Display shows ICE or IC; pumps may run automatically even when spa is not in use.

Safety: Do not disable freeze protection in cold climates; it prevents plumbing damage.

• Verify actual water temperature: Use a separate thermometer to confirm the spa water temperature. If it is near freezing, allow the spa to run; this is normal behavior.
• Check cover and insulation: Ensure the Hydropool cover is properly sealed and in good condition to reduce heat loss. Inspect cabinet panels for gaps.
• Sensor sanity check: If the water is warm but ICE is displayed, the temperature sensor may be reading incorrectly. Follow the sensor inspection steps (see Sn1/Sn2) and reseat the connector.
• Power reset: Turn the spa OFF and back ON to clear any temporary logic error. If ICE returns with warm water, the sensor or control board may be faulty.
• Call a technician in case of false freeze: Persistent false freeze protection can overrun pumps and increase energy use; have a Hydropool technician test the sensor and control pack.