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Thread: Pump running hot, cutting out

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    Pump running hot, cutting out

    I have a pump that may (or may not) be on its last legs. I need to get it fixed, but can't afford to pay my pool guy a ton of dough. (Right now, I'm contemplating his $480 estimate to replace about 3 linear feet of tile that came loose over the winter )

    I have a Hayward SP3000D Superpump that is driven by an A.O. Smith UST1102 1 hp pump. When I started up the pool a couple weeks ago, the pump did not sound happy. It was louder than normal, and kinda scratchy sounding. After a day or so it settled down and went back to smooth, quiet operation.

    At midday today, I noticed that the pump wasn't running. I checked the breakers, timer, etc, and everything was fine. I cycled the breakers, GFI, timer, off on switch--nothing. I was able to spin the impeller easily (breakers off, of course). No joy. About an hour later, the pump came on by itself! It ran for an hour or so, then quit. Hmmm. The pump always runs hot, and it did this same thing once last year (but never again). So I hit the pump with some water from a hose, and after cooling the pump housing for about 45 seconds, it came back on and stayed on for the rest of the day.

    So I'm thinking the pump is overheating (it was 91ยบ here today, and the pump gets direct sun). I'm wondering if the thermal switch is bad (although it does seem to work), or if the pump is wearing out and running hotter than normal (it is 7 years old).

    Regardless of what's wrong, it doesn't seem too hard to fix myself--even if I have to replace the pump. I could get a new pump (same model) for around $165.

    What do you think I should do?

  2. Back To Top    #2

    Join Date
    Mar 2007
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    Coastalish 'down easter'
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    Re: Pump running hot, cutting out

    Welcome to TFP!!

    I'm not very 'mechanically savvy' but to replace the motor is a cakewalk! Spishex may know which part is bad and how to replace it and therefore save the existing motor, but I can tell you, to the smallest detail, how to replace a superpump motor (and shaft seal -SP 1600 Z 2 , which needs to be done whenever you changeout a motor 8) ).

    I hope Tim (Spishex) has a cheaper fix (or someone else), but if you want to swap out the motor, let me know and I'll tell you EXACTLY what you need to do and how to do it
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  3. Back To Top    #3

    Re: Pump running hot, cutting out

    Cool. I generally do stuff like this around the house all the time, and was going to forge ahead anyway, but having step-by-step instructions would be outstanding. Thanks for the offer.

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    budster's Avatar
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    Dec 2008
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    Savannah Historic District
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    272

    Re: Pump running hot, cutting out

    You couldtake it to a motor repair shop, but even the best only warranty for 90 days or so. A new UST1102 and a new seal should be around $200, and comes with a warranty! That's the easier way.
    http://www.swimmingpool.com/

    "Leave the gun...take the cannolis"

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    spishex's Avatar
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    Oct 2008
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    Hillsborough, NC
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    Re: Pump running hot, cutting out

    I agree with budster. There's something adding resistance to the shaft of the motor. Maybe some old bearings? Repairing it would cost half of what a new motor would run and you're already at the end of it's expected life.

  6. Back To Top    #6

    Join Date
    Mar 2007
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    Coastalish 'down easter'
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    Re: Pump running hot, cutting out



    Have you got the new motor and want the "Waste's How To Do It Guide?" :P 8)
    Luv& Luk
    -Ted

    Having done construction and service for 4 pool companies in 4 states starting in 1988, what I know about pools could fill a couple of books - what I don't know could fill a couple of libraries :-D

    POOL SCHOOL, TF Testkits, Jason's Pool Calculator, CYA vs. cl chart, (Just a few DARNED handy links!)

  7. Back To Top    #7

    Re: Pump running hot, cutting out

    Quote Originally Posted by waste


    Have you got the new motor and want the "Waste's How To Do It Guide?" :P 8)
    I'm actually going to try replacing the thermal switch and see how that goes. Ultimately, I may decided to replace the motor (we are selling this house and I don't want to stick the next guy), and if I do I may bug you for the step-by-step.

    Thanks very much for checking back!

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