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Thread: Spa tripping breaker

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    Join Date
    Jun 2014
    Thompson, ND

    Spa tripping breaker

    I drained my spa and turned it off. What I didn't know was that it automatically turned itself on after 30 minutes. It ran in cycles all night with very little water in the spa. Now the breaker trips immediately. I disconnected the different systems and it seems it may be the circ pump or the heater causing it. What could be ruined by running a spa without water?

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Spa tripping breaker

    Welcome to TFP!

    The heater is very sensitive to being run without water. They pump(s) may also have failed, though that is more of a 50/50 chance thing than certain.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: Spa tripping breaker

    Sounds like there may be some damage to the pump. As pumps age, more mechanical resistance develops in the motor and wet end. Running them dry will rapidly accelerate that process. As that mechanical resistance increases, more amperage is needed to run the pump at its designated RPM. That increased amperage draw is what is tripping your breaker. My spa does this occasionally when for instance both pumps are on high and the heater is trying hard to warm the water = maximum amperage draw. It could also be the heater but the timing points to possible pump issues.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Hudson, WI

    Re: Spa tripping breaker

    Have you been able to disconnect the heater or turn it all the way down / off so you can see if turning only the motor on trips the circuit breaker ??
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
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    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
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