Display shows two dashes or blank temperature reading; spa may not heat

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

Unplugged or failed temperature sensor, Broken sensor wiring, Control board sensor circuit fault

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

Inspect sensor connection: Open the equipment bay and locate the temperature sensor plug on the control board. Ensure it is fully seated.
Check cable: Follow the sensor cable to the heater manifold, looking for cuts or pinch points.
Replace sensor: If the cable is damaged or the sensor tests open/shorted (with a multimeter), replace it with an Artesian-compatible thermistor.

If a new sensor does not restore temperature display, the control board may need replacement.

Medium 3/5

Heater Temperature Sensor (Thermistor) for Artesian Spas

Check Price on Amazon

We may earn a commission from links on this page.