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Pump or Motor: To Replace or Not to Replace… That Is the Question

Pool Pump or Motor

If you’re reading this then there is a good chance that your pool pump is down, the anxiety is up and the algae monster is ready to pounce on your pool. After years in the pool industry, I can tell you many a homeowner has contacted us in a panic with a dead pump. The scenario usually goes as such: they or their tech has the pump apart and they are pondering the options that lay before them. They may know what they need but want to know if it’s worth the work to get the pump up and running. One of their major questions is, “Is it worth it to get a whole new pump or should I just get a motor?” The cost between a simple motor replacement and a pump installation can be sizeable. That difference in price makes it important for you and your wallet to know when to call it quits on an old pump.

Wreck-it or Recover it?

Our first step will be to determine the overall health of your pump. Over the years, this rugged piece of machinery has been subjected to blazing heat, driving rain and even lightning strikes. These conditions can drag down their overall health. The pump’s internal parts, as well as the housing and motor, can go bad and require replacement. When determining the magic number of replacement parts cost versus the cost of the whole pump, we generally suggest 60-75% as the standard. If the cost to repair is within or over this range, it is smarter to replace the pump. This way you have a brand new pump and warranty covering any mishaps down the line. There are a few other things to look out for when checking pump health.  The key points are listed below.

  • Dry Rotted or Cracked Housing – Besides a motor, the housing is the most expensive part of a pump to replace.  If your housing is showing signs of deterioration, take a close look at the other parts of the pump. For example, the pump lid, basket, and impeller could be in need of repair as well. When totaling up the necessary replacement parts, keep in mind the magic number of 60-75%. If you get to that range, it could be time to replace the whole thing.
  • Pumps older than 12-15 years – If it was a car you would have gotten rid of it by now. Sadly, unlike some vehicles, pumps do not appreciate in value as they get older. Pumps approaching this age see frequent breakdowns and repair. The cost of maintenance soon starts to outweigh the value of the old pump.
  • Obsolete Parts – Some pumps for whatever reason are discontinued by their manufacturer. At that time, essential parts can be increasingly hard to find or unavailable. Review our pool parts section for your unit’s parts breakdown to determine their availability.
  • Bronze or Cast Iron Pumps – Metal pumps were the standard for pools decades ago but they have been phased out. High strength composite materials have taken their place in the sun. The metal pump obsolescence has made parts hard to come by. If you are able to find the part, it will be at a premium.

Motors: Listen and Learn

If your pump’s wet end does not have any of the above red flags, a motor maybe your best option. First on the list when determining the status of your motor is to just be quiet and listen.   The sound that follows a flick of the power switch can lend a big clue to what motor issues lie ahead. Motors, for the most part, are simple beasts. Once installed a motor needs little if any maintenance to keep it running. If a properly running motor starts to make any of the following noises, a replacement motor could be your next purchase.

  • Loud Screech or Grinding  – If your pump sounds less like an electrical motor and more like a Boeing Jet then your bearings are bad. Besides the age of the motor, these bearings can rust or freeze from the water inside the casing. The most common causes are a leaky shaft seal, flooding or even errant sprinkler spray. Bearings are the joints that spin the shaft freely or in this case cause you severe ear pain. The good thing is bearings can be replaced on the cheap. If you’re looking to go this route, then view our selection of pool motor bearings. If you do go this route keep in mind you will need a specialized tool called a bearing puller to remove the bearings.
  • Humming Sound – Hmmm, what’s the cause? It’s the capacitor! This little barrel of fun stores an electrical charge to be dispersed to either kick start or keep your motor running. There are two types of capacitors, run (silver) and start (brown.) A blown capacitor is caused by a surge in power or overheating and is an easy fix for a handy homeowner. For the guide on replacing a capacitor, see our guide.
  • Pop and a Click – Once your motor is tripping the breaker, it is on its last legs. When a motor is flipping the breaker, it is a sign of a deeper electrical issue.
  • Silence  – First check your power source. If that is fine then no, your pump is not resting. It’s dead. The silence is a sign that the inner workings of the motor have completely failed, i.e. the shaft has frozen. A motor that has reached this point is beyond repair.

