Washing machines can heat water using different methods, depending on the type of washing machine. The two primary methods used to heat water in washing machines are:
Built-in Water Heater: Some modern washing machines come equipped with an internal water heater. These machines have an electric heating element integrated into the machine, usually located at the bottom or sides of the wash tub. When you select a hot water wash cycle, the washing machine activates the heating element, which heats the water to the desired temperature before it enters the drum for washing. This method allows the washing machine to provide hot water regardless of the temperature of the water supply.
Hot Water Supply: In most standard washing machines, the hot water used for washing is sourced directly from the hot water supply of your home. When you select a hot water wash cycle, the washing machine opens the hot water valve, and hot water from your water heater flows into the machine's drum for washing. The washing machine does not have an internal heater in this case; it relies on the hot water already available in your plumbing system.
It's worth noting that many washing machines offer different temperature settings, such as cold, warm, and hot. For warm or hot wash cycles, the machine will either use the built-in heater or the hot water supply, depending on the model and settings chosen.
The choice of how water is heated can impact energy efficiency and the overall performance of the washing machine. Washing machines with built-in water heaters can be more energy-intensive since they consume electricity to heat the water. On the other hand, using the hot water supply from your home can be more energy-efficient if your water heater is powered by gas or another more efficient energy source.
In summary, washing machines can heat water using a built-in water heater or by accessing the hot water supply from your home's plumbing system, depending on the machine's design and features.