Display shows ICE or ICE2, pumps run automatically even when spa is not in use.

Safety: Do not shut off power to the spa during freezing weather; this mode protects plumbing from damage.

• Confirm weather conditions: If it is near or below freezing, this is normal operation. Leave the spa powered and covered.
• Check temperature reading: If ICE appears in warm weather, compare the displayed temperature to an external thermometer. A large discrepancy suggests a bad sensor.
• Inspect sensors and wiring: With power off, check the temperature sensor and any ambient sensor wiring for damage. Replace the faulty sensor if needed.