Pentair Pentair IntelliChlor IC40 Salt Chlorine Generator COLD WATER Error Fix: Cold Water Shutdown

Error code COLD WATER on the Pentair Pentair IntelliChlor IC40 Salt Chlorine Generator means: Cold Water Shutdown. The water temperature has dropped below approximately 50 degrees Fahrenheit (10 degrees Celsius). The IntelliChlor automatically shuts down chlorine generation in cold water to protect the cell plates from damage. This is normal winter/cold weather behavior, not a malfunction. Chlorine generation will automatically resume when water temperature rises above the threshold. During the off-season, pool chlorination should be maintained with liquid chlorine or tablets.

The most successful fix is "Inspect and Test Temperature Sensor Circuit" (medium difficulty, ~45 minutes). Estimated DIY cost: $0-$10. HomeMD has 2 community-ranked fixes for this error.

This error is rated info severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Inspect and Test Temperature Sensor Circuit") is rated medium difficulty and takes about 45 minutes. Tools needed: Multimeter, Phillips screwdriver, Needle-nose pliers.

DIY cost: $0-$10. Professional repair typically costs $120-$200. Many homeowners save money by trying the top-ranked community fix first.

The Pentair Pentair IntelliChlor IC40 Salt Chlorine Generator has 8 other known error codes, including: CELL SCALING (Calcium Scale on Cell Plates), CELL WARNING (Cell Nearing End of Life), CHECK CELL (Check Salt Cell), COMM ERROR (Automation Communication Error), FLOW SWITCH STUCK (Flow Switch Stuck), and 3 more.