Jacuzzi Thermostats are an important part of the Jacuzzi puzzle. The Thermostat regulates the temperature and switches the Heating Element on and off.
These Thermostats usually have an Built in safety feature. When the Temp is set on say 30 Degrees and you want to turn it up to 40 degrees, you can’t just turn it to 40 Degrees. From 30 Degrees, you need to turn it back to zero and then to 40 Degrees.
The best way to test this Thermostat is by turning it from left to right. If it makes a clicking sound, it is most probably fine. If it doesn’t click it might have a problem.