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Thread: Haywood T400 Heater problem

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    Haywood T400 Heater problem

    My heater (Haywood T400) has started to rumble. It still heats the water, but it sounds like it is getting ready to take off like a rocket ship!
    I thought there might be some stone stuck inside, but that doesn't appear to be the problem.
    20 x 54 Sharkline Oceanic
    1 1/2 hp White River
    22" Sparco Hi-Rate Sand Filter
    Nature 2 Sanitizer

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    dmanb2b's Avatar
    Join Date
    Apr 2009

    Re: Haywood T400 Heater problem

    Welcome to TFP
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

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    Join Date
    Oct 2010

    Re: Haywood T400 Heater problem

    Rumbling, banging or bumping is normally a sign of inadequate water flow through the heat exchanger.

    Here are a couple of easy things to check.
    Be sure your pool filter is clean. If you are using a two speed or variable speed pump, adjust to higher output setting.

    If the problem persists, contact your local service technician to check for blockage inside the heat exchanger.

    Continued use of the heater with inadequate water flow could lead to extensive (expensive) damage to your unit. Have it serviced soon.

    20x40 free-form IG vinyl, 1hp Hayward superpump, Hayward pro grid DE filter, Raypak heatpump, Goldline Aquarite SWCG, Polaris 280 with booster, and tested using a Taylor K2006.

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

    Re: Haywood T400 Heater problem

    The most common cause of low water flow is a dirty filter. Cleaning the filter is a good place to start.
    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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