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Thread: Pentair Intellichlor Red Flow Light / Red Salt Level Problem

  1. Back To Top    #1

    Join Date
    Nov 2014
    Bartow FL

    Pentair Intellichlor Red Flow Light / Red Salt Level Problem


    I'm hoping some of the experts here can be of more help than Pentair has been.

    It is an Intellichlor IC40, manufactured 9/21/2011, version 2.02. Had been working fine until a couple of months ago, when one of the green lights on the % chlorination generation went out. Pentair said nothing could be done, and it was still working.

    Now, it has stopped working, 0% chlorine output and no chlorine in the pool. I acid cleaned the cell, which was definitely in need of cleaning. I cleaned the DE Filter and replaced the DE for it too, but the pressure gauge for it isn't working. Opened all return lines to further reduce any flow restrictions, which I don't think was the problem. Water tested, confirmed salt level of 3300. No phosphates, as I had to ask for the extra test per Pentair's flow-chart of unhelpfulness. Increased the speed of the pump, even to the highest setting with no change, so I've reset it back to normal.

    The red light is lit continuously for Flow, as is the red light, continuously, for the salt level. No other lights are on. The EZ Touch system says "No Communication / Wait 5 minutes," which by now days later isn't going to be communicating with this cell any time soon. The little green light is lit for the EZ Touch system indicating that its portion of the Intellichlor control is working fine.

    It has been a bit cool here in Florida, I don't think I'd want to be swimming in it at this temperature, but I don't think that should be the problem.

    My suspicion is it is the flow sensor. But, I don't know how to check, and I haven't been able to find anybody around here who can either. The local pool place said they stopped selling the Pentair Intellichlor, which I guess indicates something. In the six years, I have replaced the original cell after about three years, and now there is a problem with this one. They claim a five-year lifespan, but reality is obviously different as I have seen during my research online.

    So, is it worth attempting to check the flow sensor? Even if it is the problem, it is a $100 part, toward a three year old questionable unit. Replacing the unit is about $500 or so, which of course I can do myself. Abandoning the salt-water system is undesirable, as I'd be back to buying chemicals, and replacing the Intellichlor with a Hayward would involve about a $1000 investment, so it would have to last twice as long to be worthwhile. The pool store person said though that at that point the Hayward unit could replace individual components, instead of as the Pentair unit being disposable.

    Also, if I replace the IC40 I have, I could go with the IC20 and run it closer to 80% to 100% instead of the 40% to 60% I've had the IC40 set on. That would save about $50. It seems the units go bad long before the lifespan runs out, so with an IC20 I'd have used up more of its lifespan.

    So that's the dilemma I'm hoping somebody here can help with.

    Any help is greatly appreciated. Thank you.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Pentair Intellichlor Red Flow Light / Red Salt Level Problem

    Welcome to TFP.

    If the water temperature is below 60 degrees it might have shutdown due to cold water.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Longview, Texas

    Re: Pentair Intellichlor Red Flow Light / Red Salt Level Problem

    It sounds like a flow sensor to me, but I dont know how to check it either. If it was cold water, it would power down all of the lights except for the water temp light.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge. Experience- it's what's learned just after you needed it most !!

  4. Back To Top    #4

    In the Industry
    Pool Clown's Avatar
    Join Date
    Sep 2008
    Silicon Valley, CA

    Re: Pentair Intellichlor Red Flow Light / Red Salt Level Problem

    Also, you may only be getting three years out of your cell if you run the pump longer per day. Pentair says 5 years is typical if running +/- 8 hr days. Cells are rated for 10,000 hrs. so you can see how 5 years could really be 3. The variable speed pumps would like to see you run 10hrs+ per day. You would see less life from a iC20 as you would have to run higher percent (longer cell run time) or longer pump time to keep up with needed Cl level. Cell life is increased when you over rate the cell for the pool.

    just sayin...
    Factory Warranty Station for:
    Jandy, Pentair, Sta-Rite, Raypak, Polaris,
    and Paramount pool cleaning systems.

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