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Armstrong Astro 230CI water pump loud

got2blevgot2blev Member Posts: 2
One of my Armstrong Astro water pumps is suddenly making a loud noise compared to the other 5 pumps what can I do to fix that issue? See attached pictures


  • hot_rodhot_rod Member Posts: 13,318
    Carefully loosen that large screw and see if any air vents out. Air trapped in the circulator is one common noise.

    If it is more of a squeal, could be the bearing is fried, the motor will need to be replaced. Is it circulating the water ok?

    If a large pocket of air traps it will stop flowing and often the motor gets very hot to the touch. This condition is when the bearings can be compromised.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
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