Pump keeps running after it hits 50


  #1  
Old 03-15-18, 03:26 PM
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Pump keeps running after it hits 50

I bought a new pressure gauge and 30/50 contact box but the pump keeps running when it hits 50. I can pull the contacts back and it will stay off till it drops to 30. I have an A.O. Smith 1hp. I did find a fried frog in the pump but doesn't look like any damage was done.
 
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Old 03-15-18, 03:51 PM
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Maybe your Pump can only achieve a PSI of 49Ĺ . . . . have you ever seen it go over 50 PSI

If you've tried everything else, I'd adjust the Cut-Out point down to 48, and then you'll know that's all you can get out of this Pump.
 
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Old 03-15-18, 04:11 PM
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Yes I have seen the pressure go to about 52. It had a 30-50 switch on it
 
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Old 03-15-18, 04:22 PM
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You need to check the line that connects the pressure switch to the system.
Usually it's a stub of 1/8" pipe and it gets rusted closed.
 
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Old 03-15-18, 04:31 PM
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My line is a black plastic tube and when I changed the pressure switch water was streaming out.
 
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Old 03-15-18, 04:42 PM
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The black line is to the switch. The gauge also has water streaming from it when taken off.
 
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Old 03-15-18, 04:45 PM
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Then the issue lies with your pressure switch. It may not be set exactly to 50psi.
It may be a few psi over.
 
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Old 03-15-18, 04:51 PM
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I was just tightening the gauge cause I saw a slow drip and the pump just came back on with the pressure at 50. Right now it is bouncing between 50 &51
 
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Old 03-15-18, 04:56 PM
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And when I try to pull the contacts the close right back up
 
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Old 03-15-18, 05:04 PM
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Adjusting the nut to lower the shut off point seemed to have worked. Thanks guys beer and wings on me
 
 

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