HOT
Sundance Spas
Over-Temperature Condition (Water Too Hot)
Display shows HOT; spa temperature is above safe operating range and heater is disabled.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Stuck heater relay on control board, Incorrect sensor reading high, Prolonged high ambient temperature with cover on, Circulation failure causing localized overheating
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker. Do not enter the spa until the water cools to a safe temperature.
- 1. Remove cover: Allow the spa to cool naturally with the cover off.
- 2. Verify temperature: Use a separate thermometer to confirm actual water temperature.
- 3. Inspect circulation: Once cooled and power is restored, verify that the circulation pump is running and that there is good flow through the heater.
- 4. Monitor heater operation: If the heater energizes when the water is already at or above set temperature, the heater relay or sensor may be faulty.
- When to call a technician: Overheating can be dangerous. Have a professional test the heater relay, sensors, and circulation system.
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Repair Difficulty
Hard
4/5
Required Part
Control Board (Heater Relay)
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