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Thread: Hayward H400 Heater won't turn on-no error code

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    Join Date
    May 2014
    Location
    Henderson, NV
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    2

    Hayward H400 Heater won't turn on-no error code

    Hi - We are on our second Hayward heater. It is getting electricity as the standby light is lit. However, when I try to switch it to the pool, nothing happens. The light only stays on standby. The heater shows no error code. I unscrewed the four screws around the display panel but all connections looked okay. The other day the pool was low on water (the autofill is turned off) and the skimmer wasn't receiving a full amount of water causing the error code LO to display along with the service light coming on. That was resolved by putting more water in the pool. I actually had turned off the autofill a couple of years ago after it broke. We have never had problems with this heater for the three or so years we have had it.

    thank you for your help and advice!

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    ps0303's Avatar
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    Jul 2011
    Location
    FL
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    3,436

    Re: Hayward H400 Heater won't turn on-no error code

    If you press the mode button and nothing happens then it's possible the keypad is bad. I would try replacing the keypad and see what happens. The keypad includes the plastic bezel it's on.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Join Date
    May 2014
    Location
    Henderson, NV
    Posts
    2

    Re: Hayward H400 Heater won't turn on-no error code

    Thank you VERY much for your prompt reply! I researched it further and that keypad has been a quick replace item on Hayward heaters.
    VNG

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