Replacing a water heater thermostat is a relatively simple task that can be completed in a few hours. A water heater thermostat is a device that controls the temperature of the water in your water heater. When the water temperature drops below a certain level, the thermostat turns on the heating element, which heats the water. When the water temperature reaches the desired level, the thermostat turns off the heating element.
There are two main types of water heater thermostats: mechanical and digital. Mechanical thermostats are the most common type, and they use a dial to set the desired water temperature. Digital thermostats are more precise than mechanical thermostats, and they often have additional features, such as a display that shows the current water temperature.