HOT
Michael Phelps Spas
High Temperature Condition (Not Full Overheat Lockout)
Display shows HOT and spa functions are limited; water may feel very warm
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Possible Causes
Water temperature above safe operating range, Spa cover left on in hot sun with pumps running, Sensor reading high due to poor circulation around heater
How to Fix / Troubleshooting
Safety: Do not use the spa when HOT is displayed.
- Open the cover: Allow heat to escape and let the water cool naturally.
- Check filtration cycles: Reduce filtration or circulation run times during very hot weather to limit heat gain.
- Verify sensor placement: Ensure sensors are properly seated in the heater manifold and not exposed to localized hot spots.
- After cooling: Once water temperature drops, HOT should clear automatically. If it does not, inspect sensors and control pack.
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Repair Difficulty
Easy
2/5
Required Part
Temperature Sensor Probe
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