Inspect your Gadgets

Legislators in pool heavy states like Arizona, California, Florida, and Texas have recently put strict regulations on replacement motors and pumps. The new regulations may require homeowners to upgrade their pump to dual or variable speed. The changeover to dual and variable speed pumps is meant to lessen the load on the electrical grid. The effect is also seen in the customer’s pocketbook. Dual speed and variable speed are designed to use less electricity thereby lowering your power bills. To help aid the transition, power companies are providing customer rebates when homeowners install new, qualifying motors. Check with your power company for the specific rebate details.

If you want more information on how these motors can save you money, read the following guides: How to Save Money Using a Variable Speed Motor or How to Replace a Single Speed Motor with a 2Green Motor

author avatar
Matthew Simmons Technical Writer & Pool Product Expert
Swimming pool expert at InyoPools and host of Poolside Chat, brings over a decade of experience in the pool industry.

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63 responses to “Pump or Motor: To Replace or Not to Replace… That Is the Question”

  1. Olga Morozova Avatar

    Since deciding to build a pool my husband and I have fretted about learning all the tricks to maintenance. I’m still learning all about pumps and motors and am worried that I’ll miss something and end up paying for a repair that I could have avoided. Do you have a checklist or any tips to make sure that you do the right things to avoid needing repairs?

    1. Matthew Simmons Avatar

      Hello Olga, eventually any pool equipment will need repair so we can not prevent that. But we do have a 128-page Ultimate Pool Care guide we email you once you sign up for our newsletter. Visit http://www.InyoPools.com and enter your email in the newsletter pop-up. The Ultimate Pool Care guide should cover any and everything you need or you can review our How-to guide section if you need further help.

  2. Em J Avatar

    My husband and I are getting a pool installed in our yard. We are really excited and we want to know how we can best care for our pool. One of the most common things we have herd people stress about is their pool pumps. It is good to know that after about 12 years a pump should probably be replaced. We will have to keep that in mind!

  3. Callie Marie Avatar

    My grandma has an old well that hasn’t worked in a while, so we decided to take a look at the pump. It is pretty beat up, so my grandma will either have to get it repaired or replaced. The housing still looks okay, and it isn’t making any strange sounds, so maybe it can still be fixed!

    1. Matthew Simmons Avatar

      Fingers crossed! Let us know how it turns out.

  4. Gus Chiggins Avatar

    I think that inspecting the housing is a good idea. My friend recently replaced his electric pump. I helped him mount it into the floor. Also, we put in a new power supply for it. What kind of pumps are your favorites?

    1. Matthew Simmons Avatar

      My favorite pumps are the simple and familiar ones like the Hayward Super Pump or the Pentair Whisperflo. I prefer these pumps for two reasons: they have been used on pools for decades, their design is tried and true and unlikely to show any design quirks like the Hayward Northstar(do not even get me started on that pump.) And secondly, these two pumps are super popular, so finding parts online or locally is easy for a pool owner needing a quick fix.

      But my favorite pump overall is the Pentair IntelliFlo VF because of its durability and ability to keep a constant flow. The VF model is unique to the other IntelliFlos and Variable Speed pump models because the user inputs the GPM they desire rather than RPMs. The pump self-adjusts its RPMs to reach the flow instead of using RPMs that takes a “dial it in” approach with any new installation. As a pool’s filter becomes dirty the flow of water begins to slow decreasing a normal pump’s GPM but the VF will sense the slowing flow rate and raise its RPM level to maintain your desired RPMs.

      1. Mario Avatar

        Mathew I read an older response (Sep 32 2015) from you that your favorite pump and motor is the Pentair Intelliflow VF. I currently have Pentair WhisperFlo that is more than 20 years old and a replacement 2 HP motor that is about 5 years Old. I had a water leak on the dry side and the motor is showing water damage. I rebuilt the motor following a seal failure and noticed that at least one motor mounting screws hole on the bottom of the pump broke off. They are working now but I know I will need to replace both sooner rather than later. The Intelliflow VF is a bit too much money and may be overkill for me. Should I replace the pump and motor with the WhisperFlow or bite the bullet on the more expensive Intelliflo VF recommended?

