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Binding pump, causing Dead spot in motor?

Recently I was trouble shooting a water heater burner that was repeatedly locking out.
While testing the start windings in the burner motor, I noticed that the blower was harder to turn, when the ohms increased.
I removed the motor and found that pump gears were binding, which I believe resulted in the dead spots in the motor. So I replaced both the pump and the motor.
My boss on the other hand informed me that in all his years he has never heard of that happening, that the pump either works or it doesn't. Suggesting, that I am just a parts changer.
I have seen this before, I think!?!? Or, am I going crazy?


  • Steamhead
    Steamhead Member Posts: 16,736
    Anything's possible

    the bottom line is you got it going. But if that pump was binding I'd be interested to know why. Was there a filter on the line feeding the pump? If it was plugged, the pump might have run dry and overheated. If there was no filter it's possible enough dirt might have entered to make it bind.

    A binding pump and a bad thermal overload on the motor could burn out a winding.

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  • Floyd
    Floyd Member Posts: 429
    Have had that happen...

    when the people run it out of fuel a bunch of times and they just keep on pressing the reset button.
    Screws up the pump real fast... and yes then the motor goes.....

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