When you take a nice hot shower on that cold winter morning and find all that comes out is ice cold water, you need a plumber who can react quickly and fix the hot water in no time.
The thermostat is broken
A thermostat is a device that regulates the temperature of the water in the hot water system. If the thermostat breaks, it can be closed permanently, which means the water is always too hot and constantly heated even when it's not needed.
This can be very expensive. Thermostats can also be damaged by permanently turning them off. You can get more information regarding hot water service via https://www.bluehorizonplumbing.com.au/hot-water.
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Gas water heater
If you do not have hot water and hot water gas service, make sure the indicator light is not off. The control light is a small gas flame with which the main heater can be restarted under the control of the thermostat. Without this indicator light cannot happen and your water will cool down.
The electrical element is damaged
In an electric hot water system, there is a device called a heating element. Usually in the form of a coil that extends and is inserted into the side of the boiler storage tank. Over time, corrosion will occur and eventually the elements will either short circuit or just corrode.
After all, this means taking a cold shower until you call the plumber. Replacing items is actually an electrical issue, but most installers have limited electrical permits to do this type of work.