        1. Matthew Simmons Avatar

          If the VF is too pricey, I would stick with the WhisperFlo, but maybe consider a dual-speed instead of a single. Going dual speed is a little more money than the single, but it will save you money in the long run. Also, just because I prefer the VF, that doesn’t mean the VS (011018) should be overlooked. It is the same housing and motor combo just with a less fancy control/timer. Just for future reference, Pentair are removing some products from online retailers, making them brick and mortar store exclusives; our site may show them as NLA, but they are still available.

          If you want to steer away from Pentair, we are growing fond of the Waterway Defender VS, it has similar flow rates to the WhisperFlo.

  5. Delores Lyon Avatar

    Thanks for sharing this advice on when to repair or replace pumps and motors. I had no idea that a pump older than 12 years old would be considered something that needs to be replaced! If that’s the case, then my pool really needs to get a new one soon. If I’m remembering correctly, the pump in there should be about 20 years old!

  6. Zach Thalman Avatar

    Thanks for the tips. I think my pump is pushing around 15 years and really needs to be replaced. I have noticed a few problems that it has started to have as the years have gone on. I really hope we can get them fixed before there are any real problems.

  7. Caleb Hart Avatar

    I know very little to nothing about this kind of thing. I’m sure that it’s not that complicated if you are a professional and do it all the time. Maybe I should get one of those professionals to come and take a look at my pump. I wouldn’t know how to fix it if it was broken.

  8. Rhys Rawson Avatar

    Thanks for the information on what different sounds made when my motor is turned on mean for my motor’s health. Mine typically makes a humming sound when I turn it on. I’ll be sure to replace the capacitor, like you suggested.

    1. Matthew Simmons Avatar

      Great, let us know how it works out for you.

  9. Skylar Mitchell Avatar

    I would really like to look into getting a new pump for my pool, or at least get the one repaired that I have right now. After reading more about repairing pumps, it sounds like my pump may be past the point of saving. It is incredibly old, probably about twelve years old by now, so it is probably just getting really worn out. I think it would be good to look at new pumps to try to find one that is more efficient and that will last a long time as well!

    1. Matthew Simmons Avatar

      Skylar, thank for the post. if you are looking for a pump replacement then there is no better place than Inyo’s Pump Section. If you have questions about anything you see, do not hestiate to email or call our techs at 877-372-6038

      1. Terry Avatar

        My hot tub woke me up in the middle of the night sounding like static from the tv. And no water movement. Would that be the motor or just the wet end needing replaced.

        1. Matthew Simmons Avatar

          Terry – unfortunately, I cannot tell you what it is just by the description of the sound. When it comes to troubleshooting a pool/spa pump, you need to open it up to check for damaged parts or get hands-on to check the motor.

    2. Richard Avatar

      Both of my pool pumps are over 12 years old.
      AO Smith motors with Pentair whisperflow pumps.
      Recently and at different times, they both began to leak water. I pulled both motors inspected and cleaned everything. I then replaced the seal plate gasket, diffuser o-ring and shaft seal. Pretty much every seal.
      I Cleaned up the bolts and carefully re-installed everything.
      Total cost of new parts for both pumps $34.
      All in all, it took me about 2 hours labor primarily because one of my pumps is precariously located under pipes, etc.
      No leaks and I’m sure they’ll give me several more years of service.

      1. Matthew Simmons Avatar
  10. Douglas Brown Avatar

    Most of the time I would much rather recover it, rather than wreck, but I do understand that recovering it is a cheaper process. As far as my engine goes, I think it still has enough life in it to warrant a recover rather than a wreck. I would say that there are at least a few of the example problems you listed here, especially the grinding noise. It is quite unpleasant, and I want to fix this as soon as possible.

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