COOL
Dream Maker Spas
Cool condition or sensor-based delay
Display shows COOL and heater does not run even though set temperature is higher
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Possible Causes
Water temperature significantly below set point, Control pack delaying heat to protect components, Sensor reading unstable after refill
How to Fix / Troubleshooting
Safety first: Ensure spa is full before powering on.
Steps:
- Verify sensors: After a fresh fill, allow the spa to run for 10–15 minutes so sensors stabilize.
- Check mode and set point: Confirm the spa is in STANDARD/READY mode and the set temperature is above current water temperature.
- Allow time: COOL may clear automatically once the system confirms stable readings and begins heating.
- If COOL persists in warm water: Test and replace the temperature sensor if it is reading incorrectly.
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Repair Difficulty
Easy
2/5
Required Part
Water Temperature Sensor (Thermistor)
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