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Thread: [SOLVED] Heater won't start

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    [SOLVED] Heater won't start

    My pentair minimax 100 isn't firing up. The control knob (mechanical) does click when it reaches the point where the heater should be kicking on. I don't see any blinking LEDs, it appears there is nothing happening beyond the mechanical thermostat knob clicking when it should be turning on. In my mind it appears the control knob has power and is working properly, but beyond that nothing is working. No LEDs blinking, nothing. I did find that the main board had a loose ground, pushed that on tightly, no difference. Any ideas?

    TIA
    -Aaron


    PS -- Will take pics if that helps encourage responses
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    TFP Guide

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    Re: Heater won't start

    Is this a standing pilot lite model or is it a spark ignition model?
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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    Re: Heater won't start

    Spark ignition -- the only idea I've come up with so far is possibly there is a bad fuse. I noticed in the manual that there should be an inline fuse. I'll snap some pictures and take a look at it soon.
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    Re: Heater won't start

    First place to start is to check the power source (120 volt). The click you hear in the thermostat is he mechanical contacts "making" the circuit. That is only one of several switches that need to close to complete the circuit. You will need to verify that all switches/sensors are completing the circuit. If that is the case then it could possibly be the board. Was the heater running recently?
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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    Re: Heater won't start

    Unfortunately I wasn't able to take any pics or check to see if there is an inline fuse to replace. It was raining, I will get to it tomorrow night.

    The heater was running overnight on Friday. I did notice in the manual that a (multi)volt meter can be used to troubleshoot by checking various connections. I could easily pick one up and try to narrow it down, but I can't say that I'm familiar with how the system works.
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    Re: Heater won't start

    Strange, last night I got it working. Tried it with pump on high to make sure there was enough flow (it has always run on low speed before) and it worked. I did notice a rattling noise coming from inside the heater where the pipes connect. I then test it on low speed and it's working, no rattle.

    On high speed the psi goes up to around 18, which is normal. Low is around 5 psi.
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    Re: [SOLVED] Heater won't start

    Pressure switch might be set just on the edge of where the low speed pressure is. It may have also been stuck and the high speed may have freed it up.
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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    Smykowski's Avatar
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    Re: [SOLVED] Heater won't start

    Have you checked the manual? You might be able to adjust the pressure switch.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: [SOLVED] Heater won't start

    Do NOT adjust the pressure switch. They are set at the factory for the specified PSI settings and if you mess with it, you could cause the unit to stay fired when the pump is shut off. This is very dangerous. If you suspect the pressure switch is bad you can easily test it and then replace it.
    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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    Smykowski's Avatar
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    Re: [SOLVED] Heater won't start

    Are you sure this is true for all heaters?
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: [SOLVED] Heater won't start

    A pressure switch is set for the manufacturer so that if the pump is not pumping water, the heater is supposed to shut off. It's a safety that every heater I have ever touched going back 10 years has had one.

    The only time a pressure switch needs to be or ever has been adjusted is because the pool sat up higher than the equipment and the downward water pressure is enough to keep the switch open when the pump shuts off.
    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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    Re: [SOLVED] Heater won't start

    Solved HOW?? Did you readjust the pressure sensor? or replace it????
    23k gallon ig concrete pool, 1hp hayward pump, 36 sq ft de filter, old hayward 350 gas heater
    Philadelphia, PA

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