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Thread: Pool Light Not Working, GFCI Tripped

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    Join Date
    Apr 2016
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    Houston, TX
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    Pool Light Not Working, GFCI Tripped

    Hi All,

    I noticed a few months ago when I went to plug in my cell phone to the GFCI outlet below the pool light switch, that the GFCI was tripped and would not reset. So I gave the pool light switch a try and, sure enough, the light does not turn on either. What is the order of operations to determine where the problem lies with the tripped GFCI so that I can get everything working again and can stop worrying about swimmer electrocution?
    IG, Plaster, 15,000 gal, Free-form (angular)
    Pentair FNSP 48 DE filter (48 sqft)
    Hayward SP3010X15AZ pump with 1.5 HP motor (installed 3/2015)
    Rock waterfall, large live oak shades half the pool
    Re-plastered April, 2017

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    Mod Squad JohnT's Avatar
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    SW Indiana
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    Re: Pool Light Not Working, GFCI Tripped

    Chances are your light gasket has failed. Pull the light out and get it up on the deck and take a look. Should be enough wire to get it up there.
    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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    Join Date
    May 2016
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    Orlando/Florida
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    Re: Pool Light Not Working, GFCI Tripped

    My light is wired through a GFCI outlet also, first power hits outlet, then it send power to lights. Could be a bad GFCI outlet. I would turn off power from source going to pool equipment box, test that it is dead. Then tighten all the lugs on the common bar(usually white wires), then tighten wires on grounding bar(usually green wires), and finally all lead wires going out of breakers.
    ***Only try this if you know what you are doing electrically.

    The way mine is wired. I believe, if lights were in off position, the outlet is receiving power, it should reset. Or I could remove 2 leads going to lights and try to reset GFCI.
    20' x 32' (22,200 Gal.), I/G Stonescape finish pool, Pentair Intelliflo VF 3 Hp pump, Pentair CC200 filter, Pentair Intelliflo IC40 SWG, built 2014, TF-100 test kit w/ Speed stirrer.

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    Re: Pool Light Not Working, GFCI Tripped

    I'm with John, I'd first pull out the light and inspect to see if the gasket has failed.
    22k gallon IG pebblefina, Jandy 1.5 HP VS, Jandy CV Cartridge filter, Fafco solar panels, Polaris 360 supply side cleaner, waterfall

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    TFP Guide

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    Jun 2012
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    Re: Pool Light Not Working, GFCI Tripped

    Most all GFCI's will not reset if there is no power to them. first thing I would check is the power source to the GFCI (breaker/fuse). If that is good, I would suspect that the GFCI did it's job and I would start looking for the fault. As was mentioned, you may have a failed gasket in the light itself. After seeing how a lot of nightmares are wired up over the years with personal experience and stuff I see on this forum, it would be hard to troubleshoot this without seeing pictures of how everything is wired up.
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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    Apr 2016
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    Houston, TX
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    Re: Pool Light Not Working, GFCI Tripped

    There is an amber indicator light on the GFCI outlet itself next to the "Reset" button, so it should be powered. I will hopefully get to check the light today or tomorrow.
    IG, Plaster, 15,000 gal, Free-form (angular)
    Pentair FNSP 48 DE filter (48 sqft)
    Hayward SP3010X15AZ pump with 1.5 HP motor (installed 3/2015)
    Rock waterfall, large live oak shades half the pool
    Re-plastered April, 2017

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    Join Date
    Apr 2016
    Location
    Houston, TX
    Posts
    51

    Re: Pool Light Not Working, GFCI Tripped

    Replaced old GFCI with new GFCI and everything is working properly now (pool light & outlet).

    IG, Plaster, 15,000 gal, Free-form (angular)
    Pentair FNSP 48 DE filter (48 sqft)
    Hayward SP3010X15AZ pump with 1.5 HP motor (installed 3/2015)
    Rock waterfall, large live oak shades half the pool
    Re-plastered April, 2017

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