Clearwater Spas
Temperature Overshoot / Control Calibration Issue
Water temperature overshoots the setpoint by several degrees before heater shuts off.
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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
Temperature sensor out of calibration, Poor water mixing around sensor, Heater relay sticking on Clearwater Spas control board, Incorrect sensor placement
How to Fix / Troubleshooting
Safety first: Monitor water temperature with an external thermometer to avoid scalding.
- Verify readings: Compare displayed temperature to an accurate thermometer.
- Improve circulation: Ensure circulation pump is running properly so water around the sensor is representative of overall spa temperature.
- Sensor replacement: If readings are consistently off, replace the temperature sensor.
If the heater continues to run after reaching setpoint, the control board relay may be sticking and should be replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Temperature Sensor
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