The light most owners call the "check cell" light is labeled Inspect Cell on a Hayward AquaRite, and it means two different things depending on whether it's lit alone or together with Check Salt: a maintenance reminder on a timer, or the unit telling you it has stopped making chlorine. Everything below comes from Hayward's own AquaRite diagnostics manual.
Redzone Pools services Hayward AquaRite and TurboCell systems across Cypress, Tomball, Katy, Spring and Greater Houston — licensed, insured, usually same day.
An AquaRite control box has four warning lights that Hayward's manual troubleshoots by name: No Flow, Check Salt, High Salt and Inspect Cell. There is no light labeled "Check Cell." When people search for the check cell light, this is the one they mean.
What matters is not just that Inspect Cell is lit, but how — flashing or solid — and what's lit next to it. Hayward's manual describes three distinct situations:
Note which one you have before touching anything: the reset for the first is one button-press, and pressing it in the third clears nothing.
The AquaRite keeps a countdown of 500 operational hours. When it expires, the Inspect Cell light flashes on its own as a reminder to pull the TurboCell and look for scale. That's all it is — a timer, not a measurement. The unit hasn't tested the cell; it has counted hours.
It also doesn't clear itself. Hayward's words: "Requires manual reset." Press and hold the Diagnostics button — the small button next to the display — until the light goes out, roughly 3 to 5 seconds. That restarts the countdown for another 500 hours.
Use it honestly: inspect the cell, clean it if the plates show white deposits, then hold the button — Hayward's cleaning instructions end with exactly that step. Resetting without looking just silences the reminder, and in Houston's hard fill water, where Hayward itself expects three to four cleanings a year, that's how a cell scales up unnoticed until Check Salt joins it.
When Check Salt and Inspect Cell light together, the control is reporting a low salt reading. Flashing means it reads 2,500–2,600 ppm and is still generating; solid means 2,300 ppm or less and generation is halted. Hayward's target range is 2,700–3,400 ppm, with 3,200 ideal.
Two more things put both lights on solid, and neither is a salt problem: the control is set for the wrong TurboCell type, or the cell is unplugged. If the lights came on right after a cell was swapped, start there.
Hayward's order matters, because the reading on the box is only the unit's estimate of salt:
Here's every panel state the manual covers, in one place:
| Lights | What the control is reporting | What to do |
|---|---|---|
| Inspect Cell flashing, alone | 500 operational hours have elapsed since the last reset. | Inspect and clean the cell if needed, then hold Diagnostics 3–5 s until the light goes out. |
| Check Salt + Inspect Cell flashing | Salt reads 2,500–2,600 ppm. Still producing chlorine. | Independent salt test first; then inspect and clean the cell. |
| Check Salt + Inspect Cell solid | Salt reads 2,300 ppm or less. Production halted. Also shown if the cell type is set wrong or the cell is unplugged. | Salt test, cell inspection, cell type and plug; then the voltage and amperage check. |
| High Salt | Cell amperage is above the maximum for the cell type. | Independent salt test; if genuinely high, partial drain and refill toward 3,200 ppm. Also confirm the cell type setting. |
| No Flow | The flow switch isn't seeing enough water; it can flash for up to 60 seconds after the pump starts before settling. | A different problem from the cell — pump, filter and flow switch, not salt. |
| Display reads COLD or HOT | Water below 50°F or above 140°F; the cell operates between the two. | Normal in cold water. A reading of 215°F means the cell's temperature sensor has shorted and the cell needs replacing. |
One more behavior worth knowing: below 60°F the AquaRite scales chlorine output back to 20 percent, and at 50°F it stops. That's by design, not a fault.
This is the part of Hayward's manual that saves people the most money. The salt figure the AquaRite displays is calculated from what the cell is doing, not measured in the water — so a scaled or aging cell makes the unit report low salt in a pool that has plenty.
The manual's rule: a low-salt reading always calls for a cell cleaning first, then a real meter test of the water. If the cell is clean and the water tests correct, the cell is aging — the manual calls that acceptable as long as free chlorine is where it should be, and says never add salt in that situation. Adding salt to a pool that already tests right doesn't fix an aging cell; it just leaves you with a high-salt pool and the same cell.
If free chlorine is falling short with a clean cell and correct salt, Hayward's remedy is to raise the Desired Output dial in a 25 percent step, wait 24 hours and re-test. When the dial is already near the top and the pool still won't hold chlorine, replacing the cell becomes the better spend.
The same false-low reading, across brands and with the sensor cause included, is covered in why a salt cell says low salt when the salt level is fine.
