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Thread: Minimax 400 starting issue

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    Join Date
    Jun 2014

    Minimax 400 starting issue

    I have a Minimax 400 pool heater. Its been very reliable and was installed in 2000. When I turn on the heater for the pool or spa, it clicks multiple times and usually does not light. I can leave it on as long as I want and it will not start.

    If I take off the front panel and try turning it on again using the switch on the unit, it will then take several attempts but will eventually light. It will run properly as far as I can tell in terms of heating the pool or spa to the preset temp. The inside of the heater is clean and there is no debris around the heater or the air vents.

    If I turn the heater off and then turn it back on within a few minutes, it will light up quite easily.

    Does this issue sound familiar to anyone? I would like the heater to light with confidence and consistency as I have a Jandy unit and can control it from the house whenever I would like to pre-heat the spa. As it currently runs, I need to go out to the heater and remove the door and try multiple times using the spa/pool heater switch on the unit to get it to light.

    I'm very handy but I was hoping someone might be familiar with this issue and start me in the correct direction.

  2. Back To Top    #2
    Casey's Avatar
    Join Date
    Apr 2007
    SW PA

    Re: Minimax 400 starting issue

    Welcome to TFP Heatwave!

    I am not sure of your problem but it sounds so frustrating! Someone with more knowledge will be around to help!

    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

  3. Back To Top    #3

    In the Industry

    ps0303's Avatar
    Join Date
    Jul 2011

    Re: Minimax 400 starting issue

    I'm not making any connection with removing the door and the unit lighting unless there is an air flow issue thus not allowing the combustion to happen correctly.
    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,

  4. Back To Top    #4

    TFP Guide

    Join Date
    Jun 2012
    western NY

    Re: Minimax 400 starting issue

    Just wondering if some of the burner tubes may have some clogging and the open door allows a slightly different air movement to allow it to light
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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