Kripsol Temperature Overshoot / Control Lag

Heater runs but spa temperature overshoots the setpoint significantly 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

Temperature sensor located too far from spa, High flow rate causing delayed sensor response, Sensor installed on pool line instead of spa line, Control algorithm not tuned for small volume spa

How to Fix / Troubleshooting

Safety first: Turn off power before moving sensors or changing plumbing.

  • Check plumbing: Ensure the Kripsol temperature sensor is installed in the correct line (spa return) when heating the spa.
  • Relocate sensor: Move the sensor closer to the spa or into a dedicated spa return line for faster response.
  • Reduce flow: Slightly reduce flow through the heater when in spa mode to minimize lag, but maintain minimum required flow.
  • Adjust setpoint strategy: Set the spa temperature slightly lower than desired and monitor actual water temperature to compensate for overshoot.
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Repair Difficulty

Medium 3/5

Required Part

Kripsol water temperature sensor
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