Boiler Pump

Discussion in 'Boiler Forum' started by Ki23, Mar 16, 2021.

  1. Ki23

    Ki23 New Member

    Joined:
    Mar 14, 2019
    Location:
    Rhode Island
    Hello all,
    I had a Lockinvar Knight 085 installed last year and it's been working great. It appears as though my primary pump keeps starting/turning off for no reason. Even when the Tstats are not calling for heat, it makes a banging sound and the pump gets really hot. I have even shut the entire boiler down and the pump still makes the noise. The only way I can get it to stop is to kill the power to boiler/pump and then it obviously stops. I have a video but it won't let me post without a URL.

    Any ideas?
     
  2. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    Model of the boiler a whn 085? There is timer for post running normally set at 60 seconds and it's adjustable also under operational info C shows if pump is calling or not.
     
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  4. Ki23

    Ki23 New Member

    Joined:
    Mar 14, 2019
    Location:
    Rhode Island
    That is the correct model number. I’m not familiar with operational info C. What are you referring to?
     
  5. Paulypfunk

    Paulypfunk In the Trades

    Joined:
    Feb 26, 2010
    Location:
    Seattle
    Possibly an intermittent short in your wiring somewhere. Do you have high voltage and low voltage wiring run in the same conduit? You might be getting ghost signaling.
     
  6. fitter30

    fitter30 Well-Known Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
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