How do I check the temperature settings on my hot water tank?

First, turn off the power supply to the hot water tank by switching off the circuit breaker for the tank. You will find the temperature controls behind an access panel on the side of the tank. There are usually two controls, one for each heating element.  Set both elements to the same temperature.

For health and safety reasons you should set the temperature to no less than 60°C (140°F).