Grundfos JQ1 Pump Question

Discussion in 'Pumps and Tanks Well Forum & Blog' started by grassyhut, Jan 13, 2013.

  1. grassyhut

    grassyhut New Member

    Jan 13, 2013
    Hi, I have a Grundfos JQ1 pump that according to the suppliers needs a new pressure switch (Transducer).
    The pump won't start and gives 6 flashes on the red led on the control panel. I have also been told that the switch is no longer available.
    Does anyone know of any old stock. Alternatively, can this pump be modified to run continuously and use and external sensor.
    I have a reasonable knowledge of electronics so any info such as a circuit diagram or service manual would be much appreciated.
  2. valveman

    valveman Moderator Staff Member

    Mar 15, 2006
    Pump Controls Technician
    Lubbock, Texas
    Sorry but I cannot find any info on a JQ1. Apparently like all variable speed pumps it was designed to make the most money for the manufacturer, not to last.
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  4. zl700

    zl700 DIY Senior Member

    Aug 26, 2009
    Western NY
    I remember that pump has to be 15 years old. I used it on my cottage before I drilled a well. It was later replaced ** the JQ2&4 but those operated differently.
    12-16 years of service, time for a new one anyways.
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