Freeflow Spas
Temperature Regulation Drift
Spa heats but overshoots set temperature by several degrees before shutting 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
Aging temperature sensor, Poor sensor contact with heater tube, Control board calibration drift, Water stratification from weak circulation
How to Fix / Troubleshooting
Safety first: Avoid soaking if water is hotter than expected; verify with an external thermometer.
- 1. Cross-check temperature: Use a reliable spa thermometer to compare actual water temperature to the displayed value.
- 2. Improve circulation: Run jets periodically to mix water and reduce stratification, especially on plug-in models.
- 3. Inspect sensor mounting: With power off, ensure the temperature sensor is firmly seated in the heater tube or well.
- 4. Adjust setpoint: Temporarily lower the set temperature a few degrees to compensate until the sensor can be replaced.
Replacing the temperature sensor usually restores accurate control. If not, the control board may require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Temperature Sensor
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