How do you know if your geyser thermostat is not working?

Answer:
Disconnect power to geyser and remove the thermostat. Turn heat selector to maximum and with the thermostat removed from the geyser and electrical wiring, test for continuity between the input and output sides of the (L)ive side. If there is continuity the thermostat is ok and the fault may then lie with the element.
First answer by ID3290038211. Last edit by ID3290038211. Question popularity: 4 [recommend question].