Keep blowing pump motors pool guy says call electrician

Since both pumps are pulling significantly higher amperage than expected, it would point to a problem with the voltage.

If only one pump was pulling high amperage, then the pump would be a more likely problem.

In any case, the voltage measurement under load is the next step to diagnose the problem.
 
WhisperFlo 1.65 hp = 1,650 watts at 230 volts and about 7.2 amps.
AquaRite = about 200 watts at 230 volts and 0.9 amps.
Polaris Booster = 1,125 watts at 230 volts and 5.4 amps.
UPDATE: new electrical subpanel installed, refurbished pump motor pulling 12.4 amps so it’s SHOT.
7.2 + 5.4 = 12.6 amps, which is pretty close to 12.4.

Is there any chance that you accidentally measured the amperage of both pumps at once?

Where exactly did you measure the current?

Was the Polaris Booster on when you measured the pool pump amperage?
 
Are all pumps overheating? Or just one? If the latter, has it been recently repaired or replaced with a rebuilt unit? If a wrong-valued run capacitor has been installed, it can cause overheating. Otoh if talking about multiple motors, that seems unlikely.
 
Amperage was measured at out wire of timer. Main pump and booster pump on separate timers so amperage was measured independently. The booster was off when main measured, main has to be on for booster to run but since separate timers hopefully no bleed.

@generessler only the main pump overheating.
 
  • Like
Reactions: JamesW
Booster pump re wired & tested this pump is rarely used and also has never overheated. Voltage tested fine and slight drop in amps but nothing significant. I tested voltage at booster with only main pump running it appropriately stated zero.
 

Attachments

  • IMG_0828.jpeg
    IMG_0828.jpeg
    770.8 KB · Views: 4
  • IMG_0829.jpeg
    IMG_0829.jpeg
    354 KB · Views: 4
  • IMG_0830.jpeg
    IMG_0830.jpeg
    383.1 KB · Views: 4
James since the main pump has to run when booster is on and if main pump is pushing too much water thru due to diffuser etc, isn’t it possible booster has to work hard since water is at higher volume? Seems like everything goes back to that “new” main pump.
 
What was the voltage at the main pump with the pump on?

If it was good, I would take apart the pump to check the impeller number stamped on the impeller and to see if the impeller is rubbing on the seal plate.

The Polaris Booster can overamp if there is not enough back pressure.

You can install the red or blue restrictor disc in the wall fitting.

1732214298453.png
 
Yes I have nothing hooked up at wall of booster pump right now so that is likely the problem we are measuring. When I run it I’m driving my 280 around.
 

Enjoying this content?

Support TFP with a donation.

Give Support
Voltage 242 at main pump
If that is under load, the next thing is to disassemble the pump to see what's what.

Maybe the wrong impeller or maybe the impeller is binding for some reason.

Sometimes the seal plate grommets fail and the motor pulls back, which causes the impeller to rub on the seal plate.
Yes I have nothing hooked up at wall of booster pump right now so that is likely the problem we are measuring. When I run it I’m driving my 280 around.
Ok, that explains the high amps on the Booster.

The Booster is designed to operate with a lot of backpressure and it will overamp at low backpressure.

I would install the red or blue disc in the wall fitting.
 
  • Like
Reactions: wireform
“New” pump brought by pool guy. Different motor. Still runs hot at 9.5 amps. I shut it down before more equipment gets ruined and asked which impeller is in rebuild will report more tomorrow
 

Attachments

  • IMG_0865.jpeg
    IMG_0865.jpeg
    431.4 KB · Views: 4
UPDATE: new electrical subpanel installed, refurbished pump motor pulling 12.4 amps so it’s SHOT.
Different motor. Still runs hot at 9.5 amps.
9.5 is better than 12.4, but still too high.

9.5 lines up with a 073129 impeller.

Impeller......Total HP......Amps at 230 volts.

073126.........0.95................4.13
073127.........1.25................5.43
073128.........1.65................7.2
073129.........2.20................9.56
073130.........2.60................11.3
073131.........3.45................15.0

It seems like the pool person is not really able to figure out the issue?
 
9.5 is better than 12.4, but still too high.

9.5 lines up with a 073129 impeller.

Impeller......Total HP......Amps at 230 volts.

073126.........0.95................4.13
073127.........1.25................5.43
073128.........1.65................7.2
073129.........2.20................9.56
073130.........2.60................11.3
073131.........3.45................15.0

It seems like the pool person is not really able to figure out the issue?
Right he rebuilds these pumps for years and years & has good reputation. That said I am a first for him. He swears it is a 072128 impeller. My original off brand pump went out after working fine for several years (sure wish I used my meter when that pump worked). I opted for a rebuilt pump since I’m not trying to automate and I want to stick with whisperflo fittings. Since the off brand pump went out I have changed out the dual timers with frost protection and upgraded the electric service. Tomorrow I am going to check my diverter guts. If that isn’t operating properly it could be placing a strain on the intake to the pump. I have NOTICED both of the renewed pumps are putting more pressure thru my returns than ever. To me this points to the wrong iimpeller. I am running out of ideas and pool guy stumped.
 
Open the pump and look at the impeller yourself.

I am pretty sure that you can do it.

Watch the videos that I posted to see what to do.

Note, do not remove the 4 inner bolts that hold the motor to the seal plate.

Just remove the outer bolts.

Take pictures of everything so that we can see what's what.
 
I remember last spring the multiport on my filter got replaced. They did a bunch of fitting changes and I think most of my system is 2”. If multiport used to be 2” and got reduced to 1.5” would that increase the pressure? I’m getting dangerous! My filter pressure hasn’t really changed runs around 20ish
 
In my opinion, you need to open the pump and look at the impeller to see what the part number is.

Either do it yourself or get someone who can.

Have your pool service open it while you watch so you can see the impeller yourself.
 

Enjoying this content?

Support TFP with a donation.

Give Support
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.