Water temperature overshoots the set point by several degrees before shutting off.

Safety: Turn off power at the GFCI breaker before accessing sensors.

• Verify with external thermometer: Compare displayed temperature to an accurate thermometer in the spa water.
• Adjust setpoint: If the spa consistently runs 2–3°F hot, lower the set temperature accordingly.
• Inspect sensor: Ensure the sensor is fully seated in the heater well and making good contact.

If overshoot is large or increasing over time, replace the water temperature sensor with an Evolution Spas-compatible part.