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Thread: Hayward H400fd showing PF error code

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    Join Date
    May 2014
    Fort Worth, TX

    Hayward H400fd showing PF error code

    I have a Hayward H400FD heater that is throwing a PF error code which is supposed to indicate a wiring/low voltage error. It's wired 240v so the 120v reverse polarity isn't an issue. I have tested line to line and get 240v. I have tested line to ground and get 120v and 119.5v. So from what I can tell it should be working. Anybody out there have any ideas about what to look at next?

    Thanks in advance.
    20k(?) IG plaster, Hayward DE6020, 2.0HP Hayward Tristar, build year 1998, attached raised spa, Hayward Universal H-Series Low NOx heater, aux pump, TFTestkits

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    ps0303's Avatar
    Join Date
    Jul 2011

    Re: Hayward H400fd showing PF error code

    If everything checks out as you say, then the only other thing is the field wiring panel, FDXLFWP1930.
    Paul 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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    Re: Hayward H400fd showing PF error code

    Did you find out what the cause was? I have the same issue.

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