Expert Q&A: Troubleshooting Intellichlor IC40 – Red Light Indicator for Cold Water Off

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Understanding the Intellichlor IC40 Red Light Indicator

If you’re noticing a red warning light on your Intellichlor IC40 salt chlorine generator, specifically indicating that the “Cold Water Off” feature is active, it’s essential to understand what this means and how to address it effectively.

What Does the Red Light Signify?

The red light on your IC40 unit serves as an alert that the system has detected that the water temperature has dropped below the optimal operational range. This safety feature prevents damage to the cell and ensures proper sanitation by suspending chlorine generation when the water is too cold.

Why Does Cold Water Turn Off Chlorine Generation?

Cold water can adversely affect the electrolysis process, leading to decreased efficiency or potential damage to the cell. To safeguard the equipment and maintain system integrity, the IC40 automatically halts chlorine production when temperatures fall below a certain threshold, indicated by the red light.

How to Resolve the Issue

  • Check your water temperature: Use a reliable thermometer to measure the pool water temperature. If it is below the recommended range (usually around 50°F or 10°C), consider heating the water to bring it into optimal operating conditions.
  • Allow the system to warm up: If the water temperature is too low, simply wait until the pool warms naturally or use a pool heater to raise the temperature. Once within the operational range, the red light should turn off automatically.
  • Inspect the system: Ensure that there are no other issues, such as wiring problems or sensor malfunctions, which could cause false alerts. If unsure, consulting a professional technician is advisable.
  • Reset the system: After addressing the temperature issue, reset the IC40 unit according to the manufacturer’s instructions to clear the red indicator light.

Additional Tips

Regularly monitor your pool’s temperature and system indicators to prevent unexpected shutdowns. Proper maintenance and timely adjustments will help extend the lifespan of your salt chlorinator and ensure your pool remains clean and safe.


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