Results 1 to 6 of 6
  1. #1
    Join Date
    Dec 2004
    Location
    Indiana
    Posts
    11
    My hot water recirculator has stopped working. The Grundfoss pump is still pumping however there is no circulation?

  2. #2
    Join Date
    Feb 2005
    Posts
    655

    grundfoss

    How do you know pump is pumping?

  3. #3
    Join Date
    Dec 2004
    Location
    Indiana
    Posts
    11
    I have a rotation tester that I got from The Grundfoss distributor. You hold it up to the end of the motor and it shows you which way the pump is turning and how fast.

  4. #4
    Join Date
    Feb 2005
    Posts
    655
    If you know pump is working than I would suspect recirc line should be purged. suspect air pocket, this would stop circulation totally. Or impella problem.

  5. #5
    Join Date
    Mar 2003
    Posts
    8
    Wallynut said exactly what I was thinking. There's probably an air pocket in the line.

  6. #6
    Join Date
    Dec 2004
    Location
    Indiana
    Posts
    11
    What about the check valve?

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