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Thread: Pentair Challenger Hums...Doesn't run.

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    Pentair Challenger Hums...Doesn't run.

    I have a Pentair Challenger 3/4 hp pump that all of the sudden quit. It is about 8 yrs old and has never had so much as a hiccup. Today I went out and noticed it wasn't running. I checked the breaker and it was thrown. I reset it and the motor just sits there and hums. What is the first thing to check?
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Mod Squad JohnT's Avatar
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    Re: Pentair Challenger Hums...Doesn't run.

    Turn the power off and make sure the motor will turn. If it turns freely, the capacitor is a good starting guess. It's under the bump on top of the motor.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Pentair Challenger Hums...Doesn't run.

    In the time between my original post and your reply, I called the pool store. The tech told me that I need a new motor and asked if I want a new motor or a new motor and pump. I said I didn't know and that they would have to tell me that.

    So they said they are going to order me a motor. It won't be in for a few days and I wonder what will happen if it is actually something with the pump?

    JohnT, back to your advice: I removed the shaft cap from the back of the motor and the motor spins fine. I can hear water movement when I turn it. I have located the capacitor. How do I check it? Or is it just a "replace and hope it fixes it" deal?

    Additionally, based on the fact that the shaft turns freely I am more comfortable with the motor being the problem here instead of the pump. Is that reasonable thinking?
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Mod Squad JohnT's Avatar
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    Re: Pentair Challenger Hums...Doesn't run.

    Quote Originally Posted by Thinkly
    Additionally, based on the fact that the shaft turns freely I am more comfortable with the motor being the problem here instead of the pump. Is that reasonable thinking?
    I'd about bet on the capacitor. It will probably be about $20 and 5 minutes to replace it. Do you have a multimeter?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Pentair Challenger Hums...Doesn't run.

    Quote Originally Posted by JohnT
    Quote Originally Posted by Thinkly
    Additionally, based on the fact that the shaft turns freely I am more comfortable with the motor being the problem here instead of the pump. Is that reasonable thinking?
    I'd about bet on the capacitor. It will probably be about $20 and 5 minutes to replace it. Do you have a multimeter?
    Yes, I have a multimeter.
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Mod Squad JohnT's Avatar
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    Re: Pentair Challenger Hums...Doesn't run.

    Shut your power off to the motor. Short across the capacitor leads with a screwdriver or clip lead. Remove the cap from the wiring and set your meter to Ohms on the highest range. Put the probes on the terminals of the cap. A working cap should start near zero and climb until it overranges.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: Pentair Challenger Hums...Doesn't run.

    JohnT, I owe you a beer. Actually I owe you several. $27 for a new capacitor and I am pumping water again. This saved me a lot of money and a headache. The pool company had ordered me a new motor and they were set to replace it, if I hadn't gotten your advice.

    Seems strange that they wouldn't have came out and did this on there own? At least they could have made the profit off the service call and marking up the capacitor? Oh well, I am happy to reap the benefits thanks to your great advice. Thanks again!
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Mod Squad JohnT's Avatar
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    Re: Pentair Challenger Hums...Doesn't run.

    Good deal. That's the great thing about a place like this. You get all the experience of everybody here without having to learn it the hard way.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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