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Found a really cool tool

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RayWohlfarth
RayWohlfarth Member Posts: 1,516
I was at the supply house and found this little tool which you hold up to the rear of a Grundfoss circulator and it lets you know if its running. I loved it. I bought one for every employee, even the secretary. Not sure if it works on other circs.

Ray Wohlfarth
Boiler Lessons
Harvey Ramer

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  • Gordo
    Gordo Member Posts: 857
    edited November 2017
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    I'm not absolutely sure, but I think all that tool does is to confirm that there is AC current to the circulator stator coils. The rotor can still be locked and that gizmo will still spin.

    I know. I was disappointed too.
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  • Mad Dog_2
    Mad Dog_2 Member Posts: 7,103
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    Yes. Had one years ago. Finally snapped off my keychain. Mad Dog
  • RayWohlfarth
    RayWohlfarth Member Posts: 1,516
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    Gordo Thats depressing It is supposed to tell rotation also but did not. Mad Dog will keep it in my tool bag Have a great Thanksgiving
    Ray Wohlfarth
    Boiler Lessons
  • Guy_Woollard
    Guy_Woollard Member Posts: 5
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    I have had a few of these as well. At least they let you know that the circulator is getting power, at which point you can eliminate the boiler control and/or relay from the troubleshooting. It narrows the issue down to a flow problem.
  • Henry
    Henry Member Posts: 998
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    You can get them FREE from Grundfos
  • JUGHNE
    JUGHNE Member Posts: 11,075
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    They used to have the big plug in the back, you could check that the rotor was wet, crank start a stuck pump with a screwdriver and also feel with your little finger if it was rotating, (very carefully of course, don't try this at home.)
    Zman
  • RayWohlfarth
    RayWohlfarth Member Posts: 1,516
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    Guy it sure beats holding a screwdriver against the circulator
    Ray Wohlfarth
    Boiler Lessons
  • RayWohlfarth
    RayWohlfarth Member Posts: 1,516
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    Thanks Henry
    Jughne I have done that both carefully and not
    Ray Wohlfarth
    Boiler Lessons
  • burnerman_2
    burnerman_2 Member Posts: 297
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    I have a few they give them out at trade shows Taco Too