Hayward's manual says to hold the removed cell up to plenty of light and turn it — the smaller deposits sit deep in the plate stack, and a cell can need cleaning even when nothing is obvious at first glance. Its mix is one part muriatic acid to four parts water, cell standing on end for 15 minutes, then flipped for another 15; the cord can go in, the connector must not. The safety rules and the general procedure are in our salt cell not working guide.
Two steps after the rinse that owners routinely skip. First, hold the Diagnostics button about 3 seconds to restart the 500-hour countdown. Second — only if the cell was cleaned because of a low-salt reading — reset the unit's average salt reading, or it goes on reporting the old number: Main Switch to Off, back to Auto, wait for the relay to click, about 5 to 10 seconds. The manual calls for the same reset at start-up and whenever a cell is replaced.
How often? Hayward's guidance is that keeping pH at 7.2–7.8 should hold hard-water pools to three or four cleanings a year. Greater Houston is hard-water territory — the reasons are in why Houston's fill water is hard on pool equipment — so treat that as the expectation, not the worst case.
Searches often pair the AquaRite's cell light with the message "No Cell Power." They don't belong together. The AquaRite's manual has no such message — it communicates through the lights above and a small numeric display. "No Cell Power" is text shown by Hayward's automation controllers (AquaLogic, ProLogic, Aqua Plus), which run a cell from a larger panel; if you're reading those words on a screen, the checks are different. Likewise, a No Flow light is the flow switch reporting on your pump and filter, and no amount of cell cleaning changes it — that one, including the variable-speed pump trap behind most of them, is in salt system says no flow but the pump is running.
The Pentair equivalent of all this — a green Cell light that flashes when the cell needs inspecting — works on different rules and different salt numbers; we decoded it separately in the IntelliChlor inspect-cell light.
Reasonable to do yourself: read which lights are lit and whether they're flashing; test the salt independently before adding anything; pull, inspect and clean the cell; reset the reminder; reset the average salt reading after a cleaning or a new cell.
Stop and call: both lights solid with the salt testing fine and the cell clean — that's the voltage-and-amperage check in both polarities, with the cell-type setting and the board behind it. Cell type matters more than people expect: the AquaRite ships set to t-15, and with a different-size cell installed the salt reading, amperage and voltage are all wrong and the unit shuts the chlorinator off. Sorting that out is part of our salt system repair service — we'd rather check a setting than sell you a cell.
On its own, flashing, it means the unit's 500-operational-hour countdown has expired and it's reminding you to inspect and clean the TurboCell — nothing has been measured. Lit together with Check Salt, it means the control is reading low salt: flashing at 2,500–2,600 ppm with chlorine still being made, solid at 2,300 ppm or below with production stopped. The pairing is what tells you which situation you're in.
Press and hold the Diagnostics button next to the display until the light goes out, about 3 to 5 seconds. That restarts the 500-hour countdown. Hayward's instructions put that step after inspecting and, if needed, cleaning the cell — resetting first just turns off the reminder without doing what it was reminding you to do.
The unit is reporting salt at 2,300 ppm or lower and has stopped generating. Before adding salt, test the water independently — the displayed figure is calculated from the cell and a dirty or aging cell drags it down. Both lights also come on solid if the control is set for the wrong TurboCell type or the cell is unplugged, which is common right after a cell swap.
Yes — the AquaRite's panel is labeled Inspect Cell, and "check cell" is how most owners describe it. The lights Hayward's manual actually troubleshoots are No Flow, Check Salt, High Salt and Inspect Cell. "No Cell Power," which often gets mixed in, is not an AquaRite message at all; it appears on Hayward's AquaLogic, ProLogic and Aqua Plus automation controllers.
Not until an independent test agrees. Hayward's manual says a low reading always calls for a cell cleaning first and then a real measurement of the water. If the cell is clean and the water tests in the 2,700–3,400 ppm range, the cell is aging and the manual is explicit: never add salt in that case. If chlorine is falling short, raise the output setting instead — and if it's already near maximum, the cell is due for replacement.
Hayward's own guidance is three to four cleanings a year in hard-water areas when pH is held at 7.2–7.8, and Greater Houston's fill water qualifies. The 500-hour reminder is a floor, not a schedule: inspect when the light flashes, and again mid-season.
Flashing or solid, alone or with Check Salt, and what an independent salt test says — with those three things we can usually tell you on the phone whether it's a reset, a cleaning, a setting or a cell. Licensed, insured, serving Cypress and Greater Houston.