Artisan Spas Temperature Regulation Instability

Water temperature fluctuates widely, overshooting or undershooting the set temperature.

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.

Possible Causes

Aging or misreading temperature sensor, Poor sensor contact with heater tube, Control board hysteresis issues, Heater relay sticking intermittently

Safety first: Turn off power before adjusting or replacing sensors.

Verify with external thermometer: Compare displayed temperature to an independent thermometer in the spa water.
Inspect sensor mounting: Ensure the temperature sensor is firmly attached to the heater tube or properly seated in its well.

If fluctuations persist, replacing the temperature sensor is the first step; if that fails, the control board may need replacement.

Medium 3/5

Temperature Sensor

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