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Thread: Hayward Heater H400FDN

  1. Back To Top    #1

    Join Date
    Jan 2015
    Location
    League City, Texas
    Posts
    1

    Hayward Heater H400FDN

    Noticed today but had no time to troubleshoot that my heater was running and should not have been.
    Tried to place the heater in standby but pressing the mode button but did nothing. The Spa, heating and service lights were lit up. Had to turn the breaker off.
    Any ideas before I get started? I recently had one of boards changedout but not sure which one it was.

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: Hayward Heater H400FDN

    Did you find the problem?

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