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Thread: Hayward electric spa heater

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    Hayward electric spa heater

    Good afternoon!
    My spa has a Hayward 5KW heater attached and I'm instantly blowing the fuse when I turn the temp. indicator up. I suspect the heater element is bad because I'm only reading 10.3 ohms. Not KOhms.
    That seems very low so I suspect a short.
    Should add it's 220V.
    Any insight would be greatly appreciated. There's not too much to it and my call to Hayward tech support never got answered.
    TIA
    KW
    10,000 gallon
    Sand filter In-Ground, INDOORS, fiberglass
    45gpm,
    Heat set to 92 degrees, sodium hypochlorite
    Commercial Pool

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    Mod Squad Bama Rambler's Avatar
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    Jun 2009
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    SouthWest Alabama
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    Re: Hayward electric spa heater

    10.3? is exactly what you should be reading for a 5kw heater. Is that reading with it installed? I'd say your problem is somewhere else.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Hayward electric spa heater

    Hi Bama Rambler,
    I see I never sent the reply I thought I did. I was on hold for so long with Hayward that they responded after I sent this post. But here's the new twist: I disconnected the wires to the heating element and turned the heater back on. Everything lit up like it should, I heard the relay click, I measured the voltage at the two disconnected wires (to the element) and got 220? I don't know how, but don't you think it's the element?
    10,000 gallon
    Sand filter In-Ground, INDOORS, fiberglass
    45gpm,
    Heat set to 92 degrees, sodium hypochlorite
    Commercial Pool

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Hayward electric spa heater

    Did you check continuity to ground? The element appears good but it could have a short to the case and that would trip the breaker.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Hayward electric spa heater

    I'll check on Monday. Thank you for staying with me on this.
    10,000 gallon
    Sand filter In-Ground, INDOORS, fiberglass
    45gpm,
    Heat set to 92 degrees, sodium hypochlorite
    Commercial Pool

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