Wondering if I have a circulator pump problem

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by tommyo, Oct 11, 2009.

  1. tommyo

    tommyo New Member

    Oct 11, 2009
    How can you tell if a circulator pump is bad, on a gas forced hot water heating system?
  2. nhmaster

    nhmaster Master Plumber

    Jul 30, 2008
    Tech. Instructor
    S. Maine
    Hold onto the pipe directly above it with the thermostat calling and the boiler at temperature. If you say ouch the circulator is working.
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  4. hj

    hj Moderator & Master Plumber Staff Member

    Aug 31, 2004
    Cave Creek, Arizona

    If the pipe is cool when the circulator is off and hot when it is running, then the pump is probably working, but even that is not a good indication tnat it is working PROPERLY.
  5. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Sep 2, 2004
    Retired Systems engineer for defense industry.
    New England
    Most circulator pumps have very little head pressure and won't be able to push water if there's an air pocket somewhere higher up. You'd need to ensure you got all of the air out first.
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