Understanding salt chlorinator faults

Overview

A low-salt warning, no-flow message or low chlorine reading does not automatically prove a failed cell. Water temperature, flow, salt concentration, scale, run time, output setting, cell age, wiring and controller condition all affect operation.

Check first

• Photograph the exact message, indicator lights, output setting and operating mode.
• Confirm the circulation pump is running and the cell housing is full of moving water.
• Check the recent independent salt and free-chlorine test results rather than relying only on the controller display.
• Inspect the visible cell plates for scale with power isolated, without scraping coatings.
• Review water temperature, pump schedule, recent rain, swimmer load and any chemistry changes.

Stop and call a technician

• The controller trips power or shows heat, smoke or a burning smell.
• The cell housing or unions leak.
• Cell cable insulation, plugs or terminals are visibly damaged.
• Chlorine is not being maintained and water clarity is changing.
• The same warning returns after flow and independent water results are confirmed.

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