Question about Pentair 3/4hp 115/230v Booster Pump - La01n

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I have a Pentair 3/4HP booster pump LA01N also. It just started making a grinding sound. I do work with industrial pumps and I am trying to fix it. My confusion is it only makes the sound under load. I can run the motor with no impeller and push on the shaft with no noise, I added the impeller and no noise, I added the volute and no noise, I added the suction line and pumpe water no noise, I connected the discharge line and then there is noise. I can blow in the discharge line and no retriction ples no cleaner connected at the time.. Pump is a few years old. I inspected the impeller and finger screen and both are clear. thanks

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  • stevekcodysr
    stevekcodysr Aug 22, 2012

    How do i fix a noisy pentair booster pump?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: Pump works in spa mode, but doesn't work in pool mode. Why?

We need more info. Which control system is it? Suntouch, easytouch, intellitouch.......? It sounds like a programming problem in the controller.

Posted on Jun 26, 2009

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SOURCE: pentair whisperflo pool pump motor replacement

No there is a cover on the other side of the motor thet comes off and with a 9/16 wrench holding the shaft - spin the impeller off

Posted on Jun 28, 2009

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SOURCE: Legend pool cleaner wheels not moving

You might want to pull the drive wheels and see if their might be a small pebel stuck in the drive gears on the wheel.

Posted on Oct 04, 2009

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SOURCE: my pentair whisperflo is making a load squealing

When you have noise in the pump it is usually a rumbel or rattel. If you have a squealing it is probally in your motor and is more than likly a bad bearing. If you have any water leaking at your seal this is probally the problem and it will just get worse. Sorry to say you are very close to a new motor.

Posted on Dec 07, 2009

  • 13 Answers

SOURCE: Hi, My booster pump for my pool is very loud. It

changing the seal is ok but if the shaft has become corroded then you will not get a true seal. the noise is most probably the bearings and replacing them doesn't always help.
best solution is to replace the whole pump which will give you years of use instead of months
Adam
Canadian Spa Company

Posted on Oct 04, 2010

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Hi, My booster pump for my pool is very loud. It is a Pentair model number LA01n. It has gotten louder over a period of about 2-3 months. It has a small leak in the front seal and I had the seal...


YOUR BEST BET IS TO COMPARE MOTOR REPLACEMENT TO AN ENTIRE PUMP REPLACEMENT
MORE THAT LIKELY ITS PROBABLY NOT A GREAT INVESTMENT TO JUST DO A MOTOR ON A BOOSTER PUMP
YOUR MOTOR IS NOISE IS COMING FROM BEARINGS INSIDE THAT ARE GETTING WORSE AND WORSE
NOW A DAYS I STRONGLY DON'T RECOMMEND EVEN TRYING TO REPLACE JUST BEARINGS THEY NEVER LAST LONG AND ITS ALMOST AS COSTLY
HOPE THIS HELPS--CHARLIE -POOL PROS

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