Replace Cell Warning
Hayward Salt Chlorinator
Severity: ModerateWhat it means
The Hayward AquaRite Replace Cell warning lights up when the cell's hour counter reaches 500 hours — it is a service reminder, not necessarily a fault.
If the cell is still generating chlorine normally, clean the cell and reset the hour counter.
If the cell has genuinely failed (0% output after cleaning), it needs to be replaced.
Affected Models
- Hayward AquaRite
- Hayward AquaRite Pro
- Hayward Turbo Cell T-CELL-3 / T-CELL-5 / T-CELL-9
Common Causes
- Cell hour counter reached 500 hours — scheduled service reminder
- Cell plates scaled with calcium — performance degraded
- Cell at end of life — typically 3–5 years or 10,000 hours
- Previous replacement not logged and counter not reset
How to Fix It
-
Confirm the Replace Cell light came on at the 500-hour service interval.
The AquaRite Replace Cell light blinks (does not stay on) when the hour counter reaches 500 hours.
A solid Replace Cell light indicates an actual cell fault rather than a scheduled reminder. -
Inspect the cell plates for scale.
Turn off the system and remove the cell.
Hold it up to light and look inside — white or grey crusty deposits on the titanium plates mean calcium scale.
A scaled cell cannot generate chlorine efficiently. -
Clean the cell with diluted muriatic acid if scale is present.
Mix 1 part muriatic acid with 10 parts water.
Soak the cell for 5–10 minutes, rinse with fresh water, and reinstall. -
Reset the cell hour counter after servicing.
Hold the AquaRite diagnostic button for 3 seconds until the display changes.
This resets the 500-hour service reminder counter.
Do not reset without servicing the cell. -
Replace the cell if it no longer generates chlorine after cleaning.
A cell at end of life will show 0% output or very low output despite correct salt and temperature.
Hayward Turbo Cells are available through pool dealers — match the cell model to your pool volume (T-CELL-3, -5, or -9).
When to Call a Professional
If the cell is clean and the salt level is correct but output is still at 0%, the cell needs replacing.
Contact a Hayward dealer for the correct cell model.
Frequently Asked Questions
How do I reset the Replace Cell light on a Hayward AquaRite?
Hold the diagnostic button on the AquaRite control board for 3 seconds.
The cell hour counter resets and the Replace Cell light turns off.
Always clean the cell before resetting.
How much does a Hayward Turbo Cell replacement cost?
Hayward Turbo Cell replacements typically cost $200–$400 depending on the cell size (T-CELL-3 for smaller pools, T-CELL-9 for larger pools).
Installation is straightforward and can be done by a homeowner.