Question about Pentair 3hp Whisperflo Pool Pump In - Ground

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2 speed pump makes a buzzing sound and will not turn on when called to run. replaced capacitor, same problem.....

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Unfortunately your motor has shorted out and needs to be replaced.

Posted on Sep 28, 2010

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Runs fine on low speed hums on high speed (turns slowly) is it a capacitor problem, internal windings or controller?

Motor itself is the culprit.

Capacitor helps the motor to start spinning from a dead stop, so NO, it is not a capacitor problem.

Probably high speed windings. Means - New Motor needed.

Another possibility, is the controller could be sending power to "Both" sides of the windings: High speed & Low speed at the same time. But normally when this happens, you hear a loud buzz type of sound, motor will spin slowly - if at all.

Good Luck

Mar 11, 2015 | Pool & Spa

1 Answer

Emerson 1081 pool pump makes buzzing noise when i turn it on wont start

Either something blocking the impeller / shaft, from turning or the motor failed.

You can try to manually assist the motor, by removing the small cap at the back of the motor, getting a flat blade screwdriver, and right when you flip the switch (get a helper) turn the shaft clockwise while it buzzes. If it takes off - possible Bad Capacitor? Try a couple times if it doesn't take.

if bad capacitor, make sure you get the exact replacement, or 'Slightly Greater' will work - and I refer to the MFD number. Don't go smaller!

May 29, 2014 | Emerson THREADED SHAFT UP RATED - 1.00 HP...

3 Answers

Pump makes a humming sound but will not run

Don't run it hot or it will stop working.
Sounds like start capacitor has gone bad.
Copy following link for motor troubleshoot resources:
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May 27, 2013 | AO Smith Centurion 1081 2 Hp Standard...

1 Answer

Is it normal for the fuel pump to run when engine is running, It makes a buzzing sound

if the pump runs continuously after the ignition has been turned off, then the pump is malfunctioning. Some after market pumps do make odd sounds, unlike the factory original.

Dec 22, 2012 | 1998 Dodge Avenger

1 Answer

Hi my 3/4 hp 230/115 centurian is buzzing and i smell burnt electrics.....what do i need to order to fix?

If the motor can be turned easily by hand then sometimes the starting or run capacitor can be replaced with the same value device and the pump will run. If a new capacitor is installed and it doesn't run then the motor needs to be replaced. If the motor does not turn easily then usually the bearings are bad and the motor needs to be replaced. I hope this helps. The burned smell is either overheated wiring in the motor or a bad capacitor, etc.

Aug 05, 2011 | AO Smith Pool Pump Motor Hayward Swimming...

1 Answer

My Whisperflo was making a buzzing noise while pumping. I turned it off to clean the strainers and now when I turn it on it makes a loud buzzing noise and the motor does not spin. The impeller moves...

it's a bad start/run capacitor. It's under the hump on top of the motor. DO NOT touch the terminals with your bare hands in case the capacitor is charged. You can replace it with an exact match.

Sep 06, 2010 | Pentair 1.0 Hp Whisperflo Pump

1 Answer

Tv tries to turn but makes a buzzing sound then

If it was the CL030 capacitor which is a gray rectangle .0087uf 2000V capacitor. The deflection board will most likely need the flyback and the HOT replaced as well.

Jan 01, 2010 | GE D52GW12 52" Rear Projection HDTV-Ready...

2 Answers


It is the capacitor but a capacitor usally goes out because the motor is going out. Time for a new motor, You might want to look at replacing the whole pump with an energy effiecent variable speed pump.

Aug 23, 2009 | Hayward 2HP Pool Pump Motor A O Smith...

1 Answer

My 2 speed jandy pool pump is over heating

you may either have a bad start/run capacitor for the high speed side or bad supply voltage feeding the high speed side. If there are no loud bearing noises, it should just be either of those two problems.

Aug 15, 2009 | Jandy PlusHP Pool Pump EE Dual Speed - 2.0...

1 Answer

Kenmore microwave making loud buzzing sound.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Mar 05, 2009 | Kenmore 62622 Microwave Oven

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