When the water temperature drops 0.5°C below the set temperature, the spa heater automatically kicks in to bring the water back to the desired temperature.
In some cases, the spa heater may not kick in straight away because the temperature in the spa water has not reached the temperature sensor in the heating tube.
Is your spa having heating issues?
Click the appropriate button below to learn more about the common heating issues with Vortex™ and Fisher™ Spas, and how to resolve them.