ordered a new flow sensor but for now I have hot water again!

    2. Abril 9 del 2020.

      Tengo 2 Navien model NPE- 240A.
      He tenido problemas para que los tecnicos lo arreglen. por lo cual me gustaria que me recomendaran tecnicos calificados. la compania que me arregla los problemas de los NAVIEN es ALLGOOD. hoy 9 de abril del 2020, unos de los Navien mandan el Error # 439, a las 11:00:00 remplazaron la parte # 30008245A Nombre WATER ADJUST VALVE NPEA. me combraron $ 550 dolres, les pague y fui a mirar el NAVIEn y continuava con el mismo Error 439, Lo checaron nuevamente y me indicaron que ya estaba listo. fui a checarlo y estaba el mismo Error 439, regresaron para resolver el problema y me dijero que se iba a reparar solo ya que lo habian reseteado. pero paso el tiempo y no se arreglo el problema. el tecnico ya se retiro. me cobro los $ 550 dolares. y el NAVIEN 240a Sigue mal. por favor necesito un TECNICO CALIFICADO. LOS TECNICO QUE TIENEN LA COMPANIA ALLGOOOOD. NO SABEN REPARLOS. PERO SI SABEN COBRAR.

      mi numero Celular es 770 841-8218

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