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Thread: Aqua Rite cell voltage cycling

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    Join Date
    Jun 2015
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    central square ny
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    Aqua Rite cell voltage cycling

    Hello Everyone,
    I'm new to this forum, this is my first post. After noticing some algae in my pool, I checked the Aqua Rite, and saw that the cell voltage was not within the range specified in the manual. The voltage goes up to about 18.8 and then drops down to .9, where it stalls for a moment, and starts climbing again. When it gets to 17.0, the top 2 LED's come on, it then continues to climb to 18.8, the LED's go out, the voltage drops to .9, and the cycle starts again, ad infinitum. This cycle occurs when the switch is off or on auto. I have searched this forum, and did see a description of similar symptoms, but the subsequent postings didn't seem to address the problem. I dont see any obvious damage in the control box. I called the toll free number for Hayward, after reciting the diagnostic values to the "service" person twice, he suggested that I call the people who installed the SWG. I called them, they cant get here for a week, and i'm pretty sure they are just going to want to replace the whole control. It seems like I could get out of this without replacing the control. I'm pretty handy and I got a multimeter and i'm not afraid to use it. Anybody got any suggestions?

    Thanks in advance,
    Rick

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    Re: Aqua Rite cell voltage cycling

    Thermistor. Black quarter sized disc on board. As322ro25 or sl322ro25. Replace. Google current limiter aquarite.

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    Jun 2015
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    central square ny
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    Re: Aqua Rite cell voltage cycling

    Thank you James, I had seen a number of references to that part in various threads, I was looking for confirmation. I just ordered three from digikey, I'll post my results in a few days.

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    Rocklin Ca
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    Re: Aqua Rite cell voltage cycling

    Mine was doing the same thing So I replaced the Thermistor didn't help at all. But if your capable and confident to try and replace it yourself I would try it, the Thermistor is pretty cheap compared to a new circuit board. Only advice I would give is use a heat sink on the Thermistor when soldering in the new one , alligator clip , forceps or heat-sink work. How old is your unite?
    In ground 20,000gal - pebble-tec - salt, Intelliflo pump, Sta-Rite filter 450 sq ft ,Hayward 6060 booster pump, non functioning Aqua Rite SWCG, TF 100 test kit.

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    Re: Aqua Rite cell voltage cycling

    Quote Originally Posted by SacDave View Post
    Mine was doing the same thing So I replaced the Thermistor didn't help at all. But if your capable and confident to try and replace it yourself I would try it, the Thermistor is pretty cheap compared to a new circuit board. Only advice I would give is use a heat sink on the Thermistor when soldering in the new one , alligator clip , forceps or heat-sink work. How old is your unite?
    Try replacing the thermistor again. If you don't get it right, it won't work. Bad voltage is almost always the thermistor.

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    Join Date
    Jun 2015
    Location
    central square ny
    Posts
    3

    Re: Aqua Rite cell voltage cycling

    After taking the board out, I was able to better inspect the components. The thermistor had a crack, and when I removed it from the board, it fell in half. I installed the new thermistor, reinstalled the board, and the cell voltage is now correct. Thank you JamesW for the incredibly fast response with right solution.

    SacDave- Four years

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