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Thread: Pentair MiniMax E04, Unit shuts off

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    Join Date
    Feb 2015
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    Mansfield,TX
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    Pentair MiniMax E04, Unit shuts off

    Hello,
    I have a Minimax that is displaying the E04 code.
    -I turn on the heater and get the "LO" message
    - the fan comes on and after a while the display totally shuts off
    - the unit restarts (including the fan) and displays the "LO" message
    - after a few minutes i get the "E04" message

    The vent on the top of the unit is clear, the air flow is pretty light when it starts.
    I suppose the fan is faster after it starts heating, I just remember hearing the noise

    I worked on it late at night and I did pull the leads off the flow switch and short them to see if that was the problem, no change.
    I need to check with a meter and see if I have voltage or if the switch is made.

    Any other tips before I dig into it?

    Thanks again for the replies

  2. Back To Top    #2
    JasonLion's Avatar
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    37,879

    Re: Pentair MiniMax E04, Unit shuts off

    Welcome to TFP!

    E04 tends to mean either that the fan isn't blowing strongly enough due to bearing or debris issues or the fan motor needs a new start capacitor.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Pentair MiniMax E04, Unit shuts off

    I will check this right after the bad storm we have tomorrow! Thanks

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    ps0303's Avatar
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    Re: Pentair MiniMax E04, Unit shuts off

    I also wonder if the can has water in it. Remove the bottom most bolt on the header and if water comes out, you have a hole in your heat exchanger.
    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,

  5. Back To Top    #5

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    Mansfield,TX
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    Re: Pentair MiniMax E04, Unit shuts off

    20150306_172800 (1).jpg

    Thank you for all your help!

    It looks like the problem was either squirrels or mice during the winter.

    They chewed a hole in my pressure switch line.

    $3 and I'm back up and running

    - - - Updated - - -

    When I was trying to dummy the pressure switch, I must have not been doing it long enough.

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