A common Capacitor Start Pool Motor has three sets of windings: two sets of main windings which are engaged while the motor is running and a third Capacitor winding that provides extra torque in the motor during its initial startup. This guide shows you how to measure the resistance in these coils to determine if this is the cause of a failed motor. MAKE SURE THE POWER IS OFF before you take these measurements.
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Marcos Posted: 7/25/2022
Good evening. Is it possible to reverse rotation on this motor? If so, can you please draw a diagram on how this is done. Thank you.Reply
InyoPools Product Specialist Matt S. Posted: 7/28/2022
Unless the motor is three phrase, you cannot reverse the rotation.Reply
Dean Posted: 3/15/2021
Thank you for the article--very informative. What does it mean when all of the resistance readings (L2 to A, A to YELLOW, YELLOW to RED, and L2 to RED) are all "OL" (open circuit--no continuity)? I have a Hayward 6060 booster pump that stopped working. The circuit breaker was tripped so I reset it, and it trips immediately (with a loud pop) when the pump is turned on. I'm guessing the motor windings are shot, but I can't figure out why ALL of the readings would show OL. Thanks.Reply
Greg Posted: 5/19/2021
Dean, my motor does the same thing. It rained heavy last night and the pump made a ‘pop’ sound and tripped the breaker. Was your motor dead or was it a wiring issue? I’m thinking the wires shorted or arc’d on mine due to rain.Reply
InyoPools Product Specialist Matt S. Posted: 5/21/2021
Whatever the cause, the circuit is getting wet and becoming compromised which means it should be inspected.Reply
InyoPools Product Specialist Matt S. Posted: 3/16/2021
I would hazard a guess by saying that your motor is just dead, and the wiring and windings are shot. If a motor is that bad off, a post-mortem isn't really necessary, it just needs a replacement.Reply
Max Posted: 11/15/2020
How do you check the windings on a U.S motors 1081 pump ? Cat.EUSQ1102. The capacitor tests good , the motor shaft turns easily and the motor hums and than turns off the breaker? What the problem? . Motor does not smell burnt?Reply
InyoPools Product Specialist Matt S. Posted: 11/16/2020
It would be the same process for checking most 1081 single speed pool pump motors. The designs across the various manufacturers are very similar. Follow the steps in this guide, and you should be successful.Reply
Anonymous Posted: 11/16/2020
I would agree If the voltage switch and wire colors where the same as in your description. On the US motor they are completely different. If you could post with pictures the solution , It would be greatly appreciated .Reply
InyoPools Product Specialist Matt S. Posted: 11/18/2020
Unfortunately, we have never carried US Motors, so a library of their how-tos and schematics is not something I have on hand. You want to reach out to US motors or one of their retailers for guidance on this specific troubleshoot.Reply
raulc Posted: 10/9/2018
The reading: Main winding + start capacitor winding, does it assume the capacitor is good?Reply
Daz Wazlle Posted: 7/22/2019
For the benefit of those reading in the future, the 2 yellow wires are on the same post of the cap. so the cap. isnt in the circuit.Reply
InyoPools Product Specialist Matt S. Posted: 10/10/2018
Hello Raul - presumably you would have checked the capacitor before getting to this point of breaking down the motor to check the windings. But if you haven't, I suggest reviewing this guide: How to Test a Pool Pump CapacitorReply
InyoPools Product Specialist Dennis R. Posted: 11/7/2016
Kerim - The most common electrical problem is a bad capacitor. Check that first is you haven't. Then look at our guide on "How To Replace AO Smith Motor Parts - Overview" for other suggestions. If no luck there, I'd pull the motor out and have a pool or motor store look at it.Reply
Karim Posted: 11/6/2016
I've done all these electrical tests. All are fine, but still my pump doesn't start! It even doesn't hum! What is the issue?Appreciated your help
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Abdul Posted: 10/29/2016
Thank you for the simple guide and it make work so interesting and confident when facing such matters. Appreciate on the guide.Reply
InyoPools Product Specialist Dennis R. Posted: 7/21/2016
Winding Resistance - The red wire to the switch is disconnected during all tests. It just looks like it is connected because it is near the switch terminal.Reply
Anonymous Posted: 7/19/2016
Looks like the red wire was reconnected to its terminal, but I don't see where this happened. Which tests should have this disconnected?Thanks!!
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Steve Posted: 3/8/2016
Great explanationReply